Soil erosion is a key driver of land degradation, leading to a cascade of impacts from on-site soil loss and reduced agricultural yields to off-site consequences such as flooding and sediment and contaminant pollution of aquatic environments. The environmental, economic, and societal impacts of soil erosion require a comprehensive scientific understanding of the physical processes controlling soil detachment, transport, storage, and redistribution from hillslopes to catchments, lakes, and estuaries.
This cross-disciplinary session covers the latest scientific developments in soil erosion and sediment delivery. By integrating hydrology, geomorphology, soil sciences, and biogeosciences, we aim to unify all driving forces of land degradation and catchment particle-bound transport.
Our goal is to bridge the gap between plot-scale soil loss and catchment sediment routing, linking short-term monitoring with long-term observations. Advancing this process knowledge connects methodological developments to conceptual frameworks, promoting sustainable management.

The following topics will form the core areas of presentation and discussion:
• Measurements and Tracing: Field and lab experiments developing process understanding (e.g., interrill to gully erosion) and catchment sediment tracing techniques.
• Monitoring: Short- to long-term assessments tracking landscape changes via local field assessments, UAS, and broad-scale remote sensing.
• Modelling Approaches: Innovative simulation techniques, from empirical and process-based to data-driven, addressing runoff, gully erosion, sediment transport, and catchment sediment budgets from plot to global scales under current and future climate scenarios.
• Sediment and Contaminant Dynamics: Quantification of sediment transit or residence times, storage, remobilisation, and the biogeochemical controls of associated contaminant transport impacting riverine and lacustrine ecosystems.
• Mitigation, Restoration and Impacts: Evaluation of conservation strategies, including successes and failures in addressing the on-site and off-site impacts of land use change and disturbances (e.g., agriculture, forestry, mining, urbanisation, wildfires).
Ultimately, we explore conservation strategies that support stakeholders and global initiatives, including the EU Soil Monitoring Law, Land Degradation Neutrality by 2030, and the UN Decade on Ecosystem Restoration (2021-2030).

This is a poster-only session that welcomes contributions about any topic related to geomorphology. If you do not find a GM session that is a good fit for your abstract, this is the place for you. We also particularly welcome contributions about the discipline of geomorphology in general, history of science analyses, interdisciplinary research, career pathways and opportunities, equality-diversity-inclusion (EDI) stories, educational and outreach topics.

The Quaternary Period (the last 2.6 million years) is characterized by frequent and abrupt climate swings and rapid environmental change. Studying these changes requires accurate, precise dating methods that can be applied effectively to environmental archives. Different methods or a combination of various dating techniques can be used depending on the archive, time range, and research question. Varve counting and dendrochronology allow for the construction of high-resolution chronologies. In contrast, radiometric methods (radiocarbon, cosmogenic in-situ, U-Th, and even Pb-210 for the Anthropocene), luminescence dating, and electron spin resonance dating provide independent anchors for chronologies that span longer timescales. We particularly welcome contributions 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 including recognizing and critically examine their limitations 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 modeling; (5) we also welcome contributions integrating multiple chronological and provenance tools including U-Pb geochronology and apatite fission track thermochronology to constrain sediment provenance and source to sink dynamics. Applications may aim to understand long-term landscape evolution, quantify rates of geomorphological processes, or provide chronologies for records of climate change and anthropogenic effects on Earth's system.

Environmental seismology has matured into a key discipline for exploring Earth surface dynamics across a broad range of spatial and temporal scales. Physical, chemical, and biological processes leave measurable imprints in seismic records, whether as discrete events or continuous signatures. By sensing continuously to processes that are hard to observe by other measurements, environmental seismology methods are increasingly refined to capture these signals with high resolution, scalable deployment, and integration across diverse observational platforms. As a community of geophysicists, geomorphologists, glaciologists, hydrologists, volcanologists, engineers, and ecologists, we advance theory, develop methods, and apply seismic observations to pressing questions in Earth-surface research and natural hazards, including when and how mountains and volcanoes destabilize, how glaciers and frozen ground respond to warming, how sediment transport shapes rivers, and how water input alters the subsurface.
We invite contributions on methodological and theoretical developments, field and laboratory experiments, and innovative applications. We particularly welcome work that combines seismic observations with complementary data streams (e.g., remote sensing, in-situ monitoring, fiber-optic networks, or meteorological records), as well as studies leveraging data-intensive approaches (e.g., large-scale arrays, distributed acoustic sensing, machine learning, physics-informed modeling). We anticipate a lively discussion on current challenges in understanding Earth surface processes, opportunities for community-based research and open data initiatives, and the role of seismic methods in addressing urgent questions related to climate change, natural hazard resilience, and coupled Earth system dynamics.

Sediment transport is a fundamental component of all geomorphic systems (including fluvial, aeolian, coastal, hillslopes and glacial), yet it is something that we still find surprisingly difficult both to monitor and to model. Robust data on where and how sediment transport occurs are needed to address outstanding research questions, including the spatial and temporal controls on critical shear stress, the influence of varying grain size distributions, and the impact of large magnitude events. Recent developments have provided a) new opportunities for measuring sediment transport in the field; and b) new ways to represent sediment transport in both physical laboratory models and in numerical models. These developments include (but are not limited to) the application of techniques such as seismic and acoustic monitoring, 3D imaging (e.g. CT and MRI scanning), deployment of sensors such as accelerometers, replication of field topography using 3D printing, use of luminescence as a sediment tracer, remote sensing of turbidity, discrete numerical modelling, and new statistical approaches.

In this session we welcome contributions from all areas of geomorphology that develop new methods for monitoring and modelling all types of sediment transport, or that showcase an application of such methods. Contributions from ECRs and underrepresented groups are particularly encouraged.

Geochronological techniques such as cosmogenic nuclides, thermochronology, radiocarbon and luminescence dating continue to improve in accuracy, precision and temporal range. Developments in combining geochronological methods, data treatment and landscape evolution models have provided new insights into the timing, rates and magnitude of Earth surface processes. Integrating geochronological datasets from different techniques with tectonic, geomorphic, and landscape evolution models offers enormous potential for understanding how tectonics, climate, erosion, and sediment transport interact to shape landscapes across a wide range of spatial and temporal scales. This session includes studies ranging from erosion rates, sediment provenance, burial and transport times, geomorphic response to active deformation, cooling histories and landscape dynamics. and technical developments and novel applications of Quaternary geochronometers. We invite studies that apply novel geochronological methods, combine geochronological and geochemical techniques with numerical modeling or landscape evolution analyses, and that highlight the latest developments and open questions in the application of geochronometers in geomorphology.

Mountains are home to over 1 billion people and one of the most hazardous landscapes on Earth. The combination of steep topography, active tectonics, shifting orographic rainfall patterns and changing glacier equilibrium lines mean hazards in mountain landscapes are highly dynamic.

In these high-elevation landscapes, processes such as landslides, debris flows and floods, often originate at high altitude and propagate downstream, amplifying the impacts and affecting downstream communities. These events may be widespread or highly localized, and are typically triggered by earthquakes, intense storms, or sequences of compounding factors such as rapid snowpack warming, rain on frozen ground, moraine-dam failures, avalanches, or landslides that initiate further mass mobilization. The cascading nature of these processes means that not only the triggering conditions, but also downstream channel morphology and characteristics (e.g., sediment availability and composition) play a role in shaping the magnitude and frequency of such hazards.

In this session, we are keen to include contributions that cover any or all aspects of the mountain, multi-hazard chain across various spatial and temporal scales, such as those that investigate:
· catastrophic sediment mobilization and cascading hazard chains
· processes and hazards linked to deposition and runout
· concepts of compounding and cascading dynamics
· connectivity between hillslopes and river networks
· controls on the downstream evolution of floods and flows.

We welcome presentations employing observational, conceptual, methodological, or modeling approaches, individually or in combination, across diverse mountain environments. Early-career scientists are particularly encouraged to contribute.

Past climate variability and extreme events cannot be understood from any single source of information. Climate-model simulations provide physically consistent representations of past climate states and the processes governing variability and extremes, but they cannot reproduce the unique sequence of events that actually occurred. Geological and biological proxies, historical documents, archaeological records and other event-based archives instead preserve evidence of the realised past, but with heterogeneous temporal resolution, spatial coverage, sensitivity, preservation and uncertainty. This session invites contributions that combine, compare or jointly interpret multiple sources of information to investigate past climate change, variability and extremes.

We particularly welcome studies integrating climate-model simulations with geological, palaeoenvironmental, documentary, historical or archaeological evidence; approaches addressing rare or high-impact events such as storms, floods, droughts and heat extremes; statistical or probabilistic methods designed to account explicitly for dating uncertainty, proxy sensitivity, observational thresholds, preservation biases and model uncertainty.

Of particular interest are approaches that move beyond simple model–data comparison towards a process-based understanding of what different sources can reveal about past climate states and events. Contributions exploring data assimilation, probabilistic inference, multi-proxy synthesis, event attribution, high-resolution palaeoclimate modelling, machine learning, or methods for identifying convergence and disagreement among heterogeneous evidence are encouraged.

The session aims to foster dialogue across traditionally separate communities and to explore how complementary information from models and archives can be combined to produce more physically grounded and uncertainty-aware reconstructions of past climate variability and extremes.

Recent years have seen extraordinarily large events and disasters originating from the high-mountain cryosphere in the Himalaya and beyond. Some of those events in the last five years include the 2021 Melamchi debris flow in Nepal, the 2021 rock-ice avalanche in Chamoli, Uttarakhand, India, or the 2023 South Lhonak GLOF, Sikkim, India.
The most devastating was the 26 August 2026 Rasuwa disaster in Nepal. A very large rock slope failure occurred on the northern slopes of Langtang Lirung (7240 m asl), together with the overlying glacier with an estimated failure volume of 110 to 130 million m3; it produced a rock-ice avalanche that rushed into the Lendhe valley and gradually transformed into a debris flood that devastated the Bhote-Koshi and Trishuli valleys on a length of more than 100 km, through Rasuwa, Nuwakot, Dhading, Gorkha, and Chitwan districts and across the border into Gyirong County, Tibet Autonomous Region. The path of destruction down the valleys is far beyond any historical monsoon-type flood. More than 1,500 people have confirmed dead, around 5,000 are missing, many have been injured, and large number of infrastructures have been damaged or lost. About 10% of Nepal’s hydropower production was wiped away. Total estimated loss as per preliminary estimate is USD 2.7 Billion (6.7% of Nepal’s GDP) and estimated cost for re-building is USD 4.8 Billion (11.8% of Nepal’s GDP).
In this context, understanding the processes behind increasing cases of cryosphere-originated disasters risks in the Himalayan region in South Asia, assessing hazards and residual risks, and identifying ways forward to minimize future risk is critical to support resilient development and planning of societies in the Himalayan region and beyond.
This session aims to bring together the various multi-disciplinary research that has been conducted in the weeks and months after the disaster. It includes but is not limited to aspects such as pre-disaster development in the source area, conditioning and potential preparatory or triggering factors of the initial rock slope failure, attribution to climate change, flow processes and dynamics of the avalanche and debris flood, landscape impact and longer term change, loss and damage estimates, implications for hazard and risk analysis in the region and related recommendations.
We also invite contributions on analysis of other recent large events in the region that can foster insights into the above outlined aspects.

Climate change will lead to periods of intense rainfall, along with increased drought and heatwaves. This stresses landscapes in ways not experienced in our living memory. The critical zone, from tree canopy to unfractured bedrock, is likely compartmentalized, and the interactions between each compartment will evolve under climate extremes. The subsurface will control how landscapes respond, erode, and recover from extreme events (for example, how soils erode, gullies form, landslides initiate, and how rivers incise and transport sediment). In turn, these geomorphic changes further modify infiltration, groundwater recharge, subsurface flow paths, rock fracturing and weathering. Human activities and infrastructure such as dams, irrigation, deforestation, and urbanization further reshape these interactions by altering water and sediment connectivity. We propose a session that will explore the connectivity and feedbacks among the geosphere, hydrosphere, biosphere and technosphere, and how their interactions shape landscape response to change. We invite contributions that seek to model, measure, and observe the functioning of the surface and subsurface as well as interactions between the surface and subsurface, from soils to groundwater and from hillslopes and intermittent streams to rivers. 

Geomorphic systems are increasingly exposed to interacting climatic, environmental and anthropogenic changes that alter the magnitude, frequency and spatial organisation of Earth-surface processes. Understanding landscape responses requires moving beyond individual process domains and viewing geomorphic systems as interconnected networks in which changes can propagate across spatial and temporal scales. Connectivity provides a framework for assessing system structure and its changes, interactions between processes and structural properties, and geomorphic sensitivity—the strength of system responses to internal and external forcing. Responses may be gradual or, when thresholds are crossed, involve abrupt transformations.

This session invites contributions examining geomorphic and hydrological connectivity and its role in the propagation of change, or “transmission sensitivity”, within and across fluvial, hillslope, aeolian, coastal, glacial and periglacial environments. We welcome studies on how material, energy and process connectivity influence geomorphic responses to climate change, land-use change and other human impacts, and how feedbacks between process domains generate cascading or compound responses. Contributions may address sediment, water, ice, wind or biogeomorphic connectivity, including structural, functional and temporal dimensions.

Particular emphasis is placed on gradual versus abrupt geomorphic change, including thresholds, tipping points, regime shifts, extreme events and cascading hazards. We encourage contributions combining observations, monitoring, remote sensing, modelling, experiments and conceptual approaches to identify controls on geomorphic sensitivity and transitions between alternative states.

The session also seeks to link fundamental geomorphic understanding with management and societal challenges. Contributions addressing natural hazards and risks, landscape resilience, river and coastal management, sediment management, ecosystem restoration, nature-based solutions, adaptation and decision-making under environmental change are particularly encouraged.

By bringing together researchers across traditionally separated geomorphic domains, the session aims to foster an integrated understanding of how connectivity controls geomorphic sensitivity, how disturbances propagate through landscapes, and how geomorphic systems evolve under accelerating environmental change.

Why do past climatic changes produce different societal outcomes across regions and through time? This session focuses on the pathways and feedbacks linking climate change, water availability, ecosystem productivity, resource landscapes, human agency, and societal changes during the Holocene and beyond. We invite empirical, theoretical, and modelling studies that identify these processes across past and present human-environment systems. Of particular interest are studies that integrate palaeoclimate and environmental records with archaeological, historical, or societal evidence; examine thresholds, feedbacks, and nonlinear responses; or use process-based, agent-based, network, complex-systems, and data-driven approaches to connect environmental forcing with human decision-making and societal change. By bridging together climate, environmental, and social perspectives, this session aims to advance a process-based understanding of why climatic changes produce diverse societal trajectories under different environmental and social context.

Indigenous Peoples have lived with active landscapes and environmental change for millennia, developing sophisticated knowledge systems grounded in long-term observation, oral traditions, cultural practices, and enduring relationships with place. These knowledge systems provide important insights into Earth surface processes, including volcanic activity, earthquakes, landslides, floods, coastal hazards, environmental change, and the stewardship of culturally significant landscapes.

Addressing complex geohazard and geoheritage challenges increasingly requires approaches that move beyond knowledge sharing towards ethical, reciprocal, and sustained partnerships. This session explores how Indigenous communities, researchers, practitioners, and decision-makers can work together to co-produce knowledge and co-develop solutions that are meaningful, locally relevant, and respectful of Indigenous rights, values, governance, and data sovereignty.

We invite contributions that examine ethical engagement practices at the interface of Indigenous knowledge and geoscience, including collaborative research design, community-led monitoring, participatory hazard assessment, geoheritage stewardship, Indigenous governance, and approaches that foster mutual learning and benefit. We particularly welcome case studies that highlight how equitable partnerships and the respectful weaving of Indigenous and scientific knowledge systems can strengthen understanding of dynamic Earth processes, support disaster risk reduction, enhance geoheritage outcomes, and build trust across knowledge communities.

By focusing on ethical and reciprocal engagement, this session aims to advance more inclusive geoscience practices and showcase pathways for co-developed geohazard and geoheritage solutions that are scientifically robust, culturally appropriate, and socially just.

Recent advances in digital technologies, including remote sensing, digital mapping, mobile applications, extended reality (XR) and artificial intelligence (AI), have created new opportunities for geodiversity and geoheritage research, assessment, mapping and monitoring as well as for outreach and geotourism.
For instance, Augmented Reality (AR) can overlay digital content onto real sites and objects, revealing features that cannot be directly observed. Its applications include reconstructing past landscapes, enriching museum collections, and supporting on-site geoheritage interpretation. Virtual Reality (VR), meanwhile, immerses users in a fully simulated environment, providing remote access to geosites, virtual outcrops, museums and field activities.
AI-based methods are also increasingly being explored in geodiversity and geoheritage studies and applications. At the same time, their use raises important questions concerning scientific reliability, data quality, accessibility, inclusivity, intellectual property, and ethical practice.
The session contributions examine the development, applications and critical evaluation of emerging digital and AI-based approaches in geodiversity and geoheritage research. Topics may include, but are not limited to, extended reality, virtual field experiences, 3D modelling and visualisation, digital inventories and mapping, remote sensing, citizen science, AI-assisted assessment and monitoring, mobile applications, digital interpretation, education, outreach, geoconservation, and geotourism.

The radioactive materials are known as polluting materials that are hazardous for human society, but are also ideal markers in understanding dynamics and physical/chemical/biological reactions chains in the environment. Therefore, man-made radioactive contamination involves regional and global transport and local reactions of radioactive materials through atmosphere, soil and water system, ocean, and organic ecosystem, and its relations with human and non-human biota. The topic also involves hazard prediction, risk assessment, nowcast, and countermeasures, which is now urgent important for the nuclear power plants in Ukraine, the Middle East, etc.

By combining long monitoring data (> halftime of Cesium 137 after the Chornobyl Accident in 1986, 16 years after the Fukushima Accident in 2011, and other events), we can improve our knowledgebase on the environmental behavior of radioactive materials and its environmental/biological impact. This should lead to improved monitoring systems in the future including emergency response systems, acute sampling/measurement methodology, and remediation schemes for any future nuclear accidents. Furthermore, the discharge of ALPS-treated water into the ocean, carried out as part of the decommissioning of the Fukushima Daiichi Nuclear Power Station, has attracted international attention and demonstrated that decommissioning a nuclear power plant that has suffered an accident requires a fundamentally different approach from that of a conventional decommissioning. Studies on past nuclear contamination events and other environmental radioactivity datasets are also welcome.

The following specific topics have traditionally been discussed:
(a) Atmospheric Science (emissions, transport, deposition, pollution);
(b) Hydrology (transport in surface and ground water system, soil-water interactions);
(c) Oceanology (transport, bio-system interaction);
(d) Soil System (transport, chemical interaction, transfer to organic system);
(e) Forestry;
(f) Natural Hazards (warning systems, health risk assessments, geophysical variability);
(g) Measurement Techniques (instrumentation, multipoint data measurements);
(h) Ecosystems (migration/decay of radionuclides).

The transfer of sediments and associated contaminants plays 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 focuses on sources, transport pathways, storage, re-mobilization, and travel times of sediments and contaminants across temporal and spatial scales, as well as their impact on freshwater ecosystems.

This session particularly addresses the following key themes:
1) Sources and Pathways of Sediment and Contaminant Transfer
Understanding how sediments and contaminants originate from natural and human sources (e.g., agriculture, urban areas, mining, industry) and move through the land, river, lake, and reservoir continuum.
2) Transport Dynamics and Environmental Controls
Investigating the transport, retention, remobilization, and transformation of sediments and contaminants, including the influence of biogeochemical processes, human activities (such as hydropower and flood management), and changing environmental conditions.
3) Innovative and Cost-effective Monitoring and Modelling Methods
Developing and applying novel, low-cost, and open-source methods to quantify sediment and pollutant fluxes across different spatial and temporal scales.
4) Impacts on Ecosystems and Landscapes
Assessing how sediment and contaminant dynamics affect river systems, floodplains, riparian zones, in-stream ecosystems, landforms, and geomorphological processes.
5) Long-term Change and Human Influence:
Using sediment archives, sediment budgets, and catchment-scale analyses to evaluate historical trends and understand the effects of human activities and environmental change on sediment and contaminant dynamics over time.

What can thermochronology resolve today, and where can it take us next? Linking methodological advances with geological questions is central to expanding the capabilities and applications of thermochronology. This session brings the thermochronology community together to exchange approaches and findings across regions and disciplines.

We welcome contributions addressing (1) theoretical and experimental advances that introduce new thermochronometers or improve our understanding of conventional systems, including fission-track, (U-Th)/He, ⁴He/³He, ⁴⁰Ar/³⁹Ar, Raman, and trapped-charge methods; (2) approaches to data interpretation, thermal history and thermokinematic modelling that assess uncertainties and test geological scenarios; (3) integration of thermochronology with complementary evidence such as geomorphology, remote sensing or isotopic methods; and (4) geological applications constraining the timing, magnitude and rates of lithospheric and Earth-surface processes across spatial and temporal scales. Applications may range from tectonics and exhumation to landscape evolution and sedimentary histories, while also exploring weathering, hydrothermalism, and ore deposit formation and preservation. Both established uses and new directions have a place in this session. Across these themes, we encourage discussion of unexpected results and interpretative limitations alongside methodological advances and geological findings.

Rapid environmental change and increasing pressures on land and water systems highlight the need to better understand sediment dynamics across river basins. This session brings together research spanning the source-to-sink continuum, from soil erosion and sediment generation on hillslopes and uplands to sediment transport, connectivity, deposition, river processes, and reservoir sedimentation.
We welcome contributions that advance understanding through experiments, observations, monitoring, remote sensing, modelling, and data-driven approaches, including sediment tracing and fingerprinting. We particularly encourage studies addressing sediment dynamics under climate and land-use change, including extreme sediment-mobilizing events such as sediment-laden floods, debris flows, landslide-generated sediment pulses, and their downstream consequences.
Contributions addressing river and catchment management, reservoir sedimentation, restoration, nature-based solutions, and sustainable sediment management are also encouraged. The session aims to connect fundamental process understanding with practical applications and foster interaction among researchers working across hydrology, geomorphology, sediment transport, environmental engineering, and related disciplines. We particularly welcome contributions from early-career researchers alongside established scientists and practitioners.

Mountain ranges experience some of the fastest rates of physical erosion and chemical weathering around the world, making them one of the best places to observe sediment production and transport processes. These dynamic environments host a wide range of processes, such as rockfall, debris flow, hillslope failure, glacial and periglacial erosion, fluvial erosion, transport and deposition, and chemical weathering, that often operate simultaneously, across diverse temporal and spatial scales.

As a result, tracking the interactions between denudation, climatic forcing, tectonic activity, vegetation and land use is complex. Yet, these feedbacks affect both long- and short-term natural surface processes, landscape evolution, and human-environment interactions. Many of these processes are further intensified by climate change, posing increasing threats to the biosphere, mountain settlements and infrastructure. Understanding and quantifying rates of erosion, weathering, transport and deposition within mountain landscapes is a challenging, but crucial research topic in Earth surface processes.

We welcome contributions that (1) investigate the processes of production, mobilisation, transport, and deposition of sediment in mountain landscapes, (2) explore feedbacks between erosion and weathering due to natural and anthropogenic forcings, including climate change, and (3) examine how these processes contribute to natural hazards specific to mountain regions. We invite presentations that employ observational, analytical or modeling approaches in mountain environments across a variety of temporal and spatial scales. We particularly encourage early-career scientists to apply for this session.

River basins worldwide are increasingly confronted by a twin challenge whereby excess sediment from accelerated erosion threatens water quality, aquatic ecosystems, infrastructure and reservoir capacity (too much), whilst sediment deficits downstream compromise river, delta and coastal resilience (too little). These challenges are being amplified by climate change, land-use change, infrastructure development, pollution, resource extraction and increasing pressures on food, water and energy security. While advances in sediment science have greatly improved knowledge, significant challenges remain in translating evidence into effective policies, governance frameworks and management actions.

This session aims to advance dialogue on how scientific understanding of river basin sediment dynamics, and associated contaminants, can better support governance and decision making across the source-to-sink continuum. It interconnects with the International Sediment Initiative (ISI), a flagship initiative of the UNESCO Intergovernmental Hydrological Programme (IHP), which was established to strengthen the links between sediment science, policy and management and to promote sustainable sediment management at local, regional and global scales.

Focusing on the science-policy-practice interface for erosion & sedimentation within river basin and channel processes, we invite contributions that demonstrate how sediment science is supporting policy development, environmental regulation, river basin management, disaster risk reduction, climate adaptation and ecosystem restoration at local, national and international scales. We welcome contributions that move beyond process understanding and methodological development to examine the uptake, application and impact of sediment knowledge in decision-making contexts.

Relevant to researchers, practitioners, policymakers and international organisations, the session will provide a forum to share experiences, lessons learned and emerging approaches for translating sediment science into policy and practice, with the aim of strengthening sustainable sediment management across local to global scales.

This session welcomes all studies on Mars science and exploration. With many active missions, Mars research is as active as ever, and new data come in on a daily basis. The aim of this session is to bring together disciplines as various as geology, geomorphology, geophysics, and atmospheric science. We look forward to receiving contributions covering both past and present processes, either pure Mars science or comparative planetology (including fieldwork on terrestrial analogues), as well as modeling approaches and laboratory experiments (or any combination of those). New results on Mars science obtained from recent in situ and orbital measurements are particularly encouraged, as well as studies related to upcoming missions and campaigns (e.g., ExoMars).

The evolution of orogens and sedimentary basins is driven by the complex interplay between crustal deformation, mantle dynamics, and climate-driven surface processes. Despite longstanding recognition of their importance, the feedback mechanisms linking erosion, sediment transport and deposition, to crustal tectonics, and mantle dynamics — including magmatism — remain an area of intense research. In particular, the overall source to sink system from eroding orogens to subsiding lacustrine or marine basins and their sedimentary infill remains elusive.

Advancing our understanding of these coupled systems requires an interdisciplinary approach. A major challenge lies in quantifying uplift, erosion, subsidence, and sedimentation, while distinguishing the respective roles of crustal deformation, mantle flow, and climate-driven processes — each acting across different spatial and temporal scales and often leaving overlapping signals in the geological record.

This session brings together comprehensive studies that integrate observational data (e.g., field studies, geophysical and well data, thermochronology), theoretical frameworks, and both analogue and numerical modelling. Our goal is to foster dialogue between disciplines and highlight innovative approaches that bridge mantle, lithospheric, crustal, and surface processes.
We welcome contributions that explore the coupling of tectonics and surface processes, including the roles of climate, erosion, sedimentation, and deep Earth dynamics in shaping the Earth's surface over time.

Earth topography and its subsurface are the result of complex interactions between tectonics and climate. Sediments in the shallow subsurface contain resources including water and energy that are vital for mankind. They also provide temporary and long-term waste and energy storage. At the same time active deformation and rapid climate change interact posing significant risk for natural hazards such as debris flow, hillslope instabilities, and active faulting. To address these pressing challenges in the realm of Earth-climate interactions, it is imperative to enhance our expertise in connecting extensive datasets with deterministic forward models. This session aims to bring together research on climate - surface processes - tectonics interactions across a wide range of spatial and temporal scales using big-data informed models focussing on fundamental questions: (1) What are the short- and long-term interactions of the tectonic-surface process feedback system? (2) What is the influence of on-going climate change on the frequency and magnitude of rapid geomorphic events such as landslides and debris flow and how is this influenced by surface morphology and environmental conditions? (3) How is the subsurface responding to short-term climate variability including anthropogenic climate change and how does this affect water and energy resources? (4) How do tectonic processes such as mountain building, continental rifting, and mantle flow respond to changes in global climatic events and surface-mass transfers and how do inherited structures control this response? (5) How can we integrate and exploit big data in the Earth sciences to better constrain coupled geodynamic, surface process, and climate models?

Although less frequent, impactful moderate magnitude co-seismic surface rupturing earthquakes occur in intraplate and low strain regions, demonstrating that faults in those regions are capable of hosting moderate-size to large damaging earthquakes. Nonetheless, fault activity and seismicity are generally difficult to assess: at these settings, surface processes rates may erase or bury evidence, and deformation may also be accommodated by reactivation of exhumed older fault systems, generally with wide fault zones, favoring distributed brittle deformation within a previously deformed bedrock, thus masking subtle Quaternary deformation. Furthermore, sparse seismic and geodetic networks limit correlation of seismicity and surface deformation with structures.

Evidence for long-term deformation, provided through geomorphic analyses and detailed geologic and paleoseismologic studies combined with geochronology and geophysical data, are a key to recognize a built-in imprint of deformation through time, and to corroborate tectonic activity. These are crucial to reveal Quaternary cryptic structures, constrain regions with seismogenic potential and required to understand distributed Quaternary deformation. Short-term activity and deformation can be investigated using dense local seismic networks, which may further help to associate local instrumental seismicity with faults localization. Depending on the strain and period of observation, remote sensing and geodesy may also highlight noteworthy regions.

Every year brings new observations about earthquakes with a level of detail never reached before. In parallel, observational and computational methods keep improving significantly in seismology, geodesy, and in paleoseismology-geomorphology. Hence, on one hand, the number of earthquakes with well-documented rupture processes and deformation patterns is increasing. On the other hand, the number of studies documenting long time series of past earthquakes, including quantification of past deformation, has also increased. In parallel, the modeling community working on rupture dynamics, including earthquake cycle, is also making significant progress. Thus, this session is the opportunity to bring together these different contributions to foster further collaboration between the different groups all focusing on the same objective of integrating earthquake processes into the earthquake cycle framework and possibly use it for seismic hazard assessment. In this session, we welcome contributions documenting earthquake ruptures and processes, both for ancient events or more recent ones, such as the 2025 Myanmar earthquake, or the 2026 Venezuela doublet earthquakes for examples, from seismological, geodetic, or paleoseismological perspectives. Works combining different approaches are particularly welcome, as are contributions documenting deformation during pre-, post-, or interseismic periods, which are highly relevant to understanding earthquake cycles. We also seek contributions looking at the earthquake cycle from the modeling perspective, both numerical or analogue, especially including approaches that mix data and modeling. Finally, seismic hazard assessment works building on this multi-scales approach will also be considered.

Icehouse conditions have characterized the evolution of Earth's surface over multiple timescales. Their recurrence and intensity are paced by the interplay among surface and deep-seated processes, as well as astronomical forcing. Under colder climate conditions, landscapes are modified by the physical action of ice masses, including polar ice sheets, high-elevation and high-latitude ice caps, and valley glaciers. Each stage of landscape evolution can be traced through erosion of the substrate beneath and around the ice bodies, and through the subsequent transport and deposition of eroded material. Tracing these sediment-routing pathways is a key tool for understanding past and present ice dynamics.
Through numerical modeling of sediment and provenance proxies, it is possible to investigate how glacial landscapes are eroded and evolve in response to climate variability and tectonics through time.
We especially welcome contributions focusing on, but not limited to, the Cenozoic, encompassing the development of high-latitude polar environments and the recurrent advances and retreats of mountain glaciers during the Quaternary. We encourage studies employing approaches that bridge sedimentology, geomorphology, and related disciplines, including cosmogenic nuclides, thermochronology, detrital geochronology, geochemical provenance tracer, and petrographic and mineralogical characterization of grains. Contributions integrating these techniques with remote sensing, GIS-based analyses, and numerical modeling are encouraged.

Debris-covered glaciers are found everywhere on Earth (and on other planets) and are becoming more widespread with climate warming. Understanding the effects of supraglacial debris on glacier mass balance and dynamics, and the geomorphic processes that govern debris supply, transport, and landscape evolution, is therefore required to explore the evolution of debris-covered glaciers and improve projections of global changes in glacier volumes and their downstream impacts. We invite the vibrant community of researchers working on debris-covered glaciers to share their most recent advances in this session. We welcome submissions on all aspects of debris-covered glacier research including but not limited to: the dynamics of debris-covered glaciers, glacier surface energy and mass balance, surface processes such as ice cliffs and supraglacial ponds, supraglacial debris properties, debris-covered glacier hydrology, interactions with slope processes and surrounding geomorphology, landscape evolution linked to debris-covered glaciers, and the influence of supraglacial debris on near-surface meteorology. Methodological developments for studying debris-covered glaciers are also welcome, including; novel field observation techniques, remote sensing analyses at local or global scales, and glacier models or machine-learning approaches applied to debris-covered glaciers.

Northeast Greenland occupies an important position within the Arctic, linking the Greenland Ice Sheet and ice-free terrestrial landscapes with the Arctic Ocean and Greenland Sea. Geologically and environmentally, the region has undergone major change associated with the opening and deepening of Fram Strait, the onset and intensification of Arctic–Atlantic water exchange, the early formation of ephemeral glaciers, the later build-up of the Greenland Ice Sheet, and its repeated expansion and retreat throughout the Quaternary. Ice-core records from EGRIP provide insights into past climate and ice-sheet dynamics, while observations of the Northeast Greenland Ice Stream and its outlet glaciers reveal ongoing changes in one of the ice sheet's major drainage systems. Under ongoing anthropogenically forced warming, Northeast Greenland is particularly sensitive to Arctic amplification, resulting in rapid changes across its terrestrial, cryospheric, marine and atmospheric systems. Understanding these changes, their interactions and their future trajectories requires integration across disciplines and timescales.
We invite contributions from marine, cryospheric, terrestrial and atmospheric research focused on Northeast Greenland, extending from eastern North Greenland to northern East Greenland. Studies that improve our understanding of the region across geological timescales through the present and into the future, using geological and palaeoenvironmental archives, ice-core records, contemporary observations, process studies, remote sensing and numerical modelling, are all invited. We particularly encourage studies that explore connections among systems, including the dynamics and evolution of the Northeast Greenland Ice Stream, ice-sheet–ocean interactions, atmospheric and oceanic forcing, freshwater and sediment fluxes, ocean circulation and sea ice, long-term landscape evolution and its interactions with glaciation, permafrost dynamics, and terrestrial and marine ecosystem change.