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Session programme

GM

GM – Geomorphology

MAL26
Convener: Daniel Parsons
MAL39
Convener: Daniel Parsons

GM1 – General Geomorphology

GM1.1

In the past years, it has become apparent that human activities are increasingly affecting the surface of the Earth. Extreme meteorological events are becoming the new norm, and changes in the climatic drivers of Earth surface processes are pushing the study of geomorphology towards new frontiers. Since several millennia, human activities are causing large changes in ecosystems, land use, hydrological routing, and direct anthropogenic modification of the landscape by construction. These changes impact systems across the full spectrum of geomorphology. A key challenge in the coming years is to translate our understanding of geomorphic processes, which is often based on observations of past or current conditions, into the rapidly changing future.
This session will bring together a series of invited speakers to provide insights and perspectives in this topic from across the field of geomorphology.
While the oral presentations for this session will be invitation-only, we welcome poster contributions. The poster session will provide dedicated time for discussion with the speakers.

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Convener: Kristen Cook | Co-conveners: Annegret LarsenECSECS, Giulia Sofia, Matteo Spagnolo, Andrea Zerboni
NP8.1

The laws of physics are simple, yet what we can see in nature are
complex patterns and shapes continuously changing in time. Understanding
how such complex morphological structures like channel networks, dunes or
vegetation patterns are generated is one of the major challenges in Earth
Science. Often complex non-equilibrium processes lie behind the self
organization of these phenomena.

We invite contributions that seek a deeper understanding of
pattern-generating geophysical processes through both experiments and field observations
as well as through theoretical modeling and computational simulations.

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Co-organized by GM1
Convener: Hansjoerg Seybold | Co-convener: Piotr Szymczak

GM2 – Geomorphologist's Tools, Models and Methods

GM2.1 | PICO

This session aims to bridge the existing gap between the process-focused fields and the technical domain where terrain analysis is developed.
The rapid growth of technology and the availability of topographic information from various platforms and sensors has led to a vast data swamp with unprecedented spatio-temporal range, density, and resolution. Deriving meaningful products from such a large pool of data sets new challenges.

We aim to foster inter-disciplinarity in digital terrain analysis from ANY discipline which touches on geomorphometry, including but not exclusive to geomorphology (tectonic/volcanic/climatic/glacial), planetary science, archaeology, geo-biology, natural hazards, computer science, remote sensing, statistics and image analysis.
We invite submissions related to the application of geomorphometric methods at multiple scales (from local to global). We welcome works related to innovative geomorphometric variables as well as their physical, mathematical and geographical meanings. Submissions related to new techniques in high-resolution terrain or global-scale data production and analysis, as well as studies focused on the associated error and uncertainty, are also welcome.
We actively encourage contributors to present works “in development”, as well as novel ways to apply established techniques.
Geomorphometry facilitates cross-disciplinary research with improved investigations across space and time, blurring the line between traditional approaches and computer modelling. Early-career scientists are in a position to be game-changers, ushering in a new era of digital terrain analysis: we strongly encourage them to contribute and help drive innovation in our community, presenting their work to this session.

The currently available multi-resolution topographic datasets require that scientists continue to develop new tools and analysis approaches. While geomorphometry attracts many researchers, the potential lack of communication across disciplines results in efforts to be mainly focused on problems within individual fields of application. We want to foster collaboration and the sharing of ideas across subject-boundaries, between technique developers and users, enabling us as a community to fully exploit the wealth of knowledge inherent in our digital landscape.

Just remember, the driver for new ideas and applications often comes from another speciality, discipline or subject: Your solution may already be out there waiting for you!

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Co-organized by ESSI2/NH3/PS4
Convener: Giulia Sofia | Co-conveners: Susan Conway, Stuart GrieveECSECS, John K. HillierECSECS, Michael Smith
GM2.2 | PICO

Geomorphological mapping is one of the most important tools used to understand landscape character and evolution on Earth and other planetary bodies. In the digital era, cartographic products have become increasingly accessible to scientists and the wider society due to the development of GIS technology, increases in data and software availability (i.e. open source), and the expansion of user-friendly and easy-to-access interfaces. Geomorphological maps are crucial in a range of pure scientific and applied disciplines. Applications include reconstructing past depositional processes and environments on Earth and other planetary bodies, landscape evolution modelling, geohazard assessment, planning of engineering activities, and characterising landing sites for planetary lander and rover missions. Recent technological advances in data collection have enhanced mapping quality to new levels of detail and accuracy. Significant developments include the accessibility of high-resolution datasets (for Earth, Mars and the Moon), new data collection methods (e.g. LiDAR data, high-resolution satellite imagery, drones/uncrewed aerial vehicles, geophysical imaging), innovative processing methods (e.g. Structure-from-Motion photogrammetry), and increasing volumes of data available for planets, moons, asteroids, comets, and dwarf planets throughout the Solar System. On Earth, these are often combined with more traditional field-based mapping approaches. As a result of recent advances, we are now able to identify landforms that were not previously detectable and to interpret processes which were previously unknown or unrecognised. Moreover, new semi-automatic and automatic mapping approaches can support rapid delimitation and extraction of selected landforms or even whole landform assemblages.

This session aims to showcase recent advances in landform mapping, and we invite contributions related to mapping of specific landforms as well as whole landsystems in different environments and on other planetary bodies. We particularly welcome studies that (a) demonstrate the potential of multi-method and innovative mapping approaches, (b) showcase novel methods of data collection to solve previously overlooked problems, or (c) present mapping of previously unmapped or newly-emerging landscapes.

**We kindly ask authors to please use the gender-neutral definition ‘uncrewed aerial vehicles’ (rather than unmanned aerial vehicles) for UAVs in their abstracts**

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Convener: Benjamin ChandlerECSECS | Co-conveners: Frances E. G. ButcherECSECS, Marek Ewertowski, Ramón Pellitero Ondicol, Aleksandra Tomczyk
GM2.3

Topographic data are fundamental to landscape and process characterization across the geosciences, for monitoring change and for supporting process modelling. Classic surveying techniques have been augmented by high-resolution laser instruments, opening doors to new applications. Over the last decade, significant advances in digital photogrammetry and computer vision, particularly in ‘structure from motion’ (SfM) algorithms, have democratized data acquisition and offered a new paradigm to geoscientists.
High resolution topographic (HiRT) data are now obtained over spatial scales from millimetres to kilometres, and over durations of single events to lasting time series (e.g. from sub-second to decadal-duration time-lapse), allowing evaluation of dependencies between event magnitudes and frequencies. Such 4D-reconstruction capabilities enable new insight within diverse fields such as soil and rock erosion, volcanology, glaciology, landslide monitoring, and coastal and fluvial geomorphology. Multi-sensor integration enables data acquisition beyond the visible spectrum and both data generation and processing workflows are set to gain from the application of machine and deep learning approaches.
This session will evaluate advances in techniques for acquiring 3D topographic models and in our understanding of the processes behind topographic change over multiple temporal and spatial scales. We invite contributions covering all aspects of HiRT data in the geosciences, and particularly those which transfer traditional expertise or demonstrate a significant advance enabled by novel datasets. We encourage contributions describing new workflows to optimize data acquisition, automated post-processing strategies which consider the inherent uncertainties, and field-based experimental studies using novel multi-instrument, multi-scale and multi-discipline methodologies. Our overarching goal is to provide a cross-disciplinary exchange of experiences with modern topographic modelling technologies and data processing tools, to highlight their potentials, limitations and challenges in different environments.

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Co-organized by G6/GI6/NH6
Convener: Andreas KaiserECSECS | Co-conveners: Anette EltnerECSECS, Mike James, Mark SmithECSECS, Jack WilliamsECSECS
GM2.4

Assessing and monitoring Earth surface processes in extreme environments often requires the development of challenging scientific approaches leading to the raise of innovative techniques. From the highest mountains to the deepest oceans, passive to active monitoring techniques are in constant progress and push further terra incognita boundaries. Recent advances in in-situ geophysical instrumentation (e.g. geophones, Doppler radar, sub bottom profilers, etc.) or remote sensing techniques (e.g. inSAR, unmanned aerial systems, unmanned maritime systems, etc.). have made remote monitoring and data acquisition a reality. These novel techniques represent more affordable, practical solutions for the collection of spatial and temporal data sets in challenging environments.

Most remote monitoring systems installed in extreme environments are site specific and often custom-made by research and development teams to cope with challenges related to power supply and/or weight limitations, poorly accessible areas, and hostile environment characteristics (extreme temperature and pressure, underground and underwater systems, hazardous gas emissions, changing topography). As a result, scientists have to deal with data from a plethora of prototypes installed for different purposes and at different time generating heavy maintenance and logistics burdens.

This session aims to bring together research on holistic, novel and/or in-development monitoring solutions coping with challenging and hostile areas. We welcome contributions from a broad range of disciplines and applications (from mass wasting, snow avalanches, glaciers, cave systems, marine/lake and submarine systems, to volcano and permafrost monitoring) with the aim to initiate discussions and developments of novel approaches and cross-disciplinary transfer of techniques for passive and active monitoring. We are also looking forward to discussing lessons learned from unsuccessful monitoring attempts.

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Co-organized by AS5/CL5/GI6/GMPV9
Convener: Zakaria GhazouiECSECS | Co-conveners: Kristen Cook, Arnaud WatletECSECS, Corentin Caudron
GM2.5

Geochronological frameworks are essential for the study of landscape evolution. Over the last decades, geochronological techniques such as cosmogenic nuclides, thermochronology, radiocarbon and luminescence dating have improved in accuracy, precision, and temporal range. Recently, the development of new approaches, new isotopic/mineral systems and the opportunity to combine these techniques are expanding their range of applications. This session explores these advances and novel applications. These include studies of erosional rates and processes, sediment provenance, burial and transport times, bedrock exposure or cooling histories, landscape dynamics, and the examination of potential biases and discordances in geochronological data. We appreciate contributions that use dating tools which are established or in development, particularly those that quantify geomorphological processes with novel approaches and/or generic implications. We encourage studies that combine different techniques (e.g., CRN, luminescence, thermochronology, etc.) or data sets (e.g., field, remote sensing, numerical modelling), and/or highlight the latest developments and open questions in the application of geochronometers to landscape evolution questions.

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Co-organized by CL5
Convener: Stefanie TofeldeECSECS | Co-conveners: Georgina King, Sebastian Kreutzer, Duna Roda-BoludaECSECS, Renee van DongenECSECS
GM2.6

Seismic techniques are becoming widely used to detect and quantitatively characterise a wide variety of natural processes occurring at the Earth’s surface. These processes include mass movements such as landslides, rock falls, debris flows and lahars; glacial phenomena such as icequakes, glacier calving/serac falls, glacier melt and supra- to sub-glacial hydrology; snow avalanches; water storage and water dynamics phenomena such as water table changes, river flow turbulence and fluvial sediment transport. Where other methods often provide limited spatial and temporal coverage, seismic observations allow recovering sequences of events with high temporal resolution and over large areas. These observational capabilities allow establishing connections with meteorological drivers, and give unprecedented insights on the underlying physics of the various Earth’s surface processes as well as on their interactions (chains of events). These capabilities are also of first interest for real time hazards monitoring and early warning purposes. In particular, seismic monitoring techniques can provide relevant information on the dynamics of flows and unstable slopes, and thus allow for the identification of precursory patterns of hazardous events and timely warning.

This session aims at bringing together scientists who use seismic methods to study Earth surface dynamics. We invite contributions from the field of geomorphology, cryospheric sciences, seismology, natural hazards, volcanology, soil system sciences and hydrology. Theoretical, field based and experimental approaches are highly welcome.

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Co-organized by GI5/NH4/SM1
Convener: Florent GimbertECSECS | Co-conveners: Wei-An ChaoECSECS, Velio CovielloECSECS, Andrea Manconi, Anne SchöpaECSECS
HS9.1

Sedimentary processes in aquatic environments, including entrainment, transport and deposition of sediment by hydrodynamic mechanisms, are key features for various research disciplines, e.g. geomorphology, paleoclimatology, hydraulics or river engineering. An accurate evaluation of entrainment, transport and deposition rates, conditioning river channel morphology and bed composition, is fundamental for an adequate development of conceptual sediment budget models and for calibration and validation of numerical tools.
The main goal of this session is to bring together the community of scientists, scholars and engineers, investigating and applying novel measurement techniques and monitoring concepts, which are crucial to determine sedimentary and hydromorphological processes in rivers, lakes and reservoirs, estuaries, coastal and maritime environments. Within the focus of this session are the evaluation and quantification of bed load and suspended load, flocculation, settling, and resuspension of such processes relevant to morphological channel changes as bed form development, horizontal channel migration, bed armouring and colmation.
Contributions are welcome with a particular focus on single and combined measurement techniques, on postprocessing methods as well as on innovative and advanced monitoring concepts for field applications. Furthermore, we welcome contributions containing recent results in a temporal and spatial scale on sediment budgets as well as on sedimentary and morphodynamics processes in open water environments.
Contributions may refer (not restricted) to:
-measurements of suspended sediment transport in open water environments, e.g. with optical, acoustical, traditional sampling methods or others;
-measurements of bed load transport, e.g. with bed load samplers, sediment traps, tracers or acoustic and optical methods;
-determination of sediment characteristics, e.g. with mechanical bed material samplers or freeze core technique;
-measurements of critical bed shear stress of cohesive sediments, e.g. with benthic flumes or miscellaneous devices;
-monitoring of morphological changes like lake and reservoir sedimentation, bank erosion or bed armouring, meandering migration, river bends evolution;
-measuring networks / multiple point datasets;
-monitoring concepts including case studies;
-in-situ as well as laboratory calibration of measurement data;
-critical discussion and information exchange on measurement methods and data sets.

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Co-organized by GM2/NH1
Convener: Kordula Schwarzwälder | Co-conveners: Stefan Achleitner, Gabriele Harb, Axel Winterscheid
ITS4.6/NH6.7 | PICO

Smart monitoring and observing system for natural hazards, including satellites, global networks, unmanned vehicles (e.g., UAV), and other linked devices, have become increasingly abundant. We keep restlessly observing and monitoring different natural hazards processes happen on the earth (e.g., landslide, debris flows, earthquake, flood, storm, tsunami, and many others). This diversity of systems and methods gives natural hazards scientists unprecedented amounts of data before, during, and after events. In parallel, new data science and machine learning techniques are constantly being developed that allow us to mine these large datasets. Such data and methods not only bring a better understanding of the processes that govern the natural hazards processes, and allow monitoring of natural hazards, but also results in a better understanding of how hazard impacts can compound and cause cascading consequences. Hence, data science and machine learning methods are dramatically changing natural hazard science. We invite abstracts from all aspects of natural-hazards research applying data science and machine learning to understand natural hazard events and hazards over both different time and spatial scale.

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Co-organized by ESSI2/GI2/GM2/HS12/NP4/SM1
Convener: Hui TangECSECS | Co-conveners: Jean Braun, Kejie ChenECSECS, Stephanie OlenECSECS, Jens Turowski
ITS4.5/GI1.4

Environmental systems often span spatial and temporal scales covering different orders of magnitude. The session is oriented in collecting studies relevant to understand multiscale aspects of these systems and in proposing adequate multi-platform and inter-disciplinary surveillance networks monitoring tools systems. It is especially aimed to emphasize the interaction between environmental processes occurring at different scales. In particular, a special attention is devoted to the studies focused on the development of new techniques and integrated instrumentation for multiscale monitoring high natural risk areas, such as: volcanic, seismic, energy exploitation, slope instability, floods, coastal instability, climate changes and other environmental context.
We expect contributions derived from several disciplines, such as applied geophysics, geology, seismology, geodesy, geochemistry, remote and proximal sensing, volcanology, geotechnical, soil science, marine geology, oceanography, climatology and meteorology. In this context, the contributions in analytical and numerical modeling of geological and environmental processes are also expected.
Finally, we stress that the inter-disciplinary studies that highlight the multiscale properties of natural processes analyzed and monitored by using several methodologies are welcome.

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Co-organized by AS4/CL2/GM2/GMPV9/NH8/NP3/OS4/SM5/SSS10
Convener: Pietro Tizzani | Co-conveners: Francesca Bianco, Antonello Bonfante, Raffaele Castaldo, Nemesio M. Pérez
CL5.1

During the Quaternary Period, the last 2.6 million years of Earth's history, changes in environments, and climate shaped human evolution. In particular, large-scale features of atmospheric circulation patterns varied significantly due to the dramatic changes in global boundary conditions that accompanied abrupt changes in climate. Reconstructing these environmental changes relies heavily on precise and accurate chronologies. Dependent on records, time range, and research questions, different methods can be applied, or a combination of various dating techniques.
Varve counting and dendrochronology allow for the construction of high-resolution chronologies, whereas radiometric methods (radiocarbon, cosmogenic in-situ, U-Th) and luminescence aim at longer time scales and often are complementary or supportive.
In this session, contributions are particularly welcome that aim to (1) reduce, quantify and express dating uncertainties in any dating method, including high-resolution radiocarbon approaches; (2) use established geochronological methods to answer new questions; (3) use new methods to address longstanding issues, or; (4) combine different chronometric techniques for improved results, including the analysis of chronological datasets with novel methods, e.g. Bayesian age-depth modelling. Applications may aim to understand long-term landscape evolution, quantify rates of geomorphological processes, or provide chronologies for records of climate change.

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Co-organized by GM2/SSS3
Convener: Irka Hajdas | Co-conveners: Andreas Lang, Gina E. Moseley, Arne RamischECSECS
HS9.3

Complex hydro-morphological processes, such as erosion, transport, deposition or fan development, affect open water environments, including rivers, estuaries as well as lakes and reservoirs. As a consequence, many research tasks as well as practical applications rely on the correct prediction of these processes. Numerical models have become a powerful tool in the research fields of hydraulic engineering and geosciences during the last decades to simulate these hydro-morphological processes. With improved algorithms as well as an increasing computational power, it has become feasible to simulate the interaction of water, sediments and air (multiphase flows) with high resolution in space and time. In addition, with an increasing quantity and quality of field and laboratory data available, numerical models become more accurate and it is possible to gain new insights into complex physical processes, e.g. dune development, river bed armoring, density driven transport or even the transport of individual sediment particles. The main goal of this session is to bring together scientists and engineers, which develop, improve, as well as apply numerical models for multiphase flows in open water environments. We invite contributions that deal with numerical modeling from small-scale, such as the transport of sediment particles, to large-scale interactions, such as long-term development of hydro-morphological processes in rivers, lakes, reservoirs and estuaries.
The main topics are:
• Entrainment processes of sediments (from cohesive sediments to armored river beds)
• Bed load and suspended sediment transport processes (including flocculation processes)
• Processes in hydro-morphology, such as bed form development, grain size sorting, bed armor development, bank erosion, meandering migration or reservoir sedimentation
• Discrete element and particle resolved methods in sediment transport modeling
• Simulation of sediment management (in rivers, reservoirs, lakes and estuaries) including planning, operation and maintenance of hydro power plants
• Design and evaluation of restoration measures to revitalize rivers
• Navigation issues, such as sediment replenishment, dredging and erosion induced by ship generated waves
• Flood related issues such as an evaluation of the effects of long term morphological bed changes on flood security
• Eco-hydraulics such as flow – sediment – vegetation interaction
• Density driven transport in reservoirs, lakes and estuaries

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Co-organized by GM2
Convener: Sándor Baranya | Co-conveners: Stefan Haun, Nils Rüther, Bernhard Vowinckel
ITS4.2/ESSI4.2 | PICO

All areas in the Earth sciences face the same problem of dealing with larger and more complex data sets that need to be analyzed, visualized and understood. Depending on the application domain and the specific scientific questions to be solved, different visualization strategies and techniques have to be applied. Yet, how we communicate those complex data sets, and the effect that visualization strategies and choices have on different (expert and non-expert) audiences as well as decision-makers remains an under-researched area of interest. For this "PICO only" session, we not only invite submissions that demonstrate how to create effective and efficient visualizations for complex and large earth science data sets but also those that discuss possibilities and challenges we face in the communication and tailoring of such complex data to different users/ audiences. Submissions are encouraged from all geoscientific areas that either show best practices or state of the art in earth science data visualization or demonstrate efficient techniques that allow an intuitive interaction with large data sets. In addition, we would like to encourage studies that integrate thematic and methodological insights from fields such as for example risk communication more effectively into the visualization of complex data. Presentations will be given as PICO (Presenting Interactive COntent) on large interactive touch screens. This session is supported by ESiWACE2. ESiWACE2 has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No 823988.

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Co-organized by EOS7/CL5/GD10/GM2
Convener: Niklas Röber | Co-conveners: Michael Böttinger, Joseph Daron, Susanne Lorenz
HS1.1.4

River monitoring is still a challenge for hydrologists and environmental agencies. The expansion of the human population, urbanisation, and technological advancements have put forward an ongoing water management agenda. River streamflow is one of the most crucial hydrological variables in terms of 'basin health' description (from an ecological point of view), and for flood risk management and modelling. However, despite the efforts on river flow monitoring, there are only a few locations that have been monitored long enough with an adequate spatial resolution to produce long spatial timeseries. In consequence, there is an increasing need for cost-effective methods for real-time streamflow quantification, especially in data-scarce environments. Emerging innovative methods should be tested and benchmarked under different conditions (e.g. low, high, and complex flows) to ensure accurate and consistent results. Furthermore, these methods must be harmonised for promoting good practices and dissemination over the globe. In this context, this session focuses on:

1) The use of remote sensing approaches for hydrological and morphological monitoring;
2) Real-time acquisition of hydrological variables;
3) Strategies to quantify and describe hydro-morphological evolution of rivers;
4) New methods to cope with data-scarce environments;
5) Innovative methodologies for measuring/modelling/estimating river stream flows;
6) Inter-comparison of innovative and classical models and approaches;
7) Quantification of uncertainties; and,
8) Guidelines for hydro-morphological streamflow monitoring.

Contributions are welcome with emphasis on image-velocimetry or other velocity measurement techniques, wetted cross-section retrieval from digital surface models (e.g. computed with multi-media photogrammetry/structure-from-motion, or other bathymetric techniques), and quantification of stream flows and related uncertainties. Additionally, presentations of case studies considering fixed cameras or innovative sensors, Unmanned Aerial Systems (UASs) and Unmanned Surface Vehicles (USVs), airborne or satellite-based approaches, and traditional in-situ measurements are encouraged. This session is sponsored by the COST Action CA16219, Harmonisation of UAS techniques for agricultural and natural ecosystems monitoring (HARMONIOUS).

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Co-organized by GM2/NH1
Convener: Alonso PizarroECSECS | Co-conveners: Filippo BandiniECSECS, Silvano F. Dal SassoECSECS, Anette EltnerECSECS
HS10.12

Changes in land uses may have heavy consequences on many environmental issues, such as water shortage and quality decay, biodiversity losses and soil degradation. Also climate change, resulting from the increase in greenhouse gas emissions, determines strong modifications on the environment, with particular impacts on water resources availability. The future climate trends on a planetary scale, showing significant increase in the temperature and a reduction in precipitation, will heavily impact the hydrological and ecological processes at local and global scales.
The combination of land use and climate changes is expected to have more than an additive effect on the ecosystem. The high risks of damages on soil, water, and life of plants, animals and human lives need much attention, in order to predict the negative effects on the ecosystems and plan the mitigation countermeasures. A modelling approach and the proposal of mitigation actions may be key tools to evaluate and reduce the expected impacts of land use and climate changes.
The proposed session aims to: (i) enhance a better comprehension of the geomorphological, hydrological and ecological effects induced by land use and climate changes at both planetary and local scales; (ii) optimise the traditional analytical techniques and propose novel evaluation methods of ongoing and future trends (e.g., monitoring by remote sensing, weather forecast and hydrological models); (iii) propose and experiment innovative and efficient management practices (such as eco-friendly restoration techniques and soil conservation models with low hydrological impacts), contributing to the mitigation of soil and water degradation rates under different climate and land use scenarios.
Contributions to this session about the analysis of the state-of-the-art of and new ideas and measures for mitigation of impacts of climate and land use changes in different ecosystems are welcome. Gathering the community of scientists and technicians will allow sharing of experiences and proposals (e.g., detailed field feedback, high quality laboratory works, validated numerical modelling and effectiveness assessments) to make clearer the complex interactions between ecological elements, geomorphic processes and engineering activities and suggest new guidelines to land planners and hydro-geological risk managers.

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Co-organized by CL2/GM2/SSS10
Convener: Demetrio Antonio Zema | Co-convener: Manuel Esteban Lucas-Borja
GMPV9.1

Our ability to observe the Earth has been revolutionised by technological advances in remotely operable robotics over the past decade. Innovative robotic strategies are now bridging the gap between in-situ records and remote sensing, and are providing repeatable measurements at high spatial and temporal resolution in fields such as: Volcanic plume processes, atmospheric pollution, glacier dynamics, natural and anthropogenic radiation, terrain stability and geomorphological processes, and geophysical surveying. Remotely deployable sensors are now also facilitating the acquisition of long-term datasets in hazardous environments. Unoccupied Aerial Systems (UAS), or drones, are arguably the most widely utilised of robotic platforms, and certainly the most rapidly expanding application. However, the field of remote robotics also encompasses ground- or water-based solutions to sampling in previously inaccessible locations, or for increasing automation in spatial data collection. We invite abstract submissions demonstrating novel scientific advances related to ground, underwater and aerial robotics. In particular, we welcome hazards-based applications utilising robotic strategies for monitoring, hazard assessment, and community-level capacity building across the geosciences.

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Co-organized by AS5/GM2/NH6
Convener: Emma LiuECSECS | Co-conveners: Tom ChudleyECSECS, Mel Rodgers, Kieran WoodECSECS
GD1.3

Geoscientists have long assumed that the lithosphere is in isostatic balance. But physics predicts that mantle convection and subduction should cause long wavelength deflections of the Earth’s surface, with length scales > 500 km and vertical amplitudes as large as 1 to 2 km. The long-term evolution of dynamic topography is being studied using basin analysis, coastal terraces, and reverse-flow modeling of the mantle. The effects appear to large and significant adjacent to ridge crests, subduction zones, active continental thrust belts, and above remnant slabs. We seek geodynamic and geologic-based contributions that examine the setting, scale, and evolution of dynamic topography in both the oceans and continents.

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Co-organized by GM2/SSP1
Convener: Mark Brandon | Co-conveners: Jörg Robl, Kurt Stüwe
SSS11.1

Soil profile or pedon descriptions are important in digital soil mapping but the methods of soil profile descriptions have not changed much in the past decades. This session will bring together a range of ideas and novel practices for soil profile study and analysis. The session includes tools and techniques for soil profile observations, continuous depth functions of soil properties, and the mapping of the soil profile. These offer potential for enhance our understanding of soils, and their genesis and classification

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Co-organized by GM2
Convener: Alfred Hartemink | Co-conveners: Fabio Terribile, Richard Heck
GI1.3

Ground-acquired historical images from the late 1800s and aerial images from the early 1900s have been used for military, civil, and research purposes in natural sciences. These multi-temporal historical images have the unequalled potential for documenting the past environmental changes caused by anthropogenic and natural factors in the pre-satellite era.
The increasing availability of historical images as digitised images, together with advancements of digital photogrammetry, have heightened the interest in these data in the scientific community for assessing and reconstructing long-term surface evolution from local to landscape scale. Especially, newly evolved dense-matching algorithms from computer sciences and photogrammetry allow for unprecedented high-resolution data retrieval by reprocessing the historical imagery with these new methods.
However, despite the available volume of historical images, their full potential is not widely exploited yet. Currently, there is a lack of knowledge on the types of information that can be derived and their applications in geoscience. Furthermore, there are no clear photogrammetric workflows to automatically generate 3D (three-dimensional) information in the forms of point clouds or digital elevation models from stereo images as well as 2D products such as orthophotos. Amongst others, difficulties to deal with old camera models or missing information about the geometry of historical cameras have to be dealt with. Similarly, the quality and accuracy of this information are not fully understood.
Our goal is to create a diversified and interdisciplinary session that explores the potential of historical images, ranging from the photogrammetric techniques to the reconstruction and interpretation of 2D and 3D changes over the past. Hence, this session welcomes submissions on the use of historic imagery in a wide range of geoscience disciplines such as geomorphology, cryosphere, volcanology, bio-geosciences, and geology.

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Co-organized by EOS9/CL2/CR2/GM2/HS13/NH6
Convener: Livia PiermatteiECSECS | Co-conveners: Anette EltnerECSECS, Penelope HowECSECS, Wilfried KarelECSECS
GI2.3

The interactions between geo-environmental and anthropic processes are increasing due to the ever-growing population and its related side effects (e.g., urban sprawl, land degradation, natural resource and energy consumption, etc.). Natural hazards, land degradation and environmental pollution are three of the possible “interactions” between geosphere and anthroposphere. In this context, spatial and spatiotemporal data are of crucial importance for the identification, analysis and modelling of the processes of interest in Earth and Soil Sciences. The information content of such geo-environmental data requires advanced mathematical, statistical and geomorphometric methodologies in order to be fully exploited.

The session aims to explore the challenges and potentialities of quantitative spatial data analysis and modelling in the context of Earth and Soil Sciences, with a special focus on geo-environmental challenges. Studies implementing intuitive and applied mathematical/numerical approaches and highlighting their key potentialities and limitations are particularly sought after. A special attention is paid to spatial uncertainty evaluation and its possible reduction, and to alternative techniques of representation of spatial data (e.g., visualization, sonification, haptic devices, etc.).

In the session, two main topics will be covered (although the session is not limited to them!):
1) Analysis of sparse (fragmentary) spatial data for mapping purposes with evaluation of spatial uncertainty: geostatistics, machine learning, statistical learning, etc.
2) Analysis and representation of exhaustive spatial data at different scales and resolutions: geomorphometry, image analysis, machine learning, pattern recognition, etc.

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Co-organized by ESSI2/GM2/SSS10
Convener: Caterina GozziECSECS | Co-conveners: Marco Cavalli, Sebastiano Trevisani
GI5.1

Ground Penetrating Radar (GPR) is a safe, advanced, non-destructive and non-invasive imaging technique that can be effectively used for inspecting the subsurface as well as natural and man-made structures. During GPR surveys, a source is used to send high-frequency electromagnetic waves into the ground or structure under test; at the boundaries where the electromagnetic properties of media change, the electromagnetic waves may undergo transmission, reflection, refraction and diffraction; the radar sensors measure the amplitudes and travel times of signals returning to the surface.

This session aims at bringing together scientists, engineers, industrial delegates and end-users working in all GPR areas, ranging from fundamental electromagnetics to the numerous fields of applications. With this session, we wish to provide a supportive framework for (1) the delivery of critical updates on the ongoing research activities, (2) fruitful discussions and development of new ideas, (3) community-building through the identification of skill sets and collaboration opportunities, (4) vital exposure of early-career scientists to the GPR research community.

We have identified a series of topics of interest for this session, listed below.

1. Ground Penetrating Radar instrumentation
- Innovative GPR systems and antennas
- Equipment testing and calibration procedures

2. Ground Penetrating Radar methodology
- Survey planning and data acquisition strategies
- Methods and tools for data analysis, interpretation and visualization
- Data processing, electromagnetic modelling, imaging and inversion techniques
- Studying the relationship between GPR sensed quantities and physical properties of inspected subsurface/structures useful for application needs

3. Ground Penetrating Radar applications and case studies
- Earth sciences
- Civil and environmental engineering
- Archaeology and cultural heritage
- Management of water resources
- Humanitarian mine clearance
- Vital signs detection of trapped people in natural and manmade disasters
- Planetary exploration

4. Combined use of Ground Penetrating Radar and other geoscience instrumentation, in all applications fields

5. Communication and education initiatives and methods

-- Notes --
This session is organized by Members of TU1208 GPR Association (www.gpradar.eu/tu1208), a follow-up initiative of COST (European Cooperation in Science and Technology) Action TU1208 “Civil engineering applications of Ground Penetrating Radar”.

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Co-organized by EMRP2/GM2/NH6
Convener: Aleksandar Ristic | Co-conveners: Alessandro FedeliECSECS, Lara Pajewski, Luis Rees-HughesECSECS, Milan VrtunskiECSECS
ITS4.7/SM1.4

The past few years have seen an increase in the application of machine learning methods for geophysical data analysis. This is due to the increased adoption and visibility of freely available and easy-to-use machine learning toolkits, faster computation, reduced cost of data storage, and the very large sets of continuous geophysical and laboratory experimental data. The combination of these factors means that now is the time to consider machine learning as one of the key tools in both improving routine data processing and better understanding the underlying solid-earth processes.

In this session, we welcome machine-learning focused presentations covering topics such as seismic waveform processing, earthquake cataloging, earthquake classification, earthquake cycle behavior from numerical and laboratory experiments, computer vision approaches to tectonic and volcanic monitoring, and geodynamic modelling. We also welcome abstracts from related geophysical fields that use similar data, such as from near surface processes and geophysical hazards (e.g. rockslides, avalanches, etc.).

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Co-organized by ESSI2/GD10/GM2/GMPV1/NP4/TS10
Convener: Jonathan BedfordECSECS | Co-conveners: Fabio CorbiECSECS, Leonard SeydouxECSECS
ITS4.9/ESSI2.17

Most of the processes studied by geoscientists are characterized by variations in both space and time. These spatio-temporal phenomena have been traditionally investigated using linear statistical approaches, as in the case of physically-based models and geostatistical models. Additionally, the rising attention toward machine learning, as well as the rapid growth of computational resources, opens new horizons in understanding, modelling and forecasting complex spatio-temporal systems through the use of stochastics non-linear models.
This session aims at exploring the new challenges and opportunities opened by the spread of data-driven statistical learning approaches in Earth and Soil Sciences. We invite cutting-edge contributions related to methods of spatio-temporal geostatistics or data mining on topics that include, but are not limited to:
- advances in spatio-temporal modeling using geostatistics and machine learning;
- uncertainty quantification and representation;
- innovative techniques of knowledge extraction based on clustering, pattern recognition and, more generally, data mining.
The main applications will be closely related to the research in environmental sciences and quantitative geography. A non-complete list of possible applications includes:
- natural and anthropogenic hazards (e.g. floods; landslides; earthquakes; wildfires; soil, water, and air pollution);
- interaction between geosphere and anthroposphere (e.g. land degradation; urban sprawl);
- socio-economic sciences, characterized by the spatial and temporal dimension of the data (e.g. census data; transport; commuter traffic).

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Co-organized by GM2/HS12/NH8/NP4/SSS12
Convener: Federico AmatoECSECS | Co-conveners: Fabian GuignardECSECS, Luigi LombardoECSECS, Marj Tonini
NH9.12

In recent years an increasing number of research projects focused on natural hazards (NH) and climate change impacts, providing a variety of information to end user or to scientists working on related topics.

The session aims at promoting new and innovative studies, experiences and models to improve risk management and communication about natural hazards to different end users.

End users such as decision and policy makers or the general public, need information to be easy and quickly interpretable, properly contextualized, and therefore specifically tailored to their needs. On the other hand, scientists coming from different disciplines related to natural hazards and climate change (e.g., economists, sociologists), need more complete dataset to be integrated in their analysis. By facilitating data access and evaluation, as well as promoting open access to create a level playing field for non-funded scientists, data can be more readily used for scientific discovery and societal benefits. However, the new scientific advancements are not only represented by big/comprehensive dataset, geo-information and earth-observation architectures and services or new IT communication technologies (location-based tools, games, virtual and augmented reality technologies, and so on), but also by methods in order to communicate risk uncertainty as well as associated spatio-temporal dynamic and involve stakeholders in risk management processes.

However, data and approaches are often fragmented across literature and among geospatial/natural hazard communities, with an evident lack of coherence. Furthermore, there is not a unique approach of communicating information to the different audiences. Rather, several interdisciplinary techniques and efforts can be applied in order to simplify access, evaluation, and exploration to data.

This session encourages critical reflection on natural risk mitigation and communication practices and provides an opportunity for geoscience communicators to share best methods and tools in this field. Contributions – especially from Early Career Scientists – are solicited that address these issues, and which have a clear objective and research methodology. Case studies, and other experiences are also welcome as long as they are rigorously presented and evaluated.

In cooperation with NhET (Natural hazard Early career scientists Team

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Co-organized by GM2
Convener: Raffaele AlbanoECSECS | Co-conveners: Valeria CigalaECSECS, Jonathan RizziECSECS
NH6.1

Remote sensing and Earth Observations (EO) are used increasingly in the different phases of the risk management and in development cooperation, due to the challenges posed by contemporary issues such as climate change, and increasingly complex social interactions. The advent of new, more powerful sensors and more finely tuned detection algorithms provide the opportunity to assess and quantify natural hazards, their consequences, and vulnerable regions, more comprehensively than ever before.
Several agencies have now inserted permanently into their program the applications of EO data to risk management. During the preparedness and prevention phase, EO revealed, fundamental for hazard, vulnerability and risk mapping. EO data intervenes both in the emergency forecast and early emergency response, thanks to the potential of rapid mapping. EO data is also increasingly being used for mapping useful information for planning interventions in the recovery phase, and then providing the assessment and analysis of natural hazards, from small to large regions around the globe. In this framework, Committee on Earth Observation Satellites (CEOS) has been working from several years on disasters management related to natural hazards (e.g., volcanic, seismic, landslide and flooding ones), including pilots, demonstrators, recovery observatory concepts, Geohazard Supersites and Natural Laboratory (GSNL) initiatives and multi-hazard management projects.

The session is dedicated to multidisciplinary contributions focused on the demonstration of the benefit of the use of EO for natural hazard and risk management.
The research presented might focus on:
- Addressed value of EO data in hazard/risk forecasting models
- Innovative applications of EO data for rapid hazard, vulnerability and risk mapping, the post-disaster recovery phase, and in support of disaster risk reduction strategies
- Development of tools for assessment and validation of hazard/risk models

The use of different types of remote sensing (e.g. thermal, visual, radar, laser, and/or the fusion of these) is highly recommended, with an evaluation of their respective pros and cons focusing also on future opportunities (e.g. new sensors, new algorithms).
Early-stage researchers are strongly encouraged to present their research. Moreover, contributions from international cooperation, such as CEOS and GEO initiatives, are welcome.

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Co-organized by GM2
Convener: Paolo Tarolli | Co-conveners: Kuo-Jen Chang, Antonio Montuori, Michelle Parks

GM3 – Weathering, Soils, and Sediment Transport

GM3.1 | PICO

Spatial and temporal variations in natural environments controlled by complex feedbacks or heterogeneity in ecosystems influence biogeochemical processes, nutrient availability and cycling, carbon budget and storage, but also ecology and biodiversity. Humans have been modifying and transforming the natural landscape for thousands of years (e.g. through the effects of early pastoralism and agriculture, or channelization of rivers), which has led to a reduction in ecosystem complexity. This in turn has resulted in alterations to environmental fluxes (e.g. sediments, water, biogeochemical), the overall functioning of the systems, as well as any potential benefits from ecosystem services. By bringing together scientists from the fields of Geomorphology, Hydrology, Biogeosciences, and Soil Science, in this trans-disciplinary session we aim to stimulate discussion effects of ecosystem heterogeneity and complexity on environmental processes and feedbacks, changes in fluxes, their link to and implications for nutrient cycling, and all across varying spatial and temporal scales.
An illustrative, but not exclusive example would be investigations on the role of biophysical complexity and heterogeneity within rivers and floodplains on biogeochemical fluxes and carbon cycling. We also invite contributions from researchers investigating the effects of spatial heterogeneity (e.g. channel complexity, or hydrological storage zones), and temporal variability (e.g. seasonality, event-based) on stream metabolism, carbon (e.g. SOC, DOC, POM), transport, production and sequestration. Finally, we welcome studies on sediment, water, and nutrient transport and cycling, and encourage examples from all other terrestrial or marine biomes.
This session also invites studies which investigate not only the effects, but also the origin of spatial and temporal heterogeneity and complexity, and its loss (or increase?) through e.g. human modifications or changing climate. By taking a combined trans-disciplinary approach, we aim to further our understanding of the drivers and effects of heterogeneity and complexity through time and space, which will help to inform sustainable management practices of environmental systems in the near-future.
This session aims to take an ecosystem approach, and we welcome transdisciplinary contributions from Geomorphology, Hydrology, Biogeosciences and Soil System Science, but also all other disciplines. All scales are welcome.

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Co-organized by BG1/HS12
Convener: Annegret LarsenECSECS | Co-conveners: Joshua LarsenECSECS, Hana JurikovaECSECS
SSS12.10

Deep weathering covers, such as laterites, constitute a major expression of the critical zone, especially in tropical environments and participate significantly to the global geochemical budgets, weathering and erosion fluxes, and atmospheric greenhouse gas consumption. Despite their factual importance for the Earth surface, several important questions are still unanswered about their mode and timing of their formation, and their evolution in response to shifts in climatic and geodynamic forcing. We encourage all contributions addressing those questions using mineralogical studies, geochemical mass balance and isotopic signals in deep soil profiles or in rivers, dating tools at different time scales, or modeling approaches that can integrate those data to understand the evolution of deep weathering covers though time and their role in the global feedbacks between weathering and climate.

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Co-organized by CL1/GM3
Convener: Cecile Gautheron | Co-conveners: Julien Bouchez, Jean Braun, Emmanuelle Puceat
GM3.3

Modelling of Earth and planetary surface processes has made good use of the continuum framework, rather than directly dealing with particle scale processes, partly because of the typical large scale of the problem. Experiments, field observations, and modelling have shown the dynamics of discrete particle interactions, sometimes referred to as ‘granular physics’, plays an important role in erosion, transport, deposition and more generally in the evolution of landscapes and hazard analysis.
In particular, segregation by size, density and other properties largely modifies fluxes and results in complex patterns observed in many geophysical flows and landscapes. Examples include in fluvial geomorphology, armouring, downstream fining and drastic change in bedload and suspended sediment transport ; in debris flows, the coarsening of the front and levees ; and in Aeolian transport the internal structure of dune fields. Segregation also plays a role in hazards associated with snow avalanches, pyroclastic flows, rock avalanches, gravity currents and other geomorphic flows.
This session welcomes experimental, theoretical, numerical and field-based contributions within different environments, including coasts, estuaries, rivers, mountains enhancing our understanding of granular processes as well as their upscaling into continuum-like frameworks able of representing large-scale systems.

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Co-organized by NH3, co-sponsored by agu
Convener: Philippe Frey | Co-conveners: Kimberly Hill, Alexandre Valance
GM3.4

Biota affect hydrology, sediment transport, weathering and soil formation over variable temporal and spatial scales and thereby influence, hillslope, fluvial, coastal, and aeolian landscape form and dynamics. In turn, geomorphological processes have large impacts on ecological processes by shaping topography and affecting water availability, which determines biological diversity and succession.
Understanding these feedbacks between biological and geomorphological processes is becoming increasingly important as new ‘building with nature’ projects emerge and also increasingly find its way into management (i.e. restoration projects, nature based solutions). Despite some advances, the conceptualisation and quantification of the processes, rates and feedbacks between geomorphology and ecology are still limited, particularly in systems that are sensitive to human-induced or natural environmental change (e.g. high-mountain and polar environments, deserts, hillslopes, rivers and wetlands, salt marshes and deltas).

This session seeks contributions that are investigating biogeomorphology on all spatial and temporal scales, including experimental, field and computational/numerical modelling studies. We especially encourage interdisciplinary studies on river, and delta biogeomorphology, animal influences on geomorphic processes, chronologies of biogeomorphological change, and hillslope processes. Emphasis will be given to novel research on biogeomorphological feedbacks, on the quantification of feedbacks and associated rates, and the investigation of the resilience of coupled eco-geomorphic systems to human impact and climate change.

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Co-organized by HS9
Convener: Annegret LarsenECSECS | Co-conveners: Nico BätzECSECS, Jana EichelECSECS, William NardinECSECS, Wietse van de LagewegECSECS
GM3.5

Transport of sediments due to the action of geophysical flows occurs in fluvial, estuarine, aeolian and other natural or man-made environments on Earth and has been shown to play important formative roles in planets and satellites such as Mars, Titan, and Venus. Understanding the motion and the causes of motion of sediments is still one of the most fundamental problems in hydrological and geophysical sciences. Such processes can vary across a wide range of scales leading to sediment transport and scour which can directly impact both the form (geomorphology) and, on Earth, the function (ecology and biology) of natural surface water systems and the built infrastructure surrounding them. In particular, the feedback between flow and sediment transport is a key process in surface dynamics, finding a range of important applications, from hydraulic engineering and natural hazards protection to landscape evolution and river ecology.

We welcome specific topics of interest that include (but are not restricted to):
-particle-scale mechanics of particle entrainment and disentrainment
-upscaling and averaging techniques for stochastic processes related to granular processes
-interaction among grain sizes in poorly sorted mixtures, including particle segregation
-momentum/energy transfer between turbulent flows and particless
-derivation and solution of conservation equations
-reach scale sediment transport and geomorphic processes
-shallow water hydro-sediment-morphodynamic processes
-fluvial processes in response to reservoir operation schemes

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Co-organized by HS13
Convener: Manousos Valyrakis | Co-conveners: Zhixian Cao, Rui Miguel Ferreira, Mário J Franca, Eric Lajeunesse
GM3.6

Hydro-geomorphic connectivity has emerged as a significant conceptual framework for understanding the transfer of surface water and sediment through landscapes. The concept has had particular success in the field of catchment hydrology and fluvial geomorphology, but has also been employed in, for example, explaining rates of soil erosion by water and sediment export across landscapes in the study of aeolian processes and in fire propagation.

This session invites contributions from all areas of geomorphology, hydrology, soil science, but also from ecology and geochemistry illustrating or identifying the role of connectivity on a local, regional or global scale. Specific themes we would like to promote are:

- advancement of the theory of connectivity, including sound and unambiguous definitions of connectivity and related parameters

- methodology development for measuring connectivity in field and laboratory settings, having a special focus on experiments for conceptualizing the different processes involved

- development of suitable indices of connectivity for different physiographic scenarios –

-development of the use of connectivity in modelling efforts

- to evaluate how human-landscape connectivity relationships determine the resilience/sensitivity/trajectory of managed catchment systems to change

- determining how the concept can be used to enable sustainable land and water management

We hope to use the session to develop a debate that brings together connectivity scientists from different disciplines to generate the basis for an integrated experimental, theoretical and conceptual framework and to find out how we can develop this knowledge into a piece of useable science.

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Co-organized by HS13/SSP3, co-sponsored by IAG
Convener: Ronald PöpplECSECS | Co-conveners: Jantiene BaartmanECSECS, Manuel López-Vicente, Anthony Parsons
GM3.7

The erosion, transport, temporary storage, and deposition of sediment govern the fluxes and distribution of solid mass on the surface of the Earth. The rate and extent of these mass fluxes is controlled by the complex interplay of surface processes that act across a range of spatial and temporal scales. Understanding these processes and their dependence on external forcing (e.g. climate, tectonics) and internal feedbacks (autogenic dynamics) is instrumental for constraining the cycling of sediment from source-to-sink, and to invert sedimentary archives for past environments.
A growing body of studies continues to develop a process-based understanding of the coupling between climate, tectonics, erosion, and the transport of solids across large catchments. Important insights into sediment recycling and residence time have been provided by recent advances in geochemical and geophysical techniques, highlighting the dynamic nature of sediment transport. However, many challenges remain including; (1) fully quantifying the time- and spatial scales of sediment transport, (2) tracking signals across catchments and inverting sedimentary records, and (3) assessing the importance of large and infrequent events in controlling erosion and sediment transport.
In this session we welcome field-based, experimental, and modelling studies, that (1) constrain mechanisms, rates, and scales of erosion, transport, and deposition processes, (2) analyse the influence of internal and external forcing on these processes, (3) investigate the propagation of geochemical or physical signals across the earth surface (such as changes in sedimentary fluxes, grain size distributions, cosmogenic nuclide concentrations) and (4) invert sedimentary archives to learn about past environments. Contributions across all temporal and spatial scales are welcome. We particularly encourage early career scientists to apply for this session.

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Co-organized by BG4/HS13/SSP3
Convener: Oliver FrancisECSECS | Co-conveners: Aaron BufeECSECS, Lisa HarrisonECSECS, Stefanie TofeldeECSECS
GM3.8

Mountain belts are characterized by the fastest physical erosion and chemical weathering rates around the world, and thus represent a major source of sediment and dissolved solutes. The rates and fluxes of erosional and weathering processes in mountainous regions vary over temporal (days to millions of years) and spatial scales and are sensitive to both natural and anthropogenic forcing. As a result, a diverse and complex set of feedbacks between denudation, climate, tectonic activity, vegetation, biodiversity, and land use emerges. These feedbacks affect both long- and short-term natural processes and landscape development as well as human interactions with the environment.

Here, we invite abstracts that employ observational, analytical, or modeling approaches to (1) constrain the processes, rates, and spatial and temporal patterns of physical erosion and chemical weathering in orogenic systems, (2) explore feedbacks between erosion, weathering, and natural and anthropogenic forcing, and (3) address the impact of denudation on multi-functional landscapes and the biosphere.

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Co-organized by NP8/SSP3
Convener: Erica ErlangerECSECS | Co-conveners: Aaron BufeECSECS, Jeremy Caves RugensteinECSECS, Günther PrasicekECSECS
GM3.9

Geomorphologists often study transport processes defined by the interactions of gravity, turbulence (eg. air, or water fluids) and granular matter of different sizes (usually sediments, from nanoparticles to rock boulders). There is consensus among the members of the scientific community that these interactions are complex, inherently stochastic and difficult to predict because there are aspects of the physics of turbulence, granular matter, and their interaction that are not well understood. Another widely accepted idea relates to the lack of sufficient experimental evidence for the verification and generalisation of existing theoretical sediment transport models.

Nevertheless, technological advancements that have taken place during the last fifteen years, such as, PIV, LDV, inertial sensors, and ADV, have led to significantly more accurate experimental descriptions of sediment transport and pertinent turbulent flow characteristics. Furthermore, they have allowed for testing new physical concepts that have been proposed in an effort to better understand various aspects of fluvial and aeolian processes. Impulse is one of those physical concepts. There is a growing body of literature suggesting that the complex fluid flow - loose boundary interactions defining sediment transport are more likely to be captured by the integration of turbulence or gravity forcing over appropriate time scales rather than the “instantaneous” peak value of this forcing. Such realisations open a plethora of theoretical questions (nature of thresholds of motion, relationships with coherent structures at different scales, the role of sediment inertia, the role of creeping) and pose directly corresponding experimental challenges.

This session invites scientists and engineers from all disciplines that work on different aspects of sediment transport across temporal and spatial scales and implement the concept of impulse and its derivatives to interpret related phenomena. We welcome all types of descriptions (analytical, numerical and experimental) for all types of sediment transport (aeolian, fluvial, glacial, hillshlope, coastal and debris) and all phases of sediment motion (entrainment, translation and deposition).

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Co-organized by SSP3
Convener: Georgios ManiatisECSECS | Co-conveners: Panayotis Diplas, A.N. Thanos Papanicolaou
GM3.10

The Earth’s near-surface resembles a free boundary which changes its form in response to tectonics as well as processes driven by atmospheric circulation, biologic activity and solar radiation. The patterns of erosion can be modulated by stress fields and in turn, landscape change modifies these stress fields. Two general classes of stress fields affecting this boundary can be distinguished: (i) internal stress fields, which are embodied in the geomaterial shape and properties, resembling stress history as well as gravitational or topographic forcing; (ii) external stress fields, which is imposed by geomorphic processes and tectonics. Both internal and external stress fields have been argued to provide dominant controls on landscape change and evolution.
In this session, we want to discuss the various expressions of this on the landscape forms, near-surface processes as well as the geomaterials. We want to invite all geoscientists who are interested in the feedback between stress fields and geomorphic evolution. Topics include the relations between fracture mechanics of earth materials or brittle rheology with erosion and weathering processes, and the effects of stress fields on process rates, locations, and therefore on geomorphic shape evolution.
We encourage contributions over all scales and methods, from laboratory tests to long term landscape evolution experiments, geophysical quantification of processes and stress states, conceptual and numerical modelling of stress-driven mechanics and processes, and the history of stress fields that affect and are affected by the dynamic nature of geomorphic systems.

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Co-organized by EMRP1/TS9
Convener: Anne VoigtländerECSECS | Co-conveners: Rachel GladeECSECS, Jens Turowski
SSS8.12

The changes of the mineral assemblage during pedogenesis by chemical weathering and transformation of primary minerals and the subsequent formation and transformation of secondary minerals are tightly linked to hydrological conditions and biological processes. The shifts in types and reactivities minerals constrain the biogeochemical cycles of elements, and thereby, the distribution of nutrients and pollutants in soil, and ultimately, Earth’s climate and life. This complexity still hampers our understanding of mineral weathering, formation, and transformation and the mutual interaction of these processes with biogeochemical element cycles. This holds particularly true for (1) the mechanisms involved at different spatial and temporal scales, (2) the dependence on and feedbacks to climate and biota, and (3) the resulting element speciation, mobility, and bioavailability. This session aims at bringing together field, laboratory, and modeling studies that shed light on the linkage between weathering, formation, and transformation of minerals and the cycling of major (e.g., carbon, nitrogen, phosphorus, and sulfur) and trace elements (e.g., antimony, cadmium, molybdenum, and selenium) in soil.

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Co-organized by BG3/GM3
Convener: Klaus Kaiser | Co-conveners: Christian Mikutta, Daniela Sauer
HS8.1.4

Dissolution, precipitation and chemical reactions between infiltrating fluid and rock matrix alter the composition and structure of the rock, either creating or destroying flow paths. Strong, nonlinear couplings between the chemical reactions at mineral surfaces and fluid motion in the pores often leads to the formation of intricate patterns: networks of caves and sinkholes in karst area, wormholes induced by the acidization of petroleum wells, porous channels created during the ascent of magma through peridotite rocks. Dissolution and precipitation processes are also relevant in many industrial applications: dissolution of carbonate rocks by CO2-saturated water can reduce the efficiency of CO2 sequestration, mineral scaling reduces the effectiveness of heat extraction from thermal reservoirs, acid rain degrades carbonate-stone monuments and building materials.

With the advent of modern experimental techniques, these processes can now be studied at the microscale, with a direct visualization of the evolving pore geometry. On the other hand, the increase of computational power and algorithmic improvements now make it possible to simulate laboratory-scale flows while still resolving the flow and transport processes at the pore-scale.

We invite contributions that seek a deeper understanding of reactive flow processes through interdisciplinary work combining experiments or field observations with theoretical or computational modeling. We seek submissions covering a wide range of spatial and temporal scales: from table-top experiments and pore-scale numerical models to the hydrological and geomorphological modelling at the field scale. We also invite contributions from related fields, including the processes involving coupling of the flow with phase transitions (evaporation, sublimation, melting and solidification).

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Co-organized by ERE6/GM3/GMPV6
Convener: Piotr Szymczak | Co-conveners: Sylvain Courrech du Pont, Linda Luquot
HS9.5

The transfer of sediments and associated contaminants play an important role in catchment ecosystems as they directly influence water quality, habitat conditions and biogeochemical cycles. Contaminants may include heavy metals, pesticides, nutrients, radionuclides, and various organic, as well as organometallic compounds. The environmental risk posed by sediment-bound contaminants is largely determined by the sources and rate at which sediments are delivered to surface water bodies, the residence time in catchments, lakes and river systems as well as biogeochemical transformation processes. However, the dynamics of sediment and contaminant redistribution is highly variable in space and time due to the complex non-linear processes involved. This session thus focuses on sources, transport pathways, storage and re-mobilization, and travel times of sediments and contaminants across temporal and spatial scales as well as their impact on catchment and freshwater ecosystems.

This session particularly addresses the following issues:
• Delivery rates of sediments and contaminants from various sources (i.e. agriculture, urban areas, mining, industry or natural areas);
• Transport, retention and remobilization of sediments and contaminants in catchments and river reaches;
• Modelling of sediment and contaminant transport on various temporal and spatial scales;
• Biogeochemical controls on contaminant transport and transformation;
• Studies on sedimentary processes and morphodynamics, particularly sediment budgets;
• Linkages between catchment systems and lakes, including reservoirs;
• Analysis of sediment archives to appraise landscape scale variations in sediment and contaminant yield over medium to long time-scales;
• Impacts of sediments and contaminants on floodplain, riparian, hyporheic and other in-stream ecosystems;
• Response of sediment and contaminant dynamics in catchments, lakes and rivers to changing boundary conditions and human actions.

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Co-organized by GM3
Convener: Marcel van der Perk | Co-conveners: Patrick Byrne, Núria Martínez-Carreras
NH3.5

Debris flows are among the most dangerous natural hazards that threaten people and infrastructures in both mountainous and volcanic areas. The study of the initiation and of the dynamics of debris flows, along with the characterization of the associated erosion/deposition processes, is of paramount importance for hazard assessment, land-use planning and design of mitigation measures, including early warning systems.
A growing number of scientists with diverse backgrounds are studying debris flows and lahars. The difficulties in measuring parameters related to their initiation and propagation have progressively prompted research into a wide variety of laboratory experiments and monitoring studies. However, there is a need of improving the quality of instrumental observations that would provide knowledge for more accurate hazards maps and modeling. Nowadays, the combination of distributed sensor networks and remote sensing techniques represents a unique opportunity to gather direct observations of debris flows to better constrain their physical properties.
Scientists working in the field of debris flows are invited to present their recent advancements. In addition, contributions from practitioners and decision makers are also welcome. Topics of the session include: field studies and documentation, mechanics of debris-flow initiation and propagation, laboratory experiments, modeling, monitoring, hazard and risk assessment and mapping, early warning, and alarm systems.

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Co-organized by GM3/HS13
Convener: Marcel Hürlimann | Co-conveners: Velio CovielloECSECS, Xiaojun Guo, Roland Kaitna
SSS10.7

Soil organic matter (SOM) is an ecosystem property that emerges from a suite of complex biological, geochemical, and physical interactions across scales. As the largest pool of actively-cycling terrestrial carbon, understanding how SOM persistence and vulnerability will respond to global change is critical. However, Earth System Models (ESMs) are often unable to capture emergent SOM patterns and feedbacks at across smaller spatial and temporal scales. Identifying, prioritizing, and scaling key driving mechanisms from detailed process models to advance ESMs is crucial, and better empirical constraints on SOM pools and fluxes are urgently needed to advance understanding and provide model benchmarks. Interdisciplinary research and observation networks collecting long-term, geographically-distributed data can help elucidate key mechanisms, and international efforts that synthesize and harmonize these data are needed to inform data-model comparisons.

We invite theoretical and empirical contributions that investigate controls on SOM across scales, from detailed process understanding to emergent landscape-scale dynamics in natural and managed ecosystems. We seek modelling studies that work across scales, data analyses that leverage multi-site networks and/or long-term experiments, or collaborations between empiricists and modelers within and across networks. Studies that use novel tools across scales, from microbial -omics to remote sensing, are also welcome.

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Co-organized by GM3/NP3
Convener: Katerina GeorgiouECSECS | Co-conveners: Rose AbramoffECSECS, Alison HoytECSECS, Avni MalhotraECSECS, Artem Vladimirov
SSS6.9

The parameterization of land surface processes and related properties critically determines the magnitudes and partitioning of water, energy, and carbon fluxes. Studies have shown that uncertainty in the estimates of key soil properties remain large, and that the temporal variation of soil structure (e.g., due to compaction), that has a large effect on soil properties in reality, is often not considered. These parameter uncertainties, missing processes, process descriptions that lack reality, and the assumption that soil parameters remain constant in time, adversely impact the fidelity of estimates of soil water, energy, and carbon fluxes by land surface models. For example, in recent years, highly spatially resolved global data sets of soil properties have been developed for improved parameterization of soil hydraulic properties in particular, yet lacking incorporation in Earth system models.
This scientific session welcomes contributions on improved parameterization of soil and critical zone processes, relevant for modelling land surface processes in the climate, hydrological, biogeosciences and critical zone sciences. This session aims to bring together scientists from the climate- and soil-biogeosciences communities and to identify key shortcomings in current land surface models that need to be tackled through research and experimentation. Specifically, we welcome contributions that are already exploring the use of existing global datasets (based on in-situ data, or derived from remote sensing) to advance soil model parameterization in land surface models, including those embedded in weather forecast or climate models.

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Co-organized by CL5/GM3
Convener: Anne Verhoef | Co-conveners: Roland BaatzECSECS, Teamrat Ghezzehei, Dani Or, Pier-Luigi Vidale
SSS8.4 | PICO

The volcanic transitional landscape (VTL) has unique characteristics since the surface soil and sub-surface soil has developed from different soil parent materials. The land surface morphology is usually similar to the younger volcanic landscape so in most cases it will be grouped in that landscape. However, since the underneath materials are coming from other landscape systems, the TVL needs special treatment of soil resources management. Under the monsoonal climate condition, the TVL is usually suffered by erosion and landslide due to slope, soil thickness, and heavy clay soil texture. Formation of deep soil cracks during dry season has made the rainwater penetrates into the deep soil layer which consists of sensitive and collapsible clay.

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Co-organized by GM3
Convener: Junun Sartohadi | Co-conveners: Udo Nehren, Nur Ainun Harlin Jennie Pulungan
SSS3.3

For the rationalization of research in any natural science, there is no other way than to rely on taxonomy as developed as possible, and so it is with soil science. Moreover to extrapolate results and to publish any research carried out on a soil requires offering the name of that soil, as one more piece of the study area. With the classification of the soil and its spatial distribution, we can eventually gain information on 1) soil genesis and dynamics of the land systems, 2) soil sensitivity and resilience for degradation and other soils threats, 3) the potential and limitations for land use, and 4) in addition climate change.
The session is proposed to bring together papers focussing on international soil classification systems. A special focus is given to the third edition (2014) of the international soil classification system World Reference Base for Soil Resources (WRB). This symposium welcomes papers focussing on soil classification systems such as WRB (3rd ed, 2014) or Soil Taxonomy, either or not linked with national classification approaches.
Presenters may show how they use soil classification and soil maps to derive understanding and information. Experiences may be shared on how soil classifications are used and possibly linked to processes of digital soil mapping and novel soil survey techniques such as proximal sensing technologies, and detailed digital elevation models.

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Co-organized by GM3
Convener: Tiina TörmänenECSECS | Co-conveners: David Badía-Villas, Stephan Mantel

GM4 – Hillslopes, Catchments and Landscape

GM4.1

Landslide magnitude often refers to the probabilistic component of landslide hazard. Landslide magnitude may consider the size or the intensity of a landslide as an expression of its destructive power. Landslide magnitude estimation is a fundamental step for a proper landslide hazard and risk assessment. Due to the large variability and heterogeneity of landslide processes, no standard quantities, approaches, or methods have been widely adopted in the scientific/technical literature to estimate landslide magnitude. Indeed, while for other natural hazards, instrumental measurements provide the base to quantify or estimate the energy mobilized during the phenomena occurrence, for landslides this has been done only in a limited number of cases. Magnitude estimation over large areas is even more complex and often specific landslide features, such as size statistics (e.g. area, volume, etc.) or landslide counts over a spatial (e.g. the number of landslides in an area) or a temporal domain (e.g. the number of landslides in a day), are used as proxies of landslide magnitude.
We invite contributions addressing: (i) the use of different physical process characteristics to quantify landslide magnitude (ii) the use of different methods to estimate/quantify landslide magnitude over single hillslope or over large areas, (iii) the use of proxies in place of physical landslide characteristics to estimate/quantify landslide magnitude in place and time, (iv) the use of different methods to quantify the uncertainties when estimating landslide magnitude, (v) application of such methods in a ranges of conditions from subaerial to submarine processes.

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Co-organized by NH3
Convener: Mauro Rossi | Co-convener: Oded Katz
GM4.2

Erosion and sedimentation processes dominate mountain landscapes over a wide range of temporal and spatial scales. Signals from processes such as glacial and periglacial erosion, chemical weathering and mechanical weathering (i.e. progressive failure through cyclic and static fatigue), rockfall, debris flow, and hillslope failure are preserved in downstream patterns of river and/or valley aggradation and incision. These processes react to a wide spectrum of external and internal forcings (e.g. climatic variability, seismic activity or sudden internal failure) often making it difficult to relate these records back to specific causal mechanisms.

Measuring the dynamical interplay of erosion and sedimentation as well as quantification of rates and fluxes associated with landscape evolution in mountainous environments is a crucial but challenging component of source-to-sink sediment research. Furthermore, with many of these processes posing a serious threat to mountain settlements and infrastructure, they need to be understood and quantified for a better preparation from both a societal and engineering point of view.

We welcome contributions investigating the processes of production, mobilisation, transport, and deposition of sediment in mountain landscapes; the role these processes play in the larger source-to-sink context; or how they contribute to natural hazards specific to mountain environments. We invite presentations that focus on conceptual, methodological, or modelling approaches or a combination of those in mountain environments across a variety of timescales. We particularly encourage early career scientists to apply for this session.

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Co-organized by NH3/SSP3
Convener: Luca C MalatestaECSECS | Co-conveners: Larissa de PalézieuxECSECS, Elizabeth DingleECSECS, Stefan HaselbergerECSECS
GM4.3

Land cover plays a key role for geomorphic processes in steep-land environments. It exhibits both beneficial and adverse effects on hillslope denudation and substantially influences landscape evolution. Land cover information becomes of fundamental importance in many applications for assessing soil erosion loss and landslide activity at difference scales, from local to global analysis. Apparent land cover of a landscape affects the accuracy of most investigations that aim to detect, observe, analyse, model or predict geomorphic and landform-shaping processes. In contrast, denudational processes have a strong impact on both natural ecosystems and cultivated land, leading from increasing environmental diversity to economic damages.
This session is designed to cluster the most recent scientific researches on the analyses, modelling and prediction of soil erosion and landslide processes that are directly linked to land cover dynamics. Such variations can alter the soil properties as soil reinforcement and soil aggregation, and make the modelling and prediction of higher complexity.
Studies that pay heed on the impact of land cover changes on shallow or deep-seated and transient or long-term slope instabilities as well as surface water flow and related soil erosion processes are welcome. Research abstracts are invited to address:
1. observation and detection of different land cover types, land use changes and occurrences of erosion or landslides using a wide spectrum of technologies, from field measurements to remote sensing techniques;
2. analyses on the relationship between land cover and geomorphic processes from local to regional scale;
3. prediction of impacts on surface water flow, erosion and slope stability due to land cover changes;
4. innovative modelling approaches for assessing soil instabilities (statistical, physically-based, numerical) that focus on model implementation, parameterisation, uncertainties and simulation of land cover evolution;
5. development of guidelines and regulations for practitioners, technicians, policy and decision makers.
We highly welcome pioneering research from all fields, especially from geomorphology, agricultural science, soil science, geotechnics and environmental engineering. In particular, young career scientists are encouraged to contribute to the session with original and advanced studies.

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Co-organized by SSS2
Convener: Elmar SchmaltzECSECS | Co-conveners: Alessio CislaghiECSECS, Stefan StegerECSECS
GM4.4 | PICO

A key goal within geomorphic research is understanding the processes linking topographic form, erosion rates, and sediment production, transport and deposition. Numerical modelling, by allowing the creation of controlled analogues of natural systems, provides exciting opportunities to explore landscape evolution and generate testable predictions.

In this session, we invite contributions that use numerical modelling to investigate landscape evolution in a broad sense, and over a range of spatial and temporal scales. We welcome studies using models to constrain one or more of: erosion rates and processes, sediment production, transport and deposition, and sediment residence times. We also particularly wish to highlight studies that combine numerical modelling with direct Earth surface process monitoring techniques, such as topographic, field, stratigraphic, or geochronological data. Contributions using numerical models to unravel the interaction between environmental variables such as precipitation and lithology are further encouraged. There is no geographical restriction: studies may be focused on mountain environments or sedimentary basins, or they may establish links between the two. Studies beyond planet Earth are welcome too.

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Co-organized by SSS10
Convener: Fiona ClubbECSECS | Co-conveners: Benjamin CampfortsECSECS, Boris GailletonECSECS, Kimberly HuppertECSECS, Jörg Robl
GM4.5

Denudation, including both chemical and mechanical processes, is of high relevance for Earth surface and landscape development and the transfer of solutes and sediments from headwater systems through main stem of drainage basin systems to the world oceans. Denudational hillslope and fluvial processes and associated source-to-sink fluxes and sedimentary budgets are controlled by a range of environmental drivers and can be significantly affected by climate change and anthropogenic activities.
The better understanding of possible effects of ongoing and accelerated environmental changes on present-day denudation requires systematic and quantitative studies on the actual drivers of denudational processes. Only if we have an improved quantitative knowledge of drivers and rates of contemporary denudational hillslope and fluvial processes as well as of the connectivity in landscapes and between hillslope and fluvial systems across a range of different spatio-temporal scales and selected climatic zones, possible effects of global climatic changes (e.g., increased frequencies, durations and intensities of dry spells, droughts, storms, extreme rainfall events and floods, accelerated permafrost thawing, rapid glacier retreat), anthropogenic impacts and other disturbances (e.g., land use, mineral exploration, mining exploitation, fires, earthquakes) on terrestrial landscape systems can be better assessed. Special focus should be given to selected cold climate, temperate, arid and tropical regions that are expected to react particularly sensitive to ongoing and accelerated environmental changes.
This session invites scientific contributions on denudational hillslope and fluvial processes, mass transfers, sedimentary budgets and landscape responses to ongoing and accelerated environmental changes in different climatic zones. Oral and poster contributions can cover a wide range of different spatial scales, from hillslope and small headwater systems to large drainage basin systems. The session shall bring together and discuss a wide range of advanced techniques and methods of data collection and generation, including field-based, laboratory-based, remotely-sensed and dating techniques together with various approaches and methods of data analysis and geomorphologic modelling.

The session is organized by the IAG Working Group on Denudation and Environmental Changes in Different Morphoclimatic Zones (DENUCHANGE).

Solicited speaker: Edgardo M. Latrubesse (Singapore)

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Co-organized by HS13/NH10, co-sponsored by IAG
Convener: Achim A. Beylich | Co-conveners: Katja Laute, Ana Navas, Olimpiu Pop, Zbigniew Zwoliński
ITS3.4/GM4.6

In recent years, parallel developments in disciplines such as Geomorphology, Ecology, Neuroscience, Social Science and Systems Biology have focused on connectivity. Connectivity is a transformative concept in understanding complex systems, allowing unprecedented analysis of how such systems behave in terms of scaling, catastrophic/phase transitions, critical nodes, emergence and self-organization. In this session, we seek contributions where theoretical and practical advances in connectivity is being made within the physical sciences. Examples include learning from other disciplines, for instance by exploring the relations and dynamics between structural and functional connectivity and their wider application, and how to generate abstractions of specific systems so that connectivity tools can be employed. Contributions may focus on (i) Developing the theoretical underpinning of connectivity science for applications in complex systems; (ii) Developing methods and approaches in connectivity science that can be applied across disciplines; (iii) Exploring applications of connectivity science to understand, adapt to and manage complex systems and address real-world challenges in the physical sciences.

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Co-organized by NP8/SSS12
Convener: Laura Turnbull | Co-conveners: Thomas Hein, Rebecca Hodge, Tony Parsons, Ronald PöpplECSECS
NH3.10

In many parts of the world, landslide phenomena are a direct response to rapid environmental changes caused by global warming, human influences or other natural or technological hazards. The development of methods and strategies to evaluate hazard and risk posed by different types of landslides with different magnitudes in different environments has significantly progressed in the last decades due to rapid advance of computational and monitoring technologies. However, prognostic hazard and risk evaluations are highly challenged by the fact that local and regional environmental and meteorological conditions are subjected to rapid changes due to global warming and its consequences, modifying the local terrain susceptibility to landslides. Additionally, global change leads to significant changes in patterns of objects-at-risk due to population changes and concurring infrastructural developments.
This session aims to collect papers dealing with the advancement of methods and strategies for the prognostic spatio-temporal development of landslide hazard and risk scenarios and potentials in times of rapid global environmental change. Contributions dealing with the preparation and use of event-based landslide inventories for landslide hazard scenario assessments are welcomed as well as papers describing new advancements in process-oriented techniques for landslide hazard modelling at different spatial scales. Of particular interest are contributions concerned with the assessment of changing patterns of landslide-related risk posed to developing population and infrastructure in times of rapid environmental change.

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Co-organized by GM4
Convener: Paola Reichenbach | Co-conveners: Andreas Günther, Mihai Micu
NH3.2

Rockfalls, rockslides and rock avalanches are fundamental modes of erosion on steep hillslopes, and among the primary hazards in steep alpine terrain. To better understand the processes driving rock slope degradation, mechanisms contributing to the triggering, transport, and deposition of resulting rock slope instabilities, and mitigation measures for associated hazards, we must develop insight into both the physics of intact and rock mass failure and the dynamics of transport processes. This session aims to bring together state-of-the-art methods for predicting, assessing, quantifying, and protecting against rock slope hazards. We seek innovative contributions from investigators dealing with all stages of rock slope hazards, from weathering and/or damage accumulation, through detachment, transport and deposition, and finally to the development of protection and mitigation measures. In particular, we seek studies presenting new theoretical, numerical or probabilistic modelling approaches, novel data sets derived from laboratory, in situ, or remote sensing applications, and state-of-the-art approaches to social, structural, or natural protection measures.

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Co-organized by GM4
Convener: Michael Krautblatter | Co-conveners: Axel Volkwein, Anne VoigtländerECSECS, Matthew WestobyECSECS, Andreas EwaldECSECS
NH3.8

This session will provide an overview of the progress and new scientific approaches for investigating landslides using Earth Observation (EO), close-range Remote Sensing (RS) techniques as well as of surface- and borehole-based geophysical surveying.

We invited distinguished professor Jonathan Chambers, team leader of the geophysical tomography cluster at the British Geological Survey, as guest speaker for this session.

New scientific opportunities to investigate –and better understand- landslide dynamics worldwide is being driven by a series of remarkable technological progress during the last decade, including integrated information about geometry, rheological properties, water content, rate of deformation and time-varying changes of these parameters is ultimately controlling our capability to detect, model and predict landslide processes at different scales (from site specific to regional studies) and over multiple dimensions (2D, 3D and 4D).

This session welcomes innovative contributions and lessons learned from significant case studies and innovative methods using a myriad of techniques, including optical and radar sensors, new satellite constellations (including the emergence of the Sentinel-1A and 1B), Remotely Piloted Aircraft Systems (RPAS) / Unmanned Aerial Vehicles (UAVs) / drones, high spatial resolution airborne LiDAR missions, terrestrial LIDAR, Structure-from-Motion (SfM) photogrammetry, time-lapse cameras, multi-temporal Synthetic Aperture Radar differential interferometry (DInSAR), GPS surveying, Seismic Reflection, Surface Waves Analysis, Geophysical Tomography (seismic and electrical), Seismic Ambient Vibrations, Acoustic Emissions, Electro-Magnetic surveys, low-cost (/cost-efficient) sensors, commercial use of small satellites, Multi-Spectral images, etc.

A special emphasis is expected not only on the real-time collection but also on the digesting and interpretation when using high spatiotemporal resolution datasets to characterize the main components of slope stability and dynamics, especially with regard to their use on (rapid) mapping, characterizing, monitoring and modelling of landslide behaviour, as well as their integration on real-time Early Warning Systems and other prevention and protection initiatives. Other pioneering applications using big data treatment techniques, data-driven approaches and/or open code initiatives for investigating mass movements using the above described techniques will also be very welcomed.

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Co-organized by ESSI1/GI6/GM4
Convener: Antonio Abellan | Co-conveners: Janusz Wasowski, Masahiro Chigira, Oriol Monserrat, Jan BurjanekECSECS
SSS9.10

According to the Global Wildfire Information System, every year approximately 350 million hectares of land are affected by wildfires. This global phenomenon is responsible for substantial environmental, social and economic losses, which together with land abandonment, droughts, absence of appropriate land management and urban development planning, are expected to aggravate land degradation. In addition, wildfires are becoming a persistent threat, since the fire risk is expected to increase in a context of a warmer and drier climate.
This increased land degradation as a consequence of wildfires has also been highlighted in the latest Climate Change and Land, IPCC special report on climate change, desertification, land degradation, sustainable land management, food security, and greenhouse gas fluxes in terrestrial ecosystems. The impacts of wildfires on soils and ecosystems severely affect ecosystem services supply such as raw material and water provisioning, carbon storage, erosion and flood control, and habitat support, which are essential for human life. Therefore, attention of researchers, stakeholders and decision makers worldwide is urgently needed.
The aim of this session is to join researchers that study the effects of wildfires on ecosystems from wildfire prevention to post-fire mitigation. We warmly invite studies that approach:
i. prescribed and/or experimental fires;
ii. fire severity and burn severity;
iii. fire effects on vegetation, soils and water;
iv. post-fire hydrological and erosive response;
v. post-fire management and mitigation;
either by means of laboratory, field experiments, and/or numerical modelling.

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Co-organized by GM4/NH7
Convener: Diana VieiraECSECS | Co-conveners: Jantiene BaartmanECSECS, Marcos FrancosECSECS, Paulo Pereira
NH3.7

Landslides are ubiquitous geomorphological phenomena with potentially catastrophic consequences. In several countries, landslide mortality can be higher than that of any other natural hazard. Predicting landslides is a difficult task that is of both scientific interest and societal relevance that may help save lives and protect individual properties and collective resources. The session focuses on innovative methods and techniques to predict landslide occurrence, including the location, time, size, destructiveness of individual and multiple slope failures. All landslide types are considered, from fast rockfalls to rapid debris flows, from slow slides to very rapid rock avalanches. All geographical scales are considered, from the local to the global scale. Of interest are contributions investigating theoretical aspects of natural hazard prediction, with emphasis on landslide forecasting, including conceptual, mathematical, physical, statistical, numerical and computational problems, and applied contributions demonstrating, with examples, the possibility or the lack of a possibility to predict individual or multiple landslides, or specific landslide characteristics. Of particular interest are contributions aimed at: the evaluation of the quality of landslide forecasts; the comparison of the performance of different forecasting models; the use of landslide forecasts in operational systems; and investigations of the potential for the exploitation of new or emerging technologies e.g., monitoring, computational, Earth observation technologies, in order to improve our ability to predict landslides. We anticipate that the most relevant contributions will be collected in the special issue of an international journal.

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Co-organized by GM4
Convener: Filippo Catani | Co-conveners: Xuanmei Fan, Fausto Guzzetti, Binod Tiwari
SSS2.9

Restoring degraded landscape, managing soil and water resources are important for human well-being. Hillslope management and bioengineering, reforestation, and torrent control work using transverse structures, such as check dams and more recently open check dams, are becoming more common to mitigate soil erosion and torrential hazards. Such techniques are particularly important as they control the flux of water, sediments, nutrients, and other solutes from headwaters to downstream in any watershed management. The design and criteria of the check dams are also facing challenges due to complex hydrological, geological, and biological processes that affect water and sediment transport over a wide range of spatial and temporal scales. However, there are still lack of long term monitoring and sufficient understanding on the effects of soil and water conservation techniques on soil erosion processes, vegetation restoration, and torrential hazards control. Integrated watershed management also becomes increasingly crucial to mitigate the unprecedented impacts of environmental changes (e.g. climate, land-use changes). In this fourth consecutive year of organizing the session during EGU, we welcome studies that focus on soil conservation techniques from hillslopes to watershed scale. Any contributions to the understanding of soil erosion control and sediment transport management based on detailed field monitoring, high-quality laboratory works, mathematic models and effectiveness assessment methods are welcomed. In particular, we propose an approach to join and share scientific and technical studies from all around the world related to the legacy effects of check-dams and the potential of open check dams, highlighting the role of complex interactions between ecological elements, geomorphic processes and engineering activities.

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Co-organized by GM4/HS13
Convener: Yang YuECSECS | Co-conveners: Peng Li, Manuel Esteban Lucas-Borja, Guillaume PitonECSECS, Demetrio Antonio Zema
TS9.1

The consideration of entire “Source to Sink" systems is one of the most recent and challenging advance in earth surface dynamics and sedimentary geology. To understand S2S systems it is necessary to promote and enhance sharing of knowledge and concepts between previously separated disciplines that are involved in the analysis of S2S systems. In particular, studying S2S systems implies knowledge and skills from (1) geomorphology, which focuses on the understanding of erosion processes driving landform evolution and sediment fluxes, (2) stratigraphy/sedimentology, which focuses on the nature of sedimentary deposits and their distribution in time and space, and (3) tectonics and structural geology, which set the dimensions, geometry and dynamics of source/transfer areas and sedimentary basins (the sink). Understanding S2S systems also involves other Geosciences disciplines such as paleoclimatology and geochemistry, because they allow quantifying the factors controlling S2S systems dynamics (climatic controls on erosion, solid vs solute fluxes, etc.). The sedimentary record captures Earth’s environmental evolution through interactions with humans. Developing innovative strategies for shaping a sustainable future and responsible growth requires a holistic understanding of Earth’s resources and our impact on the environment that can be informed by the sedimentary archives.
The aim of this general session is to invite contributions from all S2S-related research fields in order to foster connections around a central theme and kickstart the emergence of a European S2S research community. In addition, we propose to use this session to initiate discussion on developing a strategy for S2S training of early-stage researchers to enable them to address the sedimentary system from source to sink and inform them of potential career opportunities in both the academic and non-academic sectors. We welcome all S2S-related and environmental signal propagation contributions, and in particular those addressing 1) perennial S2S dynamics in response to long-term tectonic and climatic signals in deep time, 2) transient S2S dynamics in response to short-term signals and extreme events, 3) generic S2S models inspired by nature, 4) relationships and feedbacks between human and S2S systems, 5) global to regional scale source-to-sink systems and the economic benefits of thinking in this mindset, and 6) innovative S2S training in academia and industry.

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Co-organized by GM4/SSP3, co-sponsored by IAS
Convener: Francois Guillocheau | Co-conveners: Jean Braun, Charlotte FillonECSECS, Benjamin Gréselle, Tor Somme
SSS8.7

Spatial patterns of vegetation, soils and landforms are recognized as sources of valuable information that can be used to infer the state and function of ecosystems. Complex interactions and feedbacks between climate, soils and biotic factors are involved in the development of soil-vegetation organization, and play an important role in making ecosystems resilient to disturbances. In addition, large shifts in the organization of vegetation and soils are associated with land degradation, frequently involving thresholds of ecosystem stability and nonlinear responses to both human and climatic pressures. The present context of changes in both climate and land use imposes an urgent need for understanding the processes linked to the organization of vegetation and coevolving soils and landforms. This session will focus on ecogeomorphological and ecohydrological aspects of landscapes, conservation of soil resources, and the restoration of ecosystem functions. We welcome theoretical, modelling and empirical studies addressing the organization of vegetation and coevolving soils and landforms, and particularly, contributions with a wide appreciation of the soil erosion-vegetation relationships that rule the formation of landscape-level spatial patterns. We also welcome studies describing the implications of these spatial patterns of soils and vegetation for the resilience and stability of ecosystems under the pressure of climate change and/or human disturbances.

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Co-organized by GM4
Convener: Jose Rodriguez | Co-conveners: Mariano Moreno de las Heras, Patricia Saco
SSS8.10

The critical zone comprises a constant feedback system between climate, topography, parent material and biota. Its complex interactions not only regulate manifold ecosystems, but also shape the Earth’s surface. Soils form at this interface between atmosphere and lithosphere, sustaining terrestrial and aquatic biogeochemical cycles. Climate has a strong effect on soil properties via biological and hydrological processes, as changing water availability and thus vegetation affects soil physical and chemical properties. Topography is also an essential factor in soil formation through its influence on the redistribution of solutes and particles. Even though the underlying geology and tectonic processes have long been recognised as driving parameters for long term soil and landscape development, this is much less so for biological processes. The driving force of microorganisms, plants and animals on the formation of soils and the shape of land surfaces is still poorly understood.

Recent interdisciplinary research efforts attempt to close these scientific gaps. This session aims to bring together geoscientists, soil scientists and biologists working at different spatial and temporal scales on how soils, topography and particularly soil flora and fauna affect landscape development, erosion control and thus form the Earth’s surface. The session will cover a multitude of topics such as bio-mediated redistribution of material in the weathering zone, biotic influence on sediment fluxes and erosion, the influence of micro-biota as a driver of weathering, the depositional legacy of coupled biogenic and geological systems and/or new modelling approaches to bridge different spatial and temporal scales.

We strongly encourage early career scientists to present their research, ideas and new conceptual approaches, which will be discussed during the session.


Invited keynote speakers at this session are:

Alexia Stokes, French National Institute for Agricultural Research – INRA, France
&
Veerle Vanacker, University of Louvain, Belgium

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Co-organized by CL4/GM4
Convener: Steffen SeitzECSECS | Co-conveners: Annegret LarsenECSECS, Carsten W. Mueller, Kirstin ÜbernickelECSECS
NH3.1

Large slope instabilities have been recognised in mountainous areas in different lithological and geological domains, and on other planets. Slow to extremely fast moving, complex mass movements have been recognized and sometimes described as strongly interrelated. Many types of slope instabilities can be grouped within this broad class, each presenting different types of hazard and risk. Some major aspects of these slope instabilities are still debated:
- regional distribution and relevance;
- presence, distribution and significance of phenomena on other planets;
- triggering and controlling factors;
- dating of initial movements and reactivation episodes;
- style and state of past and present activity;
- passive and/or active control by structural-tectonic elements;
- hydrological boundary conditions;
- possible evolution and modelling;
- assessment of related hazard;
- influence of anthropogenic factors and effects on structures;
- role on the erosional and sediment yield regime in drainage catchments and mountain belts;
- technologies for monitoring and warning systems, and the interpretation of monitoring data.
Study of these instabilities involves geology, geomorphology, geomechanics, hydro-geochemistry, and geophysics. For landslides on other planets a few of these approaches can be adopted making more difficult the interpretation of the phenomena, the identification of triggerings and controlling factors.
Trenching and drilling can be used for material characterization, recognition of activity episodes, which can be combined with monitoring data for establishing of warning thresholds and systems.
Geophysical survey methods can describe both the geometrical and geomechanical characteristics of the unstable mass. Dating techniques can be applied to determine the age of movements. Modelling can be applied to evaluate instability and failure, triggering (rainfall, seismicity, volcanic eruption, deglaciation), failure propagation, collapse (rock avalanches, debris avalanches and flows), and secondary failures (rockfall, debris flows).
Different hydraulic and hydrologic boundary conditions and hydrochemistry are involved, both at failure and during reactivations. The impacts of such instabilities on structures and human activities can be substantial and of a variety of forms. Furthermore, the local and regional sediment yield could be influenced by the landsliding activity and different landslides (e.g. type, size) can play different roles.

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Co-organized by GM4
Convener: Giovanni Crosta | Co-conveners: Federico Agliardi, Masahiro Chigira, Fabio Vittorio De BlasioECSECS
EMRP1.4

Rock deformation at different stress levels in the brittle regime and across the brittle-ductile transition is controlled by damage processes occurring on different spatial scales, from grain scale to fractured rock masse. These lead to a progressive increase of micro- and meso-crack intensity in the rock matrix and to the growth of inherited macro-fractures at rock mass scale. Coalescence of these fractures forms large-scale structures such as brittle fault zones and deep-seated rock slide shear zones. Diffuse or localized rock damage have a primary influence on rock properties (strength, elastic moduli, hydraulic and electric properties) and their evolution across multiple temporal scales spanning from geological times to highly dynamic phenomena as earthquakes, volcanic eruptions and landslides. In subcritical stress conditions, damage accumulation results in brittle creep processes key to the long-term evolution of geophysical, geomorphological and geo-engineering systems.

Damage and progressive failure processes must be considered to understand the time-dependent hydro-mechanical behaviour of faults (e.g. stick-slip vs asesismic creep), volcanic systems and slopes (e.g. slow rock slope deformation vs catastrophic rock slides), as well as the response of rock masses to stress perturbations induced by artificial excavations (tunnels, mines) and static or dynamic loadings. At the same time, damage processes control the brittle behaviour of the upper crust and are strongly influenced by intrinsic rock properties (strength, fabric, porosity, anisotropy), geological structures and their inherited damage, as well as by the evolving pressure-temperature with increasing depth and by fluid pressure, transport properties and chemistry. However, many complex relationships between these factors and rock damage are yet to be understood.

In this session we will bring together researchers from different communities interested in a better understanding of rock damage processes and consequence. We welcome innovative contributions on experimental studies (both in the laboratory and in situ), continuum / micromechanical analytical and numerical modelling, and applications to fault zones, reservoirs, slope instability and landscape evolution, and engineering applications. Studies adopting novel approaches and combined methodologies are particularly welcome.

Invited speakers:
- Brian Collins  (U.S. Geological Survey)
-  Jérôme Aubry  (Ecole Normale Supérieure de Paris)

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Co-organized by GM4/NH3
Convener: Federico Agliardi | Co-conveners: David Amitrano, John BrowningECSECS, Marie ViolayECSECS, Christian Zangerl

GM5 – Riverine Geomorphology

GM5.1

Fluvial systems cover much of the Earth’s surface; they convey water, sediments, and essential nutrients from the uplands to the sea, intermittently transferring these materials from the river channel to the adjacent floodplain. The routing of sediment and water through the channel network initiates complex process-form interactions as the river bed and banks adjust to changes in flow conditions. Despite their ubiquity, little is known about the landform-driven morphodynamic interactions taking place within the channel that ultimately determine patterns of sedimentation and changes of channel form. Furthermore, an understanding of how these process-form interactions scale with the size of the fluvial system is also currently lacking. Recent technological advances now afford us the opportunity to study and to quantify these process-form interactions in detail across a range of spatial and temporal scales. This session aims to bring together interdisciplinary researchers working across field, experimental, and numerical modelling approaches who are advancing methods and providing new insights into: (i) sediment transport and morphodynamic functioning of fluvial systems, (ii) evaluating morphological change at variable spatial and temporal scales, such as at event vs. seasonal scales, and (iii) investigating the sedimentology of these river systems. We particularly welcome applications which investigate the morphodynamic response of fluvial systems in all types and sizes and we specifically would like to encourage submissions from early career researchers and students.

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Co-organized by HS13/SSP3
Convener: László BertalanECSECS | Co-conveners: Joshua Ahmed, Christopher HackneyECSECS, Eliisa Lotsari
ITS2.5/GM5.2

The world’s big rivers and their floodplains were central to development of civilization and are now home to 3 billion people. These river systems harbour some of the planet’s most diverse ecosystems, and are hot spots of resources, agriculture, trade and energy production. While it is clear that large rivers and their floodplains are precious resources, a number of anthropogenic stressors, including large-scale damming, hydrological change, pollution, introduction of non-native species and sediment mining, are posing a sustainability crisis. The scale of the challenge is so great that large-scale, and potentially irreparable, transformations may ensue in periods of years to decades, with ecosystem collapse being possible in some systems. Prioritizing the fate of the world’s great river corridors is imperative. This session will provide a platform for cross-disciplinary science to identify and address this challenge. We invite presentations on topics that identify the causes and drivers of changes to the hydrology, geomorphology and ecology of large river systems, as well as studies that present options for future sustainable management that recognise the particular characteristics and challenges of large rivers. We therefore encourage submissions from across the globe, and especially studies that integrate social and geophysical sciences.

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Co-organized by BG4/HS12/NH8
Convener: Stephen Darby | Co-conveners: Jim Best, Frances DunnECSECS
GM5.3

River systems have commonly been treated as longitudinally continuous systems, and restoration efforts have focused on increasing longitudinal connectivity by removing human-made dams and culverts. However, recent research highlights the widespread nature of natural longitudinal disconnectivity in river systems, such as beaver dams, log jams, lakes and wetlands. For example, at northern latitudes, mainstem lakes and wetlands are common; beaver dams are present in mountain and other headwater streams throughout North America and Eurasia; and log jams are prevalent in headwater and lowland streams in forested catchments. These and other forms of natural disconnectivity can have large spatial and temporal implications on ecological, geomorphic, hydrological and biogeochemical processes through buffering fluxes (e.g., plant propagules, water, sediment, and nutrients). This session welcomes submissions investigating multiple facets of natural disconnectivity in river systems and their potential implications on geomorphic, ecologic, hydrological, and biogeochemical processes across a wide range of spatial and temporal scales, as well as geographic environments. We encourage studies using field, experimental, modeling, and/or remote sensing techniques. We aim to create a diverse interdisciplinary session that reflects a broad range of research seeking to determine historical range of variability of disconnectivity, implications on multiple types of river processes (e.g., flow attenuation, sediment routing, nutrient spiraling/uptake, hydrochory, effects on channel form), and potential implications for river management and restoration.

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Co-organized by BG4/HS13
Convener: Lina Polvi Sjöberg | Co-conveners: Lovisa Lind Eirell, Ronald PöpplECSECS, Ellen Wohl
GM5.4

Geomorphology is full of examples of flows over complex topography, and being able to predict how the topography will affect the flow is essential for predicting a wide range of geomorphic processes. Standard hydraulic approaches typically assume that boundaries have a regular topography, but this is rarely the case in geomorphological applications. While standard approaches produce reasonable predictions in some cases, in others they cannot be applied or produce estimates with significant uncertainty. For example, in rivers using D84 (84th percentile of the grain size distribution) to represent channel roughness produces reasonable estimates of bulk flow, but this approach does not work in channels with other significant sources of roughness (e.g. bedrock, boulders, wood, rough channel walls).

In this session we invite submissions that explore the interactions between complex topography and hydraulics. Topics could include: new methods for measuring and modelling these interactions; new approaches to quantifying surface topography in order to describe the impact on the flow; new methods for predicting flow conditions. We welcome contributions that use field-, lab- or computer-based methods, and from across the range of geomorphology, including fluvial, aeolian, glacial and hillslope systems. We also encourage contributions from researchers at all career stages.

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Co-organized by HS13/SSP3
Convener: Rebecca Hodge | Co-conveners: Christopher HackneyECSECS, Dieter Rickenmann, Mark SmithECSECS
SSP3.5 | PICO

Sedimentary bedforms, and their depositional products, are the result of a complex interplay between the erosion, transport and deposition of grains under the action of a current - unidirectional, oscillatory, combined or multidirectional. Each sedimentary structure represents a palaeo-surface expression, and therefore they contain a record of the geomorphology driven by the flow conditions, provided that one understands how to invert and read this history.

Bedforms and related sedimentary structures are generated in a wide variety of environments, including: aeolian wind-driven transport, rivers, estuarine, lacustrine and deltaic settings, pyroclastic currents, sub- and pro-glacial environments, shorelines and continental shelves, offshore storms (tempestites), turbidity currents and subaqueous mass flows and deep-sea currents. Of particular interest are particle-laden density flows (e.g. pyroclastic flows, snow avalanches, rivers, turbidity currents) as they transport huge amounts of sediments across our planet and form some of the largest sediment accumulations on Earth.

This session invites contributions regarding all aspects of the complex interaction between flow and bedform dynamics, and their sedimentary structures, from their description to interpretation, and from modelling to experiments to field quantification. The session welcomes studies across differing spatial and temporal scales, from large-scale organisation patterns down to the grain-scale, as well as the palaeo-dynamic and morphodynamic aspects of control and feedback between flow, sediment transport and bedform evolution.

Contributions from field, laboratory, theoretical, and numerical approaches are invited to advance our knowledge of how to decipher the information contained in sedimentary bedforms, and help foster fruitful discussions between sedimentologists, geomorphologists, hydrologists, physicists and all researchers working on understanding bedform dynamics and their sedimentary products.

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Co-organized by GM5/HS13, co-sponsored by IAS
Convener: Anne BaarECSECS | Co-conveners: Maria Azpiroz-ZabalaECSECS, Guilhem Amin Douillet, Alice Lefebvre, Thaiënne van Dijk
HS1.1.2

Effective management of water in the environment is a global imperative, made all the more critical by growing, often anthropogenically driven, pressures.
Expanding human populations, land use change and increases in the frequency and magnitude of extreme weather events, bring an added urgency to the need for effective measurement of discharge in the world’s rivers.
To manage water resource availability and flood risk, while maintaining a water environment beneficial to ecology, requires accurate, reliable and timely river flow measurements. Increasingly, these measurements must also be delivered against a backdrop of diminishing resources, both human and financial.
The need therefore is for safe, resilient and cost-effective methods for the accurate and timely quantification of the discharge rate of the world’s rivers. These methods must be resilient to the impacts of major floods and other physical change factors, while retaining the sensitivity to allow accurate assessment of even the lowest of flows. To ensure the continued validity of long term records, and to allow for the detection of change in climatic and hydrological regimes, new methods must be demonstrated to introduce no systematic bias to results.
This session focuses on innovative methods for measuring river discharge, and welcomes contributions with an emphasis on measuring the extremes, dealing with difficult sites and conditions and ensuring consistency and continuity of results. Contributions are also invited which describe methods for effectively quantifying uncertainties associated with river discharge measurements.
Note: This session is complemented by a field-based short-course offering attendees the opportunity to observe and experience some of these tools and techniques in a river environment.

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Co-organized by GM5/NH1
Convener: Nick Everard | Co-conveners: Alexandre Hauet, Jérôme Le Coz, Mark Randall, Ida Westerberg
HS9.4

Obtaining quantitative information on the spatial pattern of soil redistribution during storms and on the spatial sources supplying sediment to rivers is required to improve our understanding of the processes controlling these transfers and to design effective control measures. It is also crucial to quantify the transfer or the residence times of material transiting rivers along the sediment cascade, and to reconstruct the potential changes in sources that may have occurred at various temporal scales. During the last few decades, several sediment tracing or fingerprinting techniques have contributed to provide this information, in association with other methods (including soil erosion modelling and sediment budgeting). However, their widespread application is limited by several challenges that the community should address as priorities.
We invite specific contributions to this session that address any aspects of the following:
• Developments of innovative field measurement and sediment sampling techniques;
• Soil and sediment tracing techniques for quantifying soil erosion and redistribution;
• Sediment source tracing or fingerprinting studies, using conventional (e.g. elemental/isotopic geochemistry, fallout radionuclides, organic matter) or alternative (e.g. colour, infrared, particle morphometry) approaches;
• Investigations of the current limitations associated with sediment tracing studies (e.g. tracer conservativeness, uncertainty analysis, particle size and organic matter corrections);
• Applications of radioisotope tracers to quantify sediment transit times over a broad range of timescales (from the flood to the century);
• The association of conventional techniques with remote sensing and emerging technologies (e.g. LiDAR);
• Integrated approaches to developing catchment sediment budgets: linking different measurement techniques and/or models to understand sediment delivery processes.

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Co-organized by GM5
Convener: Olivier Evrard | Co-conveners: Gema Guzmán, Hugh Smith
HS9.2 | PICO

Instrumentation and measurement are decisive for innovation and progress in fluvial hydraulics. Examples are the ‘acoustic revolution’ of the 90s, when affordable acoustic Doppler devices (ADVs / ADCPs) offered new insight into flow, turbulence and sediment transport on larger spatial scales. The last decade has seen improved image acquisition from autonomous devices (drones, boats, submarines) and image processing algorithms (e.g. structure from motion). More recently, advances in sediment and particle transport have been made possible using smart tracking devices with accelerometers, gyroscopes or GPS.
The widespread development of open-source electronic prototyping platforms like Arduino or RaspberryPi enable a new generation of researchers to create their own electronic and mechatronic measurements devices. Flexible, customized sensor development and the availability of low-cost electronics has a huge innovation potential for fluvial hydraulics. The PICO session will bring together developers, users and scientists of these innovative new low-cost sensor technologies to showcase their applications and limitations in fluvial hydraulics.
Specifically, contributions in the following fields are encouraged:

• Smart sensors and technologies used for force, flow and concentration measurements
• Autonomous measurement devices (terrestrial, floating, submersible)
• Video and image processing, structure from motion, classification and tracking
• Physical particle tracking sensors and methods
• Lightweight sensors used in remote sensing on aerial vehicles

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Co-organized by GI6/GM5
Convener: Ingo Schnauder | Co-conveners: Nils Rüther, Jeff Tuhtan

GM6 – Coastal and Submarine Geomorphology

GM6.1

Coastal wetland ecosystems, such as salt marshes, mangroves, seagrass beds and tidal flats, are under increasing pressure from natural and anthropogenic processes shifting climatic conditions, and are declining in area and habitat quality globally. These environments provide numerous ecosystem services, including flood risk mediation, biodiversity provision and climate change mitigation through carbon storage. Hence, the need to get a deeper understanding of processes and interactions in these environments, and how these may be altered by climate change has never been greater. This is the case for ‘managed’, restored wetlands and natural systems alike.
This session will bring together studies of coastal wetland ecosystems across climates and geomorphic settings, to enhance the understanding of ecosystem service provisioning, interactions between hydrodynamics, sediment and ecology, and identify best future management practices. Studies of all processes occurring within coastal wetlands are invited. This includes, but is not exclusive to, sediment dynamics, hydrology, hydrodynamics, biogeochemistry, morphological characterisation, geotechnical analysis, bio-morphodynamics, ecological change and evolution, impact of climate change, sea level rise, anthropogenic and management implications. Multidisciplinary approaches across spatial and temporal scales are encouraged, especially in relation to global climate change. This session aims to enhance our understanding of basic processes governing coastal wetland dynamics and to propose sustainable management solutions for contemporary environmental pressures.

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Co-organized by BG4/HS13/OS2
Convener: Mark Schuerch | Co-conveners: Thorsten BalkeECSECS, Helen BrooksECSECS, Ruth Reef, Christian SchwarzECSECS
GM6.2

The world’s deltas support over 35 million people, yet account for only 0.5% of the Earth’s surface. They are highly productive regions supporting intensive agriculture, an extensive range of ecosystem services and high levels of biodiversity. Yet deltas and their inhabitants are facing myriad threats due to biodiversity loss, habitat degradation, sea-level rise, subsidence, sediment extraction and compaction, groundwater extraction and modifications of their upstream catchments. As such, deltas are sinking relative to sea level and with them the livelihoods and resources they currently support. Recent advances in satellite derived datasets, ground-based high-resolution monitoring, numerical modelling and socio-ecological systems understanding have enabled new insights to be gained as to how deltas and those ecosystems they support are responding to these threats. This session aims to bring together the state-of-the-science knowledge from a range of disciplines (geomorphology, hydrology, ecology, social sciences) to provide a holistic view of the response of deltas to climate change. We encourage submissions from all subject areas focussed on the world’s deltas to provide a broad session. We particularly encourage submissions from early career researchers.

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Co-organized by OS2
Convener: Christopher HackneyECSECS | Co-conveners: Rachael CarrieECSECS, Frances DunnECSECS, Grigorios VasilopoulosECSECS
GM6.3

Examining coastal morphodynamics from the nearshore through to inland dune systems is fundamental in understanding their short- to long-term behaviour. Coastal processes operate across large spatial and temporal scales and therefore comprehending their resulting landforms is complex.

At the coast, dunes provide the physical barrier to flooding during high energy storms, while beaches and nearshore areas help dissipate storm impact through a series of dynamic interactions involving sediment transfers and at times rapid morphological changes. Investigation of complex interactions between these three interconnected systems has become essential for understanding coastal behaviour.

This session, sponsored by the IGU-UGI Commission on Coastal Systems, welcomes contributions from coastal scientists interested in the measurement and modelling of the nearshore 25-0 m zone (waves, currents and sediment transport) and terrestrial coastal processes (on beaches and dunes) and responses within the three sub-units at various scales. The session will highlight the latest research developments in this part of the planet's geomorphic system and facilitate knowledge exchange between the submerged and sub-aerial coastal zones.

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Co-organized by OS2/SSP3, co-sponsored by CCS
Convener: Derek Jackson | Co-conveners: Irene Delgado-Fernandez, Emilia Guisado-Pintado
GM6.4

Coasts worldwide face a great variety of environmental impacts as well as increased anthropogenic pressures of coastal zone urbanization and rapid population growth. Over the last decade coastal erosion has emerged as a widespread problem that causes shoreline retreat and irreversible land losses. The attempts of managers and other stakeholders to cope with erosion using different types of hard engineering methods may often aggravate this problem, damaging natural landscape and coastal ecosystems in unexpected and unpredicted ways. Other negative impacts of human activities on littoral environments are chronic and punctual pollution of beach and coastal sediments with associated health risks for human beings. Chronic pollution is often observed in coastal areas close to factories, industries and human settlements - because of waste water discharges, punctual contamination is often linked to beach oiling.
The session gives priority to the subjects of coastal geomorphology: evolution of coastal landforms, coastal morphodynamics, coastline alterations and various associated processes in the coastal zone, e.g. waves and sediment drift, which shape coastal features and cause morphological changes. Contributions to this session will focus on the mechanisms responsible for coastal erosion and shoreline behaviour (advance or retreat) and will address the many natural and human factors involved. The topics may include work on predictions of shoreline change and discussions on the effects of human activities and their continuing contribution to coastal changes. The session will also cover submissions on coastal vulnerability to the combined effects of natural and human-related hazards, any type of coastal and environmental sensitivity classifications, and risk assessments. Globally, coastal dunes are seriously threatened as people tend to modify landforms and habitats through their actions and regulations, and the session invites also studies on natural and human-induced geomorphological changes of sand dunes, and recent projects and examples of dune eco-restoration and re-building.
Last, but not the least, studies related to Marine Spatial Planning (MSP), including Integrated Coastal Management (ICM), are also welcome. For any MSP and ICM, it is essential to consider the dynamics across the land-sea interface, i.e. the Land-Sea Interactions (LSI) that involve both natural processes and the impact of human activities.

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Co-organized by OS2, co-sponsored by CCS - IGU
Convener: Hannes Tõnisson | Co-conveners: Margarita Stancheva, Andreas Baas, Giorgio Anfuso, Guillaume Brunier
GM6.5

Sedimentary landforms play a critical role in defining the lives of human populations as they affect the flow of water and sediment across the landscape and the coast. They thus protect people and assets from flooding and erosion and are increasingly considered as part of ‘nature-based’ or ‘soft engineered’ flood and erosion protection approaches. Understanding how coastal sedimentary landforms evolve over different time-scales has preoccupied geomorphologists for many decades, but altered future environmental forcing requires knowledge of the stability of landforms in the face of a suite of climatic, biological, and chemical drivers in combinations or at magnitudes not yet encountered. Predicting how coastal landforms respond to combinations of such drivers (e.g. the changed frequency/magnitude of storm events) requires greater knowledge of their resistive properties at a range of scales, from landform response to extreme events and/or steadily shifting baselines (e.g. sea level rise) to the response of individual sediment grains embedded within the landform (e.g. to high-magnitude physical forcing by wind or water). Emerging technologies, such as space- and airborne remote sensing, digital imaging, data-logging and transmission of physical, biological, and chemical processes, are allowing new and unique perspectives on landform stability, but bring with them their own specific analytical and interpretative challenges.
This session adds a unique multi-disciplinary perspective to the challenge of understanding coastal landform stability by bringing together contributions from ecological, biogeochemical, geomorphological and sedimentological perspectives. We are committed to supporting early career researchers and this session should be of interest to practitioners working in the field of flood and erosion protection, particularly in the river and coastal context.

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Co-organized by OS2/SSP3
Convener: Iris Moeller | Co-conveners: Ben EvansECSECS, Simon J. Carr, Katherine Royse, Kate Spencer
SSP1.2

Directly observable relative sea-level (RSL) indicators (e.g. shore platforms, coral reef terraces, beach deposits, etc.) are used to constrain paleo sea levels and ice sheet extents and to improve GIA models and future projections of sea-level and ice-sheet responses. Biological proxies associated with and the physical characteristics of RSL indicators can be used to infer paleoclimate and together help inform climatic change and sea-level fluctuations throughout the Pleistocene. The preservation and distribution of these records assists in understanding regional earth surface processes following their deposition.

Recent advances in sea-level studies have called for increased spatiotemporal density of RSL indicators, including submerged and near-field localities, analyzed using standard definitions and methods. This session welcomes contributions to the global record of well-constrained Pleistocene sea-level indicators and associated proxies from a variety of coastal environments, not limited to peak interglacial periods. Re-interpretations of previously described records due to advancement in methods are also welcome.

This session falls within the purview of PALSEA (PALeo constraints on SEA level rise), a PAGES-INQUA Working Group, and the ERC-funded projects, WARMCOASTS and RISeR.

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Co-organized by CL4/GM6
Convener: Deirdre RyanECSECS | Co-conveners: Victor CartelleECSECS, Kim Cohen, Alessio Rovere
GM6.7

The ocean floor hosts a tremendous variety of forms that reflect the action of a range of tectonic, sedimentary, oceanographic and biological processes at multiple spatio-temporal scales. Many such processes are hazards to coastal populations and offshore installations, and their understanding constitutes a key objective of national and international research programmes and IODP expeditions. High quality bathymetry, especially when combined with sub-seafloor and/or seabed measurements, provides an exciting opportunity to integrate the approaches of geomorphology and geophysics, and to extend quantitative geomorphology offshore. 3D seismic reflection data has also given birth to the discipline of seismic geomorphology, which has provided a 4D perspective to continental margin evolution.

This interdisciplinary session aims to examine the causes and consequences of geomorphic processes shaping underwater landscapes, including submarine erosion and depositional processes, submarine landslides, sediment transfer and deformation, volcanic activity, fluid migration and escape, faulting and folding, and other processes acting at the seafloor. The general goal of the session is to bring together researchers who characterise the shape of past and present seafloor features, seek to understand the sub-surface and surface processes at work and their impacts, or use bathymetry and/or 3D seismic data as a model input. Contributions to this session can include work from any depth or physiographic region, e.g. oceanic plateaus, abyssal hills, mid-ocean ridges, accretionary wedges, and continental margins (from continental shelves to abyss plains). Datasets of any scale, from satellite-predicted depth to ultra high-resolution swath bathymetry, sub-surface imaging and sampling, are anticipated.

This session is organised by the IAG Submarine Geomorphology Working Group.

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Co-organized by OS4/SSP3, co-sponsored by IAG
Convener: Aaron Micallef | Co-conveners: Sebastian Krastel, Alessandra Savini
GM6.8

Detailed maps of the seabed, including substrate classification maps and comprehensive habitat maps, are used for a wide range of environmental, scientific and economic maritime applications. They provide a basic concept for ocean and coastal management, and serve as a cornerstone of national and international nature-conservation policy. Fundamental to seabed mapping are acoustic remote-sensing technologies which include singlebeam, multibeam and sidescan sonars along with interferometric and synthetic-aperture sonars. These are deployed on various platforms including manned/unmanned surface and underwater vessels. In relatively shallow and transparent waters optical methods such as aircraft and satellite-based remote sensing and lidar are employed with increasing success. Innovative processing and classification software, image analysis, machine and deep-learning applications are advancing developments in seabed-recognition techniques. The application of which increases the resolution and confidence in the resulting environmental maps produced. This session will provide insights into new developments, methods, and results in the field of seabed mapping and classification; showcasing a range of applications for these decisive datasets.

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Co-organized by OS2
Convener: H. Christian Hass | Co-conveners: Markus Diesing, Maria Judge, Kim Picard, Anne-Cathrin WölflECSECS
ITS2.4/HS12.1

This session provides a platform for cross-disciplinary science that addresses the continuum of the river and its catchment to the coastal sea. We invite studies across geographical borders; from the source to the sea including groundwater, and across the freshwater-marine water transition. The session welcomes studies that link environmental and social science, address the impacts of climate change and extreme events, and of human activities on water and sediment quality and quantity, hydromorphology, biodiversity, ecosystem functioning and ecosystem services of River-Sea systems, and that provide solutions for sustainable management of the River-Sea social-ecological system.
We need to fully understand how River-Sea-Systems function. How are River-Sea-Systems changing due to human pressures? What is the impact of processes in the catchment on marine systems function, and vice versa? How can we discern between human-induced changes or those driven by natural processes from climate-induced variability? What will the tipping points of socio-ecologic system states be and what will they look like? How can we better characterise river-sea systems from the latest generation Earth observation to citizen science based observatories. How can we predict short and long term changes in River-Sea-Systems to manage them sustainably? What is the limit to which it is possible to predict the natural and human-influenced evolution of River-Sea-Systems? The increasing demand to jointly enable intensive human use and environmental protection in river-sea systems requires holistic and integrative research approaches with the ultimate goal of enhanced system understanding.

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Co-organized by BG4/GM6/NH5/OS2/SSP3, co-sponsored by IAS
Convener: Jana Friedrich | Co-conveners: Debora Bellafiore, Andrea D'Alpaos, Panagiotis Michalopoulos, David Todd
NH5.5

Coastal areas are vulnerable to ocean, atmospheric and land-based hazards. This vulnerability is likely to be exacerbated in future with, for example, sea level rise, changing intensity of tropical cyclones, increased subsidence (e.g. from groundwater extraction, tectonics), and increasing socio-economic development coupled to coastal squeeze in, particularly, the urbanised low elevation coastal zone. This calls for a better understanding of the underlying physical processes and their interaction with the coast. Numerical models therefore play a crucial role in characterizing coastal hazards and assigning risks to them. Drawing firm conclusions about current and future changes in this environment is challenging because uncertainties are often large, such as coastal impacts of likely and unlikely (also called high-end) sea level changes for the 21st century. Furthermore, studies addressing coastal impacts beyond this century pose new questions regarding the timescale of impacts and adaptation activity.

This session invites submissions focusing on assessments and case studies at global and regional scales of potential physical impacts of tsunamis, storm surge, sea level rise, waves, and currents on coasts. We also welcome submissions on near-shore ocean dynamics and also on the socio-economic impact of these hazards along the coast.

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Co-organized by GM6/OS2
Convener: Luke JacksonECSECS | Co-conveners: Joern Behrens, Renske de WinterECSECS, Goneri Le Cozannet, Nicoletta LeonardiECSECS
NH5.3

Tsunamis and storm surges pose significant hazards to coastal communities around the world. Geological investigations, including both field studies and modelling approaches, significantly enhance our understanding of these events. Past extreme wave events may be reconstructed based on sedimentary and geomorphological evidence from low and high energy environments, from low and high latitude regions and from coastal and offshore areas. The development of novel approaches to identifying, characterising and dating evidence for these events supplements a range of established methods. Nevertheless, the differentiation between evidence for tsunamis and storms still remains a significant question for the community. Numerical and experimental modelling studies complement and enhance field observations and are crucial to improving deterministic and probabilistic approaches to hazard assessment. This session welcomes contributions on all aspects of paleo-tsunami and paleo-storm surge research, including studies that use established methods or recent interdisciplinary advances to reconstruct records of past events, or forecast the probability of future events.

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Co-organized by GM6/SSP3
Convener: Ed GarrettECSECS | Co-conveners: Dominik Brill, Max Engel, Simon Matthias May, Jessica Pilarczyk

GM7 – Glacial, Periglacial and Mountain Region Geomorphology

GM7.1

Present-day glacial and periglacial processes in cold regions, i.e. arctic and alpine environments, provide also modern analogues to processes and climatic changes that took place during the Pleistocene, including gradual retreat or collapse of ice sheets and mountain glaciers, and thawing and shrinking of low-land permafrost. Current geomorphological and glaciological changes in mid-latitude mountain ranges could also serve as a proxy for future changes in high-latitude regions within a context of climate change. Examples are speed-up or disintegration of creeping permafrost features or the relictification of rock glaciers.

For our session we invite contributions that either:
1. investigate present-day glacial and/or periglacial landforms, sediments and processes to describe the current state, to reconstruct past environmental conditions and to predict future scenarios in cold regions; or
2. have a Quaternary focus and aim at enhancing our understanding of past glacial, periglacial and paraglacial processes, also through the application of dating techniques.

Case studies that use a multi-disciplinary approach (e.g. field, laboratory and modelling techniques) and/or that highlight the interaction between the glacial, periglacial and paraglacial cryospheric components in cold regions are particularly welcome.

Keynote lectures:
Britta Sannel (Stockholm): Landscape dynamics in permafrost peatlands - past, present and uncertain future
Clare Boston (Portsmouth): The response of Østre Svartisen icefield, Norway, to 20th/21st Century climate change

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Co-organized by CL4/CR4
Convener: Andreas Kellerer-Pirklbauer | Co-conveners: Natacha Gribenski, Isabelle Gärtner-Roer, Sven Lukas
GM7.2

Mountain glaciations provide an invaluable record for past and present climate change. The utilization of this potential is, however, not trivial because of the wide diversity of formerly and currently glaciated mountain ranges. In addition to their dynamic, complex, and interacting geomorphological process-systems, the specific different climatic and glaciological conditions make any subsequent global or intra-hemispheric correlations incredibly challenging. This problem is further enhanced by ongoing specialisation within the scientific community. Working groups primarily focusing on either individual aspects or selected mountain regions often remain somewhat disconnected. Only if significant bridging between specialised research communities is guaranteed, progress with the understanding of the complex interactions within mountain ranges can be achieved.
The primary aim of this session is to evaluate the potential of mountain glaciations records and stimulate further research in this important field of research. Contributions on all relevant aspects of the topic are welcomed, for example: (a) glacial landforms and reconstruction of past glaciers, (b) dating techniques and geochronology compilations, (c) glacier dynamics and palaeoclimatic interpretations, or (d) impacts of ecosystems and human evolution/society. Submissions targeting these connections are specifically encouraged. While we encourage submitting abstracts from all abovementioned topics within the broad field of mountain glaciations, we would like to invite in particular those highlighting the specific conditions of mountain glaciations or addressing the relationship and connections between different of their aspects. To address the diversity of mountain glaciations, contributions from high-, middle-, and low-latitude mountain ranges as well as from continental to maritime regions are all welcomed. The time scale of the session will cover the whole time range from Early Pleistocene glaciations to the LGM and Holocene/modern glaciers.

During the past years, precursors of this session have steadily become more popular and attracted contributions from a wide range of research topics and study areas, both with a high diversity of methodological approaches. It has become a platform for everyone interested in the emerging collaborative research network “The Legacy of Mountain Glaciations” and given an opportunity to meet and exchange ideas and expertise.

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Co-organized by CR4/SSP2
Convener: Stefan Winkler | Co-conveners: Lauren KnightECSECS, Giovanni Monegato, Jürgen Reitner
GM7.3

Quaternary researchers require accurate knowledge of former ice positions for many topics, including the development of ice sheet models, along with the study of climate variability, paleo-sea levels, and past atmospheric circulation. A key interest is constraining the spatiotemporal pattern of recession experienced by global ice sheets following the Last Glacial Maximum (LGM) during Oxygen Isotope Stage 2. In recent years, significant refinements to geochronologic methods have allowed for an increasingly precise, empirically constrained, picture of glacial recession from this maxima. Notably, remote sensing based geomorphological studies, detailed field mapping, and geochronological improvements on both ice-derived and sub-aerial sediments have driven our increased understanding of past ice margin recession. Specifically, this has led to significant refinements to the recession of Stage 2 ice from Eurasian, North America and beyond. However, many gaps and uncertainties remain. In this session, we aim to continue this discussion by bringing together researchers from the interdisciplinary scientific community working on the empirical constraints on ice margin fluctuations from the Last Glacial Maximum to present day. We welcome studies on a variety of topics related to reconstructing glacial recession (e.g. glacial/geomorphic mapping, moraine chronologies, proglacial lake records, terrestrial sediment archives, drainage basin change, relative sea level change, and related methodological improvements). Our aim is to provide a forum in which field-based researchers can come together and discuss new data, and best “best practices” for refining ice sheet recession from the Last Glacial Maximum.

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Co-organized by CR1
Convener: April DaltonECSECS | Co-conveners: Anna L.C. Hughes, Samuel E. KelleyECSECS
CR1.4

The pre-Holocene history of the Greenland Ice Sheet remains fragmentary and poorly known. The behavior and response of the Greenland Ice Sheet to past climate change, particularly during warmer-than-present times, such as the Pliocene and Pleistocene super interglacials, offer insight into the potential future response of the ice sheet to rapid anthropogenic warming. We welcome submissions that present advances in deep time records of Greenland Ice Sheet process, behavior, and history using a broad range of tools including geophysical data, geochemical and isotopic analyses, paleoecological analyses, modelling studies, and interdisciplinary data sets.

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Co-organized by CL1/GM7
Convener: Andrew ChristECSECS | Co-conveners: Paul Bierman, Dorthe Dahl-Jensen, Paul Knutz, Elizabeth Thomas
CR2.2

Studies of ice extent, volume and dynamics during former glaciations are important for understanding past climates and evolution of the Earth’s surface, and also provide analogies for present-day ice sheets and their subglacial environments. This includes observations of glacial erosion, glacial transport and deposition of sediments, formation of fjords and their relation to ice streams, evidence for migration of ice divides, former locations of subglacial lakes, relations between high geothermal heat flow, basal ice melt and rapid ice flow, and other aspects of paleo glacier extent and behaviour. This session will bring together the interdisciplinary scientific community working on former ice covers from the perspectives of glacial geomorphology, quaternary geology, and numerical modeling. It will provide a forum in which field-based reconstructions and model-based simulations can be compared and contrasted. We particularly welcome contributions that shed light on ancient and more recent glaciations on Earth and their interaction with other components of the Earth System.

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Co-organized by GM7
Convener: Arjen Stroeven | Co-conveners: Jorge BernalesECSECS, Irina Rogozhina, Lev Tarasov, Eef van DongenECSECS
CR2.3

Formerly-glaciated areas are vital environments for understanding the rates of and processes of ice-mass retreat, providing analogues for improving our understanding of present-day ice masses and their response to recent and future climatic warming. Geological and geophysical records of formerly-glaciated margins on continental shelves and within large marine basins provide a wealth of landform, sediment and stratigraphic assemblages that reveal ice sheet flow and retreat dynamics over glacial-interglacial cycles. Most of the ice-sheets that produced these continental shelf archives were marine-based, grounded below sea level. These are some of the most dynamic and sensitive parts of the modern cryosphere, and are also amongst the hardest to predict the behaviour of, producing large uncertainties in predictions of future ice-sheet change in response to oceanic and atmospheric forcing.
The proliferation of geophysical technology and datasets, such as multibeam echosounder, high-resolution, 2D and 3D seismic and subsurface profiling, core logging coupled to sedimentology and palaeoenvironmental analyses, enable us to access sedimentological, stratigraphic and morphological archives of ice-ocean-sedimentary systems on formerly-glaciated continental shelves.
We invite papers on themes including past ice-flow dynamics in marine-based ice sheets, grounding line behaviour, palaeo-ice stream, shear margin and subglacial processes, the role of meltwater on glaciological systems, and on ice-ocean interactions, including ice shelf behaviour, as well as submerged archives from rarely occurring terrestrially-terminating ice sheets. Additionally, we strongly encourage contributions that develop and integrate multiple data types, and that couple geological and geophysical methods with numerical modelling of ice sheets.

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Co-organized by CL1/GM7
Convener: Andy EmeryECSECS | Co-conveners: Jeremy ElyECSECS, Mariana EstevesECSECS, Kelly Hogan, Stephen McCarron
CR4.4

The study of rapid permafrost degradation features such as thaw slumps on river shores, sea coasts and slopes in High Latitudes have increased in recent years with accelerated permafrost thaw, tundra and taiga fires and thermo-erosion driven by ongoing Arctic warming. Furthermore, thaw slumps measuring several hundred meter wide and several decameters deep known as ‘megaslumps’ have been identified in Siberia and Canada and introduced to the scientific literature within the last decade. The combination of thermal and erosional processes in ice-rich permafrost terrain promotes the release of organic matter, nutrients and trace elements into riverine and marine systems that certainly alters food webs and biogeochemical cycling. Ongoing research focuses (1) on modern thaw slumps dynamics monitored by onsite and remote sensing as well as geophysical methods, (2) on quality and quantity of released material and its impact on adjacent ecosystems, and (3) on still preserved Quaternary inventories of fossil organic matter and ground ice that are accessible in thaw slump headwalls. The session seeks to combine these main research directions to promote interdisciplinary approaches within the field of permafrost research.

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Co-organized by BG3/CL4/GM7
Convener: Sebastian Wetterich | Co-conveners: Alexandr Kizyakov, Thomas Opel, Trevor Porter, Melissa Ward JonesECSECS
CR4.1

The focus of this session is to exchange the latest understanding of the role of surface debris within glacier systems, and the role of debris-covered glaciers in landscape evolution.

We seek to cover topics including glacier debris sources and headwall erosion rates, glacier surface process influenced by debris, and how debris affect the whole glacier land system. Therefore we welcome contributions pertaining to the debris-covered glacier system: its interaction with the atmosphere and climate, melt patterns and runoff, and ice dynamics. We encourage contributions examining how debris-covered glaciers interact with the wider land system, for example, in terms of geohazards, erosion, sediment transport, and deposition.

We are happy to include the full range of methods used to investigate these systems, including remote sensing, numerical modelling, field observations and more.

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Co-organized by GM7
Convener: Adina Racoviteanu | Co-conveners: Evan MilesECSECS, Lindsey Nicholson
CR4.3

Glacial landscapes are constantly transforming in response to past and present climate and environmental conditions. Especially, due to past and present global warming, rapid changes in these landscapes are observed. These changes are associated with transitions from different processual states – glacial – periglacial – paraglacial, and associated morphologies and landforms (e.g. rock glaciers, debris- covered glaciers, protalus ramparts, etc.). To unravel and quantify these past and present evolutions, controls and feedbacks a broad spectrum of methods are available, like geomorphological mapping, dating, remote sensing, geophysics, numerical modelling, climate reconstruction and monitoring, etc. We invite all presentations with conceptual, methodological, or modelling approaches or combinations to better understand these states and transitions of glacial landscapes.
If you work on, e.g.
• transitions of glacial to periglacial or paraglacial landforms,
• geomorphometry of past and presently glaciated landscapes,
• processual studies of glacial, paraglacial and periglacial landscapes across all temporal and spatial scales
• conceptual frameworks of the evolution of glaciated landscapes and
• new methods and techniques which enable their quantification,
send your abstract NOW! Especially Early Career Scientists contributions are encouraged.

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Co-organized by GM7
Convener: Johannes BuckelECSECS | Co-conveners: Tobias Bolch, Anne VoigtländerECSECS, Jasper Knight, Darren Jones
ITS1.10/NH9.27

In this session, we invite contributions to explore diverse experiences with inter- and transdisciplinary research and practice, that is specifically applied in the mountain context. Taking mountains as complex social-ecological systems, they provide a concrete and spatially-defined contexts in which to explore how global change phenomena manifests and how it poses challenges and opportunities for communities and society in general.

Addressing societal concerns, and finding suitable solutions with regards to associated impacts of global change in mountains, requires and inter- and transdisciplinary (IT-TD) approach to research and practice. We invite contributions based on empirical research and/or practical experience with IT-TD, to critically reflect on these practices in the mountains context and learn from experiences that explicitly address societal grand challenges such as (but not limited to) climate change impacts and adaptation, transformations to sustainability, disaster risk reduction, or transitions to low carbon economies. We welcome contributions depicting research experiences in European mountain regions, other mountain regions around the world, as well as contributions from Early Career Researchers.

The session is led and coordinated by the Mountain Research Initiative (MRI) with expectations to be able to draw from this session as inputs for future research agendas and coordination of research collaborations in mountain regions, worldwide.

www.mountainresearchinitiative.org

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Co-organized by EOS4/CL4/CR7/GM7
Convener: Carolina Adler | Co-convener: Aino Kulonen
ITS5.9/EOS4.14

World-wide an increasing number of research projects focus on the challenges associated with permafrost thaw. Whereas these often have a natural and physical science focus, this session focuses on trans-disciplinary approaches to study the multiple phenomena associated with warming ground, especially but not exclusively in Arctic regions, and how to tackle these in large, trans-disciplinary research projects, initiatives and programs (e.g. HORIZON2020 Nunataryuk and the T-MOSAIC program of the International Arctic Research Council, NSF Navigating the New Arctic). Contributions are invited, but are not limited, to the following themes:
• science communication with local stakeholders, co-production of knowledge, risk perception,
• integration of social and natural science approaches in large research projects,
• (indigenous) approaches to adaptation and mitigation, equitable mitigation,
• socio-economic modelling in relation to permafrost thaw,
• examining the impacts of permafrost thaw on and health and pollution as well as infrastructure (and consequences of the built environment).

Invited speaker: Skip Walker (University of Alaska Fairbanks) – ‘Navigating the New Arctic: Adapting to infrastructure- and climate-related changes in ice-rich permafrost systems’

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Co-organized by CL4/CR4/GM7/HS12/NH9
Convener: Peter Schweitzer | Co-conveners: Annett Bartsch, Susanna GartlerECSECS
SSP3.21

Bedrock depressions are common features of past and modern glacial landscapes. They are often referred to as overdeepenings and act as important terrestrial archives. Which processes control the formation and geometry of glacial overdeepenings? How did they evolve over time? Which chronological and environmental information can be derived from the sedimentary record? These are the questions that will be addressed in this session.

The timing, extent and driving mechanisms for the last major glacial cycle are increasingly better understood but remain poorly constrained for previous cycles. The early conceptual models, initially adopted to understand older glaciations, neglected much of the spatial and temporal complexity of glaciations. Furthermore, they suffered from a lack of constraining data, which is mainly due to the surficial incompleteness of the terrestrial records.
Some of these limitations may be overcome by studying the sedimentary infill of subglacially formed basins. It is generally accepted that glacial processes, supported by subglacial water, have carved these overdeepenings. However, considerable uncertainties remain concerning the erosional mechanisms and physical constraints.
The sedimentary record in overdeepenings is diverse, including glacial, glacio-lacustrine and fluvial sediments. Investigated records suggest that many overdeepened basins contain a multi-cycle infilling and erosion history. Overdeepenings may therefore act as sediment storages on the timescale of several glacial-interglacial cycles, and provide a valuable record of a landscape’s glacial history. The combination of sedimentological, geophysical, and chronological methods together with the application of landscape evolution models provides new insights into the development of these bedrock features and allows constraining the environmental conditions in the geological past.

This session shall stimulate discussions concerning the formation of subglacial depressions and that aim at deciphering the sedimentary fill of overdeepenings. Contributions may include investigations based on field observations and/or modelling of modern, Quaternary and pre-Quaternary glacial settings. Possible topics cover: (a) glacial and interglacial stratigraphic successions preserved in overdeepenings, (b) subglacial erosion and deposition, (c) glaciation chronology, and (d) landscape evolution.

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Co-organized by CR4/GM7, co-sponsored by IAS
Convener: Michael SchwenkECSECS | Co-conveners: Marius BuechiECSECS, Thomas BurschilECSECS, Urs H. Fischer, Bernhard Salcher

GM8 – Aeolian and Dryland Geomorphology

GM8.1

Arid to sub-humid regions contribute ca. 40 % to the global land surface and are home of more than 40 % of the world’s population. During prehistoric times many important cultures had developed in these regions. Due to the high sensitivity of dryland areas even to small-scale environmental changes and anthropogenic activities, ongoing geomorphological processes but also the Late Quaternary palaeoenvironmental evolution as recorded in sediment archives are becoming increasingly relevant for geomorphological, palaeoenvironmental and geoarchaeological research. Dryland research is also boosted by methodological advances, and especially by emerging linkages with other climatic and geomorphic systems that allow using dryland areas as indicator-regions of global environmental change.
This session aims to pool contributions from the broad field of earth sciences that deal with geomorphological processes and different types of sediment archives in dryland areas (dunes, loess, slope deposits, fluvial sediments, alluvial fans, lake and playa sediments, desert pavements, soils, paleosols etc.) at different spatial and temporal scales. Besides case studies from individual regions and archives, methodical and conceptual contributions, e.g. dealing with the special role of eolian, fluvial, gravitational and biological processes in dryland environments, their preservation over time in the sedimentary records, and emerging opportunities and limitations to resolve past and current dynamics, are especially welcome in this session.

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Co-organized by CL4/SSP2
Convener: Hans von Suchodoletz | Co-conveners: Markus Fuchs, Joel Roskin, Abi Stone, Lupeng Yu
SSS11.3

Dryland areas cover 40 % of the world’s terrestrial surface, including regions classified as arid, semi-arid and dry sub-humid. These regions have become very sensitive to change and overuse of resources. A high variability of precipitation complicates the work of many dry farmers. A land use change from the traditional dry farming to irrigated agriculture is ongoing in NW Africa, overusing resources and leading to soil degradation, overgrazing and deforestation. This, in turn, has a major impact on geomorphodynamics in these sensitive ecosystems. Highly variable but intense rainfall and wind may lead to erosion and further degradation of the bare and sparsely vegetated soil which may e.g. lead to the formation of desert pavements.
This session aims to bring together contributions on recent geomorphodynamics in NW-African drylands that have been studied using different methods, e.g. experimental approaches (rainfall simulations, infiltration measurements, livestock trampling experiments, Gerlach troughs, rill experiments and more), soil analyses, or 2D and 3D mapping of soil and relief characteristics (e.g. ground-penetrating radar, GPR; unmanned aerial vehicles, UAVs/drones). Ultra-high resolution aerial photographs are particularly useful, since they can be used to develop degradation classifications over larger areas. Studies focussing on improvement or combination of established methods, on the development of new and exciting methods, and on better protection of the sensitive dryland regions are especially welcome.

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Co-organized by GM8
Convener: Johannes B. Ries | Co-conveners: Ali Ait Hssaine, Mario KirchhoffECSECS, Irene Marzolff, Oliver Sass
AS3.8 | PICO

The interactions between aerosols, climate, and weather are among the large uncertainties of current atmospheric research. Mineral dust is an important natural source of aerosol with significant implications on radiation, cloud microphysics, atmospheric chemistry and the carbon cycle via the fertilization of marine and terrestrial ecosystems.
In addition, properties of dust deposited in sediments and ice cores are important (paleo-)climate indicators.

This interdivision session is open to contributions dealing with:
(1) measurements of all aspects of the dust cycle (emission, transport, deposition, size distribution, particle characteristics) with in situ and remote sensing techniques,
(2) numerical simulations of dust on global and regional scales,
(3) meteorological conditions for dust storms, dust transport and deposition,
(4) interactions of dust with clouds and radiation,
(5) influence of dust on atmospheric chemistry,
(6) fertilization of ecosystems through dust deposition,
(7) any study using dust as a (paleo-)climate indicator including investigations of Loess, ice cores, lake sediments, ocean sediments and dunes.

We especially encourage to submit papers on the integration of different disciplines and/or modeling of past, present and future climates.

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Co-organized by BG1/CL4/GM8/SSP3, co-sponsored by ISAR
Convener: Jan-Berend Stuut | Co-conveners: Paola Formenti, Joanna Nield, Claire Ryder, Mingjin TangECSECS

GM9 – Volcanic and Tectonic Geomorphology

GM9.1

The coupling between tectonics, climate and surface processes governs the dynamics of mountain belts and basins. First order constraints on this coupling are provided by geomorphic and sedimentary records, including longitudinal river profiles, fluvial terraces, downstream fining trends, growth strata, sediment provenance, sequence stratigraphy, and changing depositional environments. Moreover, the increasing integration of geochronological methods for quantifying erosion rates and source-to-sink sediment transfer with landscape evolution, stratigraphic, climatic, and tectonic models allows to advance our understanding of the interactions between surface processes, climate and tectonic deformation.

We invite contributions that use geomorphic and/or sedimentary records to understand tectonic deformation, climate histories, and surface processes, and welcome studies that address their interactions and couplings at a range of spatial and temporal scales. In particular, we encourage coupled catchment-basin studies that take advantage of numerical/physical modelling, geochemical tools for quantifying rates of surface processes (cosmogenic nuclides, low-temperature thermochronology, luminescence dating) and high resolution digital topographic and subsurface data. We also encourage field or subsurface structural and geomorphic studies of landscape evolution, sedimentary patterns and provenance in deformed settings, and invite contributions that address the role of surface processes in modulating rates of deformation and tectonic style, or of tectonics modulating the response of landscapes to climate change.

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Co-organized by TS9
Convener: Dirk Scherler | Co-conveners: Anneleen Geurts, Duna Roda-BoludaECSECS, Alex Whittaker
GMPV9.10

Remote sensing measurements, from passive optical to active radar sensors, have become classical techniques to study and monitor Earth’s active volcanoes and the related hazards. They are commonly used by many volcano observatories and scientists around the World as obvious monitoring tools and complements to other ground-based geophysical techniques, such as GNSS, seismic, infrasound and gravimetric monitoring networks.

Nowadays, the number of satellite images available at no charge for scientific purpose and the number of earth observation missions are still increasing. New low-cost approaches, such as micro-satellite constellations and Unmanned Aerial Systems (UAS), are in constant development. The traditional trade-off between spatial and temporal resolutions tends to disappear. Both spectral resolution and and spatial coverage are increasing. All these types of evolution make volcano remote sensing more accurate and comprehensive than before, allowing the scientists to better decipher the volcanic activity and the associated underlying magmatic processes.

In the present session, we invite all contributions that deal with the study and monitoring of active volcanoes and their related hazards, using recent imaging sensors on-board space-, air- or ground-based platforms. Targeted remote sensing techniques are essentially –but not restricted to– ground surface deformation, topographic changes, ash and gas emissions, thermal detection, spatial and temporal measurements, and 2D/3D mapping. Research based on time-series datasets processing and modelling, complementary remote sensing approaches and/or the combination of remote sensing with ground-based monitoring techniques are encouraged.

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Co-organized by G3/GM9
Convener: Benoît SmetsECSECS | Co-conveners: Hugues Brenot, Nicolas d'Oreye, Gaetana Ganci
TS7.10

Orogenic plateaus and their margins are integral parts of modern mountain ranges and offer unique opportunities to study the feedback between tectonics and climate through the Earth’s surface. Complex interactions and feedbacks occur among a wide range of parameters, including crustal and deep-seated deformation, basin growth, uplift, precipitation and erosion, landscape and biological change; and lead to (i) the growth, recycling, and destruction of the lithosphere; (ii) shifts in surface elevation; and (iii) high topography that can affect atmospheric circulation. These controlling factors result in plateau lateral growth and its characteristic morpho-climatic domains: humid, high-relief margins that contrast with (semi-)arid, low-relief plateau interiors.

This session aims at creating a discussion forum on the complex interactions and feedbacks among climatic, surficial and geodynamic processes that challenge the notion of a comprehensive mechanism for surface uplift and topographic growth in orogenic plateaus and their margins. To fuel the exchange, we welcome studies of orogenic plateaus worldwide at various scales, from the Earth’s mantle and crust to its surface and atmosphere. We particularly encourage contributions that aim at bridging temporal and spatial gaps between datasets using an interdisciplinary approach or novel techniques.

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Co-organized by CL4/GD5/GM9/SSP1
Convener: David Fernández-BlancoECSECS | Co-conveners: Flora BajoletECSECS, Maud J.M. Meijers, Alexander RohrmannECSECS
TS8.1

Transform faults form major active plate boundaries and are intrinsic features of plate tectonics and plate accretion. Submarine transforms are likely to be fundamental pathways for fluid circulation in depth, thus significantly contributing to the exchange between the lithosphere and the hydrosphere. This implies serpentinization and weathering that affect the mechanical properties in the deformation zone. An open question is the influence of the elemental exchange between the crust and ocean water on these processes, as well as the interactions with the biosphere, both at the surface and at depth. Continental transforms and strike-slip faults are often a site of major earthquakes, representing major hazards for the population. Here too, the role of weathering in the deformation zone is still unconstrained. Both types of faults are still poorly known in terms of structure, rheology and deformation. These features are seismically active zones, with large earthquakes often being recorded on the largest faults. Yet, little is known about the rupture process, seismic cyclicity and active deformation of transform faults. Recent works have shown that fracture zones, supposedly inactive features, can be reactivated and be the site of large earthquakes and deformation. Additional open questions are the way transform faults deform under far-field stresses, such as plate kinematic changes, and under more local stresses, what are the time constants of the processes and what are the primary controls of the tectonic and magmatic styles of the response. The tectonic and magmatic response of large offset transforms, particularly, is still largely unknown.

This session aims to present recent results on studies of these large features, especially on the rheology, deformation patterns, rupture processes, fluid circulation and physical properties of transform faults. We welcome observational studies on strike-slip and transform faults, both continental and oceanic, on fracture zones and on transform continental margins (structural geology and tectonics, geophysical imaging of the crust and lithosphere, petrology and geochemistry, seismology, fluid circulation and rock alteration, geodesy) as well as modelling studies, both analogue and numerical. Cross-disciplinary approaches are encouraged. The submission of abstracts divulging on-going international projects (drilling sites, seismic reflection imaging along strike-slip faults) are also welcome.

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Co-organized by GD6/GM9/SM1
Convener: João Duarte | Co-convener: Marcia Maia
TS9.2

Interpreting topography in terms of tectonics in places that are far removed from plate boundaries has great power in terms of obtaining a conceptual understanding of deep-seated tectonic processes. This is because the build-up of topography due plate margin processes, in particular due to the subduction of oceans, is irrelevant and processes like intracontinental subduction or deep mantle processes can be inferred. We know such processes from a series of intracontinental settings including the Tien Shan, some of the north American basins, from the early evolution of the Alps in the Jurassic and in fact from the present day Eastern Alps / Pannonian Basin transition, where a Pliocene uplift event appears to cause substantial topography seemingly unrelated to plate margin processes. For this session we invite contributions that focus on interpreting deep seated tectonic processes from topography from both the modelling and the field perspective.

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Co-organized by GD6/GM9
Convener: Kurt Stüwe | Co-conveners: Mark Brandon, Jörg Robl
TS10.3 | PICO

Geologic processes are generally too slow, too rare, or too deep to be observed in-situ and to be monitored with a resolution high enough to understand their dynamics. Analogue experiments and numerical simulation have thus become an integral part of the Earth explorer's toolbox to select, formulate, and test hypotheses on the origin and evolution of geological phenomena.

To foster synergy between the rather independently evolving experimentalists and modellers we provide a multi-disciplinary platform to discuss research on tectonics, structural geology, rock mechanics, geodynamics, volcanology, geomorphology, and sedimentology.

We therefore invite contributions demonstrating the state-of-the-art in analogue and numerical / analytical modelling on a variety of spatial and temporal scales, varying from earthquakes, landslides and volcanic eruptions to sedimentary processes, plate tectonics and landscape evolution. We especially welcome those presentations that discuss model strengths and weaknesses, challenge the existing limits, or compare/combine the different modelling techniques to realistically simulate and better understand the Earth's behaviour.

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Co-organized by GD10/GM9
Convener: Frank ZwaanECSECS | Co-conveners: Fabio CorbiECSECS, Ágnes KirályECSECS, Valentina Magni, Michael Rudolf
TS12.1

Plate tectonic processes and associated rates of deformation can be quantified using geomorphological and sedimentary evidence in actively deformed landscapes. A variety of geomorphic markers (e.g., topography and rivers, fluvial deposits, marine terraces) and sedimentary archives (e.g., syntectonic sedimentation, stratigraphic evidence) can be used to constrain rates and dates of tectonic deformation and its processes. Any of these and their combinations, when used in key natural laboratories at adequate time spans, can provide essential clues to understand the tectonic activity and large-scale geodynamic evolution of tectonic plates, and unravel the dynamic changes and tip-points in plate boundary conditions.

We invite contributions that aim to understand the dynamics and evolution of active plate boundaries and deforming plate interiors through geomorphic and/or sedimentary evidence. We welcome all types of studies regardless of their methodology, and especially interdisciplinary efforts, that use geomorphic and sedimentary records to quantify the rates of active deformation and tectonic events, at key sites and across various spatial and temporal scales.

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Co-organized by GD6/GM9/SSP1
Convener: Gino de GelderECSECS | Co-conveners: Lucilla Benedetti, David Fernández-BlancoECSECS, Martine Simoes
GMPV9.3

Glaciers and volcanoes interact in a number of ways, including instances where volcanic/geothermal activity alters glacier dynamics or mass balance, via subglacial eruptions or the deposition of supraglacial tephra. Glaciers can also impact volcanism, for example by directly influencing mechanisms of individual eruptions resulting in the construction of distinct edifices. Glaciers may also influence patterns of eruptive activity when mass balance changes adjust the load on volcanic systems, the water resources and hydrothermal systems. However, because of the remoteness of many glacio-volcanic environments, these interactions remain poorly understood.
In these complex settings, hazards associated with glacier-volcano interaction can vary from lava flows to volcanic ash, lahars, landslides, pyroclastic flows or glacial outburst floods. These can happen consecutively or simultaneously and affect not only the earth, but also glaciers, rivers and the atmosphere. As accumulating, melting, ripping or drifting glaciers generate signals as well as degassing, inflating/ deflating or erupting volcanoes, the challenge is to study, understand and ultimately discriminate these potentially coexisting signals. We wish to fully include geophysical observations of current and recent events with geological observations and interpretations of deposits of past events.

We invite contributions that deal with the mitigation of the hazards associated with ice-covered volcanoes in the Arctic, Antarctic or globally, that improve the understanding of signals generated by ice-covered volcanoes, or studies focused on volcanic impacts on glaciers and vice versa. Research on recent activity is especially welcomed. This includes geological observations e.g. of deposits in the field or remote-sensing data, together with experimental and modelling approaches. We also invite contributions on past activity and glaciovolcanic deposits. We aim to bring together scientists from volcanology, glaciology, seismology, geodesy, hydrology, geomorphology and atmospheric science in order to enable a broad discussion and interaction.

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Co-organized by CR3/GM9/NH2/SM6
Convener: Eva EiblECSECS | Co-conveners: Iestyn Barr, Adelina Geyer, Gioachino RobertiECSECS

GM10 – Geomorphology and Climate

GM10.1

Climate drives Earth surface processes and topographic evolution in various environmental contexts. Understanding the geomorphic response to
* high-frequency climate variability (e.g. freeze-thaw cycles, monsoonal precipitation)
* extreme climatic events (e.g. tropical cyclones, flood/debris flow events)
* long-term climate trends (e.g. Plio-Pleistocene glacial/interglacial cycles, Late-Pleistocene to Holocene climatic change)
* anthropogenic climate and land-use change
* changes in ecosystem (e.g. distribution and composition of vegetation)
appears of prime importance to better interpret erosional processes and sediment fluxes at the Earth’s surface. This session aims at presenting studies addressing climatically-induced changes in surface processes, sediment production and the evolution of topography, as well as feedbacks between Climate, Biosphere and Earth Surface Dynamics over different temporal and spatial scales. Feedbacks could emerge, for example, from a dependence of erosion rates on (1) frequency and amplitude of climate change, (2) lithospheric loading by accumulation of ice or unloading by deglaciation, (3) intensity of weathering and pedogenesis due to biotic activity, and ultimately (4) coupling of tectonics and climate.

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Co-organized by CL4/NH10/SSS9
Convener: Günther PrasicekECSECS | Co-conveners: Georgina Bennett, Andrea Madella, Jörg Robl, Pierre Valla
GM10.2

Africa covers a wide region from the Mediterranean Sea to the Austral hemisphere, and offers an extraordinary variety of landscapes, including: the most arid deserts in the world, intracratonic basins, coastal landforms encompassing two oceans, some of the longest rivers on Earth, the great African Rift, volcanic peaks, and geological depressions. During the Quaternary, major climatic changes dramatically influenced surface processes over Africa and contributed to shape an array of landscapes: aeolian, fluvial, lacustrine, coastal, slope, glacial, and periglacial landforms. Some landforms are ancestral and inherited by the Late Tertiary or the Early Quaternary landscapes, others formed in the last millennia to centuries, in many cases interplaying with humans. Moreover, on-going climatic changes is actively influencing surface processes. The latter phenomenon is happening in a scenario of increasing urbanization and demographic spread, thus dramatically increasing the risk of potential geomorphological hazards. This session aims at gathering contributions covering different field of geomorphology and different approaches, focusing on distinct region of Africa, intending to: i) show the extraordinary variety of landforms over the continent and the main difference between inactive and active surface process; ii) highlight the potential of geomorphological analyses in reconstructing past climatic changes; iii) understand on-going surface processes and predict their effects on the landscape and threatening of people and infrastructures. A careful analysis of past processes and their effects may offer powerful tools to understand future scenario and eventually propose practice to mitigate the geomorphological hazard.

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Co-organized by CL4
Convener: Andrea Zerboni | Co-convener: Jasper Knight
ITS2.3/CL1.19

The Ancient Silk Road was one of the most important passages for trans-Eurasia exchange and human migration, which witnessed the rise and fall of ancient civilizations in Central Eurasia. In the central part of the Ancient Silk Road, where the climate condition is extremely dry and the ecosystem is very fragile. The climate and environment changes, especially the water resources change in this area, can significantly influence the spatio-temporal distribution of Ancient Silk Road network, the trans-Eurasia exchange and human migration along the Ancient Silk Road, and the civilization evolution of these ancient cities and towns among the Ancient Silk Road network. This session aims to explore the history of trans-Eurasia exchange, human migration, Ancient Silk Road network spatial change, civilization evolution and climate and environment change, as well as relationship among them in the areas along the Ancient Silk Road. We welcome presentations concerning these issues from multi-disciplinary perspectives, to promote the advancements of research in the field.

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Co-organized by GM10/SSP1
Convener: Juzhi Hou | Co-conveners: Jianhui Chen, Guanghui Dong, Haichao XieECSECS, Xiaoyan Yang
SSP1.9

What role did climate dynamics play in human evolution, the dispersal of Homo sapiens within and beyond the African continent, and key cultural innovations? Were dry spells, stable humid conditions, or rapid climate fluctuations the main driver of human evolution and migration? In order to evaluate the impact that different timescales and magnitudes of climatic shifts might have had on the living conditions of prehistoric humans, we need reliable and continuous reconstructions of paleoenvironmental conditions and fluctuations from the vicinity of paleoanthropological and archaeological sites. The search for the environmental context of human evolution and mobility crucially depends on the interpretation of paleoclimate archives from outcrop geology, lacustrine and marine sediments. Linking archeological data to paleoenvironmental reconstructions and models becomes increasingly important.

As a contribution towards a better understanding of these human-climate interactions the conveners encourage submission of abstracts on their project’s research on (geo)archaeology, paleoecology, paleoclimate, stratigraphy, and paleoenvironmental reconstructions. We especially welcome contributions offering new methods for dealing with difficult archive conditions and dating challenges. We hope this session will appeal to a broad audience by highlighting the latest research on paleoenvironmental reconstructions in the vicinity of key sites of human evolution, showcasing a wide variety of analytical methods, and encouraging collaboration between different research groups. Conceptual models, modelling results and model-data comparisons are warmly welcomed, as collaborative and interdisciplinary research.

Keynote speaker:
Prof. Dr. Andrew Cohen (University of Arizona) will talk on:
Continental scientific drilling: A game changer for understanding ecosystem evolution in Africa.

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Co-organized by GM10
Convener: Verena E. FoersterECSECS | Co-conveners: Annett Junginger, Janina Bösken, Christian ZeedenECSECS

GM11 – Planetary Geomorphology

GM11.1

Planetary Geomorphology aims to bring together geomorphologists who study the Earth with those who work on other bodies such as Mars, Venus, Mercury, the Moon, icy satellites of the outer solar system, comets, and/or asteroids. Studies applicable to landscapes on any scale on any solid body are welcome. We particularly encourage those who use Earth analogues or laboratory/numerical simulation to submit their work. Considered processes could include aeolian, volcanic, tectonic, fluvial, glacial, periglacial, or "undetermined" ones. We especially welcome contributions from early-career scientists and geomorphologists who are new to planetary science.

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Co-organized by PS4, co-sponsored by IAG
Convener: Susan Conway | Co-conveners: Stephen BroughECSECS, Frances E. G. ButcherECSECS, Tjalling de Haas, Nikolaus J. Kuhn
PS3.4

Volcanism and tectonism are two of the most ubiquitous processes at work in the Solar System, shaping substantially the surfaces of worlds as diverse as the terrestrial planets, main-belt asteroids, and icy satellites. With orbital data and samples from the lunar surface, chronology and geochemistry results from the Moon have provided important sources of knowledge to understand the evolution of small planetary bodies.

Through a combination of solicited and contributed presentations, this session will host observational, analytical, theoretical, and analogue fieldwork research into any aspect of planetary volcanic and tectonic activity. We welcome submissions that compare landforms and processes on multiple bodies, geochemical and chronological data from planetary material, and how lessons from specific studies can be applied to understanding volcanism and tectonism across the Solar System.

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Co-organized by GD11/GM11/TS14
Convener: Ernst Hauber | Co-conveners: Solmaz AdeliECSECS, Petr BrozECSECS
PS4.2

With three rover launches scheduled in 2020, another giant leap in Mars exploration is expected in the next decade. In this session, we welcome contributions about lessons learned from past/current missions, terrestrial analog studies, as well as future exploration and prospects.

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Co-organized by GM11
Convener: Jessica Flahaut | Co-conveners: Benjamin Bultel, Xiao Long, Arianna Piccialli
PS6.2

Analogue planetary research (APR) describes the development and testing of space exploration strategies including scientific, technical, operational, social and medical aspects in terrestrial environments under simulated space or planetary conditions [Hettrich S. et al. (2015), https://doi.org/10.1007/978-3-319-15982-9_34]. As such, APR can be performed in analogue planetary simulation, for example Lunar or Martian analogue missions, where future crewed or robotic space exploration missions are simulated and evaluated towards their performance.

With increasing popularity of analogue planetary simulations as test-beds to develop and test technologies, techniques and operational procedures for planetary missions in facilities such as HiSeas, MDRS, LunAres or similar facilities, this session invites contributions in the field of analogue planetary research including, but not limited to:

- results and lessons-learned from Lunar / Martian analogue missions
- field tests for space exploration hardware, software and techniques
- scientific contributions through analogue research
- geological field work during planetary simulations
- future analogue mission concepts
- transferring APR results into actual space exploration missions

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Co-organized by GI3/GM11
Convener: Sebastian HettrichECSECS | Co-convener: Bernard Foing

GM12 – Geomorphology, People and Heritage

GM12.1

Geodiversity, including surface and subsurface phenomena, objects and processes, reflects the current state of abiotic nature on the Earth. For this purpose, various methods of assessing geodiversity are used, from through mapping to simultaneous monitoring of dynamic elements of the geographical environment.
- Traditionally, rich descriptions of single variables and a static image of geodiversity is obtained through mapping, which registers the current face of the Earth.
- Another solution is a simultaneous record and/or multitemporal assessment of geodiversity through monitoring systems of key environmental elements, including satellite monitoring and geomatics techniques. This approach makes it possible to track changes in geodiversity at different time intervals and thus gain information on dynamic geodiversity.
For both static and dynamic geodiversity, it is essential to choose the right variables and approach that will best reflect the nature of both types of geodiversity as well as will be relevant for issues related to the services offered by geodiversity. Identifying these Essential Geodiversity Variables (EGVs, sensu Schrodt et al. 2019) as geoindicators is the main task of this session.
The large amount of available geoindicators makes it difficult to identify those that would comprehensively meet the expectations of specialists from various disciplines involved in the geodiversity assessment. Nevertheless, geodiversity is now recognized as highly relevant to both scientific and management issues related to Earth surface processes and landscape evolution and an effort for improved EGVs selection should be made. Our EGVs perspective is to contribute to the establishment of a Driver-Pressure-State-Impact-Response (DPSIR) framework associated to environmental issues related to global change, ecosystem services and geoheritage.
This session invites scientific oral and poster contributions on geodiversity in context of geoheritage of natural and cultural landscapes.
The joint session is organized by the IAG Working Group on Landform Assessment for Geodiversity and the IAG Working Group on Geomorphological Sites.

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Co-organized by EOS6, co-sponsored by APG and IAG
Convener: Zbigniew Zwoliński | Co-conveners: Irene BollatiECSECS, Paola Coratza, Marco Giardino, Franziska SchrodtECSECS
SSS3.2

Human land occupation and cultivation often results in characteristic modifications of soils and geomorphology. Widespread examples for pedological and geomorphological land use legacies are agricultural terraces, ridge and furrow systems, or relict charcoal hearths. Pedological legacy effects can also occur without a concurrent characteristic modification of the surface morphology, e.g., as colluvial soils, relict ploughing horizons in abandoned agricultural areas, or through legacies of past soil amendment.
Anthropogenic soils and landforms provide a valuable archive function for geoarchaeological and paleoenvironmental studies. Their spatial distribution can give insight on past land use systems, and their properties provide an enormous potential for process-related research, e.g., for studying long-term effects of carbon enrichment or depletion. Furthermore, land use legacies also affect current ecosystems, as sites often differ from the surrounding landscape in soil chemistry or soil physical properties and in consequence of these specific ecological conditions, sites can exhibit altered species composition, plant growth or cover.
In this session, we would like to gather studies focusing on different types of anthropogenic soils and landforms, working on various scales and in different ecosystems. We invite contributions that approach the ecological, geomorphological, and geoarchaeological significance of land use legacy soils and landforms by:
- mapping and analyzing the spatial distribution of anthropogenic relief features and anthropogenically-affected soils, e.g., using digital elevation models, historic maps or field surveys, or remote sensing data;
- characterizing the specific properties of anthropogenic soils and sediments, e.g., soil stratigraphy, carbon dynamics, or nutrient availability of land use legacy sites or areas;
- reconstructing past land use or paleoenvironments based on the distribution and properties of anthropogenic soils and landforms;
- studying the effects of anthropogenic soils on plants and ecosystems, e.g., forest cover composition, plant growth rates, or soil microbial communities; or by
- evaluating consequences of anthropogenic soil presence or heritage features for land management, e.g. archaeological relevance, heritage value, conservation strategies

By bringing together such studies, the session aims at making a step towards assessing the effects of land use legacies on a landscape scale.

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Co-organized by GM12
Convener: Thomas Raab | Co-conveners: Patrick Drohan, Florian HirschECSECS, Anna SchneiderECSECS
ITS1.9/ESSI4.5

Rural and urban localities are under continued pressure to ensure vibrant, liveable and sustainable environments for their inhabitants. Citizen stewards are forging ahead with innovative small-scale initiatives to provide grass roots solutions for improving environmental and cultural resilience within these landscapes. Enterprises encompass everything from home gardening for providing habitat for native wildlife, to street art for improving visual urban aesthetics, to income diversification strategies for smallholder farmers. These initiatives are often undertaken with limited access to locally relevant environmental information to help guide decisions. In turn, government agencies face challenges with understanding the scale, scope and impact of such bottom-up initiatives in the absence of effective tools for collecting data. Recently, much exciting research has emerged through co-development initiatives between researchers and public contributors to improve communal accessibility to valuable and useable geographical data. Easy-to-use mobile applications have evolved which can provide environmental information to citizen participants to help them map, plan and monitor their enterprises. Such technological enterprises can also provide data to researchers and stakeholders on how the diversity of these spaces links with broader outcomes for human and ecological wellbeing. In this interdisciplinary session we invite research which showcases the value-add of public participation mobile [often geospatial in nature] applications for supporting improved biodiversity and/or cultural inclusivity. Case studies which demonstrate a transitioning towards improved functionality and viability of landscapes under the multitude of socio-ecological threats are welcomed. Likewise, we welcome research which contributes to our broader scientific understanding of sustainable practice within landscapes through using participatory mapping processes. This could also include critical perspectives on the limitations, challenges, ethical considerations and digital divides of using participatory approaches or techniques.

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