Sediment transport in geophysical flows spans diverse environments including mountainous regions, rivers, estuaries, coasts, deserts, and engineered settings on Earth, and also shapes planetary surfaces such as Mars, Titan, and Venus. Understanding how sediments move remains a central challenge in hydrological, geomorphological, and planetary sciences. These processes operate across multiple spatial and temporal scales—from the movement of individual particles to landscape evolution—directly affecting geomorphology as well as ecological and biological functions in terrestrial environments, and influencing the structural resilience of built infrastructure.

Critical feedbacks between fluid motion, sediment dynamics, and particle interactions—such as size sorting—drive surface process variability, with implications ranging from hydraulic engineering and hazard risk management to predicting landscape and ecosystem responses.

A) Particle-Scale Interactions and Transport Mechanics:
-Entrainment mechanics in both fluvial and aeolian flows
-Turbulent energy and momentum transfer to particles
-Statistical approaches to upscaling stochastic sediment movement
-Dynamics of granular flow in dry and submerged scenarios
-Effects of grain morphology on sediment and granular transport
-Interactions among mixed-size sediment grains and segregation processes
-Discrete element modeling and upscaling into continuum frameworks

B) Reach-Scale Fluvial and Geomorphic Dynamics:
-Relationships among flow hydraulics, sediment transport, bedform development, and stratigraphy
-Equation development and solution for multiphase flows in rivers and air
-Shallow-water hydro-sediment-morphodynamic modelling
-Characterizing complex, unsteady flows including flash floods and granular mass movements
-Extreme event impacts: flood waves, debris flows, landslides

C) Engineering Applications and Earthcasting hazards:
-Dam failure processes (natural and engineered) and cascading hazards
-Coastal sediment transport (long-shore, cross-shore) and shoreline evolution
-Reservoir management and sediment process interactions
-Hydraulic structure design (e.g., fish passes, spillways) with consideration of sediment impacts
-Maintenance and management of waterways: dredging, regulation in large river systems
-Calibration and validation methodologies for Earth's surface hazards forecasts.

Mountain glaciers record climate change over a wide range of temporal and spatial scales. They are providing valuable and high-resolution archives of Quaternary and Holocene environmental variability while also serving as sentinels of modern and future climate dynamics. As mountain regions respond rapidly to the current Climate Change, there is an increasing need for research that not only reconstructs past glacier extent and dynamics but also integrates these insights with models, remote sensing, and emerging analytical techniques to understand the processes shaping high-altitude environments today and in the future.
This session invites contributions that advance understanding of mountain glaciations through various methodological approaches, including the integration of geomorphological mapping, geochronology, numerical modelling, and palaeoclimate analysis. Studies addressing cross-regional comparisons, hemispheric linkages, and interdisciplinary frameworks are particularly encouraged, as are those that connect Quaternary glaciations with contemporary glacier change, hazards, and water resource management. By bringing together researchers from a range of disciplines and regions, this session aims to provide a platform for both consolidating established knowledge and introducing innovative perspectives, fostering collaboration across temporal, spatial, and disciplinary boundaries.

Science communication includes the efforts of natural, physical and social scientists, communications professionals, and teams that communicate the process and values of science and scientific findings to non-specialist audiences outside of formal educational settings. The goals of science communication can include enhanced dialogue, understanding, awareness, enthusiasm, influencing sustainable behaviour change, improving decision making, and/or community building. Channels to facilitate science communication can include in-person interaction through teaching and outreach programs, and online through social media, mass media, podcasts, video, or other methods. This session invites presentations by individuals and teams on science communication practice, research, and reflection, addressing questions like:

What kind of communication efforts are you engaging in and how are you doing it?
What are the biggest challenges or successes you’ve had in engaging the public with your work?
How are other disciplines (such as social sciences) informing understanding of audiences, strategies, or effects?
How do you spark joy and foster emotional connection through activities?
How do you allow for co-creation of ideas within a community?
How are you assessing and measuring the positive impacts on society of your endeavours?
What are lessons learned from long-term communication efforts?

This session invites you to share your work and join a community of practice to inform and advance the effective communication of earth and space science.

The interactions between aerosols, climate, weather, and society 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. Dust impacts snow and ice albedo and can accelerate glacier melt. In addition, properties of dust deposited in sediments and ice cores are important (paleo-)climate indicators.

This interdivisional session -- building bridges between the EGU divisions AS, CL, CR, SSP, BG and GM -- had its first edition in 2004 and it is open to contributions dealing with:

(1) measurements and theoretical concepts of all aspects of the dust cycle (emission, transport, deposition, size distribution, particle characteristics),
(2) numerical simulations of dust on global, regional, and local scales,
(3) meteorological conditions for dust storms,
(4) interactions of dust with clouds and radiation,
(5) influence of dust on atmospheric chemistry,
(6) fertilization of ecosystems through dust deposition,
(7) interactions with the biosphere, cryosphere, and hydrosphere,
(8) any study using dust as a (paleo-)climate indicator, including sediment archives in loess, ice cores, lake sediments, ocean sediments and dunes,
(9) impacts of dust on climate and climate change, and associated feedbacks and uncertainties,
(10) implications of dust for health, transport, energy systems, agriculture, infrastructure, etc., and early warning systems

We especially encourage the submission of papers that integrate different disciplines and/or address the modelling of past, present, and future climates.

We are delighted to announce that in the 23rd edition of the dust session, Dr Claudia Di Biagio (LISA) and Dr. Diego Villanueva (ETHZ) will provide solicited talks about their work on dust radiative properties and dust-driven droplet freezing.

The session deals with the documentation and modelling of the tectonic, deformation and geodetic features of any type of volcanic area, on Earth and in the Solar System. The focus is on advancing our understanding on any type of deformation of active and non-active volcanoes, on the associated behaviours, and the implications for hazards. We welcome contributions based on results from fieldwork, remote-sensing studies, geodetic and geophysical measurements, analytical, analogue and numerical simulations, and laboratory studies of volcanic rocks.
Studies may be focused at the regional scale, investigating the tectonic setting responsible for and controlling volcanic activity, both along divergent and convergent plate boundaries, as well in intraplate settings. At a more local scale, all types of surface deformation in volcanic areas are of interest, such as elastic inflation and deflation, or anelastic processes, including caldera and flank collapses. Deeper, sub-volcanic deformation studies, concerning the emplacement of intrusions, as sills, dikes and laccoliths, are most welcome. We also particularly welcome geophysical data aimed at understanding magmatic processes during volcano unrest. These include geodetic studies obtained mainly through GPS and InSAR, as well as at their modelling to imagine sources.

The session includes, but is not restricted to, the following topics:
• volcanism and regional tectonics;
• formation of magma chambers, laccoliths, and other intrusions;
• dyke and sill propagation, emplacement, and arrest;
• earthquakes and eruptions;
• caldera collapse, resurgence, and unrest;
• flank collapse;
• volcano deformation monitoring;
• volcano deformation and hazard mitigation;
• volcano unrest;
• mechanical properties of rocks in volcanic areas.

Denudational earth surface processes and associated source-to-sink sedimentary fluxes are controlled by a range of environmental drivers and anthropogenic activities, exacerbated by the consequences of climate change. An improved understanding of the key drivers, mechanisms and quantitative rates of denudational dynamics across a range of different spatio-temporal scales and climatic zones is essential for the quantitative analysis of landscape evolution and has also significant societal implications.
There is general agreement that environmental changes and global warming are leading to increased frequencies and intensities of extreme weather and climate events. Such extreme events include, e.g., temperature extremes and droughts, heavy precipitation, storms, pluvial floods and river floods. Scientific studies on possible effects of the increasing frequency and/or intensity of such extreme weather and climate events on geomorphic processes and related earth surface systems are of particular importance as they are addressing key challenges related to the environment in which we live.
This session presents contributions from earth scientists that include a wide spectrum of processes, approaches, methods and techniques, like, e.g., dating, sedimentary records, GIS, remote sensing, observational records, monitoring, experimental studies, and modelling. Several studies have wider systematic relevance and implications, and some presentations highlight contributions of geomorphological research to the ongoing debates on the effects of global environmental changes on geomorphic processes and natural and anthropogenically modified earth surface systems, and for the development of suitable and sustainable mitigation, management and adaption strategies and actions.

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

Present-day glacial and periglacial processes in cold regions, i.e. arctic and alpine environments, provide 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.

Are you unsure about how to bring order in the extensive program of the General Assembly? Are you wondering how to tackle this week of science? Are you curious about what EGU and the General Assembly have to offer? Then this is the short course for you!

During this course, we will provide you with tips and tricks on how to handle this large conference and how to make the most out of your week at this year's General Assembly. We'll explain the EGU structure, the difference between EGU and the General Assembly, we will dive into the program groups and we will introduce some key persons that help the Union function.

This is a useful short course for first-time attendees, those who have previously only joined us online, and those who haven’t been to Vienna for a while!

Glaciers cover roughly 10 percent of the Earth’s surface and help shape landscapes and relief in high latitude regions and many mountain ranges. Subglacial processes, such as sliding, create material that shapes the landscape. Paraglacial processes also have a strong impact on the glacial landscape evolution. Debris that falls upon the ice, or is entrained in it, is advected down the glacier to where it melts out, creating moraines. Existing sediment beneath the glacier can be mobilized by pressurized subglacial water and transported in proglacial rivers or deposited in lakes or fjords. In Arctic and Subarctic regions, interactions between sediment and ice dynamics are actively reforming the geomorphology and hydrological regime of river deltas, impacting their sediment supply. The role and importance of these processes will evolve as glacier dynamics change and hydrology in glacierized catchments responds to climate change.
This session aims at gathering contributions that use modeling, laboratory, field observations, archives, or remote sensing methods, or a combination thereof, to evaluate these evolving processes in Alpine and Arctic regions. We welcome submissions that address these processes across a wide range of timescales, from sub-daily to multi-millennial, including those focused on these dynamics during past climate variations. Additionally, we are interested in research contributions focused on diverse glaciated environments from small alpine glaciers to large Arctic deltas. Research that addresses the changes that occur as climate warms and how these processes interact with other aspects of the Earth system, including glacier dynamics, sea ice, and river deltas, is of particular interest for this session.

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 and methodological 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 would specifically like to encourage submissions from early career researchers and students.

In April 2023, EPOS, the European Plate Observing System launched the EPOS Data Portal (https://www.ics-c.epos-eu.org/), which provides access to multidisciplinary data, data products, services and software from solid Earth science domain. Currently, ten thematic communities provide input to the EPOS Data Portal through services (APIs): Anthropogenic Hazards, Geological Information and Modelling, Geomagnetic Observations, GNSS Data and Products, Multi-Scale Laboratories, Near Fault Observatories, Satellite Data, Seismology, Tsunami and Volcano Observations.
The EPOS Data Portal enables search and discovery of assets thanks to metadata and visualisation in map, table or graph views, including download of the assets, with the objective to enable multi-, inter- transdisciplinary research by following FAIR principles.
This short course will introduce the EPOS ecosystem and demonstration of integrated virtual research environment where users can stage their data and run Jupyter Notebooks, either from existing examples or their own. We see this interactive coding and development environment as a gate towards faster scientific progress and enabling open science.
It is expected that participants have scientific background in one or more scientific domains listed above. The training especially targets young researchers and all those who need to combine multi-, inter- and transdisciplinary data in their research. The use of the EPOS Platform will simplify data search for Early Career Scientists and potentially help them in accelerating their career development. Feedback from participants will be collected and used for further improvements of the EPOS system.

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.

Mountains are iconic landscapes, vital water sources, and home to millions of people. In steep, high-elevation environments such as the Alps, Himalaya, Andes, and Rockies, extreme floods, debris flows, and other catastrophic hazards often originate at altitude and propagate downstream, amplifying their impacts. 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.

Ongoing climate warming is shifting glacier equilibrium lines and freezing zones upslope, exposing vast areas of formerly ice-bound sedimentary material to potential mobilization by extreme floods or mass flows. Their high-altitude position, combined with gravitational potential energy on steep mountain slopes, makes them especially susceptible to cascading hazards in the future.

This session invites contributions that investigate, across spatial and temporal scales:
• 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
• feedbacks between stabilizing and destabilizing slope processes

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.

The "Planetary Geomorphology and Surface Processes" session brings together scientists studying how landscapes form, evolve, and erode on Earth and other planetary bodies in our Solar System.
Our session will provide a platform for cross-planetary discussion of the processes that generate and erode landscapes, create stratigraphy, and couple planetary surface dynamics to climatic and tectonic drivers. Considered processes could include aeolian, volcanic, tectonic, fluvial, glacial, periglacial, or as-yet "undetermined" ones.
We welcome contributions on Mars, Venus, Mercury, the Moon, icy satellites of the outer solar system, comets, and/or asteroids, to submit to our session. We believe that an interdisciplinary approach through sharing and discussing ideas across planetary borders is key in answering current questions and for the formation of new ideas, and thus we especially encourage cross-planetary contributions. We particularly welcome contributions from early-career scientists and geomorphologists who are new to planetary science.