AGU session: Interdisciplinary Approaches to Conceptualizing Nonlinear Changes in Permafrost
Participate in our interdisciplinary permafrost session at this year’s Fall AGU meeting! We seek geologists, ecologists, geochemists, earth system modelers, and more to discuss temporal and spatial heterogeneity in permafrost landscapes. Our session will ideally cover many disciplines, so all approaches and study domains are welcomed. We will aim to put together a review or conceptual paper stemming from key questions addressed during the session.
Description: Climate change is altering disturbance regimes in permafrost landscapes. Dramatic shifts have been observed or are projected in timing and severity of wildfire disturbance, hydrogeology, and permafrost degradation including rapid active-layer deepening and thermokarst development. Because ecosystem responses to these changes depend on feedbacks among physical processes, ecological dynamics, and biogeochemical processes, multiple approaches and disciplines are needed to make meaningful predictions about what permafrost landscapes will look like in 50 or 500 years. Progress is being made toward understanding ecosystem function under historical and current disturbance regimes using remote sensing, pattern and change detection, and chronosequence approaches. These approaches often vary between upland, wetland, and lake systems, limiting our ability to project future states at regional scales. We encourage presentations investigating how ecosystem structure and function respond to changing disturbance regimes in permafrost landscapes and are particularly interested in presentations addressing abrupt or nonlinear landscape change in space and time.
Invited speakers: Helene Genet (University of Alaska Fairbanks)- on the topic of “interdisciplinary approaches to studying permafrost changes using modeling and empirical evidence with a focus on ecosystem trajectories”
Steve Kokelj (Northwest Territories Geological Survey)- on the topic of “Non-linearity in the impacts of slope thermokarst and approaches for quantifying the downstream routing of sedimentary and geochemical impacts from slope to large watershed scales.”
Organizers: Thomas A. Douglas (U.S. Army Cold Regions Research and Engineering Laboratory Alaska) Merritt R. Turetsky (University of Guelph, Canada) Benjamin W. Abbott (Brigham Young University, USA)