Seminari de recerca: "Channelization of an Arid Permafrost Landscape: Observations and Synthesis", a càrrec de Shawn Chartrand, Assistant Professor, geophysical and environmental scientist, School of Environmental Science, Simon Fraser University (Canada). His research focuses on how rivers form and co-evolve with landscapes, with particular interest in mountain rivers and cold regions of the Arctic.
Channelization of an Arid Permafrost Landscape: Observations and Synthesis.
Arctic landscapes are undergoing rapid environmental change due to a warming climate. Expansion of existing channel networks and gullies has previously been attributed to thermal erosion of permafrost. Here, we examine channelization at the drainage basin scale, using a ground-based high resolution 3D LiDAR survey, combined with historical aerial imagery of Axel Heiberg Island, Canadian Arctic Archipelago. Observations suggest that landscape channelization occurs through a variety of processes, not simply thermokarst erosion. In this talk we will begin to outline a path forward to advance the understanding of channelization in cold regions, which includes the development of new understanding at the intersection of fluvial and cryospheric sciences.