Polar and Alpine Events Calendar
*Wednesday, June 17 (11am ADT)*
VAWS: Responses of Permafrost Landscape to Surface Disturbances ? Case
studies in Siberian forest and Alaskan tundra
*Go IwahanaResearch Assistant ProfessorInternational Arctic Research
CenterUniversity of Alaska Fairbanks*
Ground-surface disturbances, including wildfires, deforestation, and
climate change, alter the thermal status of permafrost leading landscape
changes in Polar Regions. Given the increasing number of reports about
rapid permafrost thaw and predicted occurrence of wildfires in the Arctic,
it is of great social concern to know where and to what extent permafrost
degradation is currently ongoing and may occur in the near future. This is
true, especially in ice-rich permafrost zones, as consequential subsidence
by ice-rich permafrost thaw (thermokarst) will cause significant changes in
surface ecology, landscape evolution, and hydrological processes.
This presentation introduces several case studies on thermokarst subsidence
observed in the field and by remote sensing in various time ranges. Field
surveys and microwave remote sensing analyses were conducted to quantify
thermokarst after surface disturbances in boreal forests of NE Siberia and
tundra fire scars in Alaska.
More information and registration here.