Landscapes are continuously shaped by tectonics and climate across geologic timescales and into the present day. Sedimentary archives therefore offer a unique window providing narratives for how geomorphic systems adapt to external forcings. However, bridging the gap between modern and ancient observations is not straightforward due to preservation, buffering and shredding of environmental signals, requiring integration of both short- and long-term records scattered in landscapes and stratigraphy across time. Likewise, natural hazards, such as floods and slope failures, mobilize large quantities of sediment in short timescales. Yet, their impact on sedimentary systems and landscape evolution can last from the event scale to millions of years. Understanding sediment generation by natural hazards, as well as the interactions between natural hazards and other source-to-sink processes, is important for predicting the response of planetary surfaces to past and future environmental change. This session aims to integrate insights across timescales and methods to understand the sensitivity of modern and ancient landscapes to natural hazards, climate change and tectonic perturbations. It is becoming increasingly clear that in order to unlock projections of landscape change in the future, we must integrate our analysis from source to sink, using insights from modern short-term landscape dynamics to understand stratigraphy, and using long-term geologic approaches to unlock projections of landscape change in the present and future.
Our session will value research which uses quantitative techniques drawing on sedimentology, geomorphology, stratigraphy, geochemistry and modeling and we welcome research on a wide range of hazards including landslides, rockfalls, rock avalanches, debris flows, volcanic eruptions, flooding, tsunamis, and climate warming-induced hazards like thawing permafrost and retreating glaciers. We seek submissions that explore the roles of climate, tectonics, and human impacts on natural hazards and sediment dynamics. We especially encourage studies investigating dynamic feedbacks among natural hazards, sediment routing systems, and human modification of the landscape. The ultimate goal of this session is to improve our understanding of the dynamics of past, present, and future geomorphic systems in response to changes in tectonic and climatic boundary conditions.