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GM3.1/SSP3.22/SSS2.19

Erosion and sedimentation processes in the high mountains (co-organized)
Convener: Luca C Malatesta  | Co-Conveners: Taylor Schildgen , Pierre Valla , Kristen Cook , Christoff Andermann 
Orals
 / Thu, 21 Apr, 10:30–12:00  / Room K1
Posters
 / Attendance Wed, 20 Apr, 17:30–19:00  / Hall X1
High-elevation and active mountain ranges are areas of widespread, net, and highly dynamic denudation. However, erosion and sediment transport are often stochastically driven and can be highly variable over a range of temporal and spatial scales, making them notoriously difficult to constrain. Comprehending the two complementary mechanisms at a process scale — where erosion occurs, sediments appear and where sediments deposit, erosion ceases or erosion exceeds transport capacity — is key for understanding the functioning of landscape systems and the production, transport and ultimate fate of eroded sediment.
The following aspects of erosion and sedimentation processes are of particular interest: 1) The multitude of available techniques for quantifying erosion rates in combination with physical principles provides powerful tools to sharpen our understanding of these processes, yet also poses challenges for comparing rate estimates tied to different time periods and methods; 2) The alluviation of mountain valleys causes incisional hiatuses and provides material for cut-and-fill terraces, affecting our interpretation of the terrace record; 3) Intermittent yet extensive sedimentary deposits in the high mountains serve as sediment reservoirs along the sediment routing system and complicate the transmission of forcing signals.
We solicit contributions that investigate erosional and depositional dynamics in mountain belts on time scales ranging from days to millions of years. We welcome work combining methods such as remote sensing, sediment budgets, geochemical analysis, cosmogenic isotopes, biogeochemistry, geophysical techniques, field based studies, digital terrain analysis, and experimental as well as theoretical contributions.

Invited speakers:
Vamsi Ganti (Imperial College London)
Simon Mudd (University of Edinburgh)