GM7.4River and slope responses to climate change in steep landscapes
|Co-Conveners: Pierre Valla , Monique Fort , Romain Delunel|
Mountains landscapes are shaped by glaciers and periglacial agents during cold-stages, and by river and slope processes following each glacial-interglacial transition. In the humid tropics, they are shaped by extreme meteo-hydrological events, which modifications of frequency may be recorded by geomorphic features. Present-day landscapes exhibit a suite of overprinted morphologies integrating surface processes at different spatial and time scales (e.g., low-frequency but high-magnitude landsliding, slow and widespread frost-induced processes, or highly localized bedrock channel incision and/or aggradation).
This session focuses on constraining quantitatively the surface processes linked to climate oscillations, which potentially trigger feedbacks that either impede or hasten further changes to topographic relief. We encourage contributions from those engaged in understanding present-day landscape forms and processes conditioned by glacial and/or humid episodes, especially multidisciplinary approaches to hillslopes/rivers coupling, and the interplay between erosion, sediment supply and transport. We welcome innovative field-based, experimental/numerical modeling studies, and geochronological approaches that provide insights into the evolution of cold landscapes.