Contact: Marmian Grimes
University of Alaska Fairbanks
Caption: This is an aerial view of a thermokarst near the Toolik Field Station, 150 miles north of the Arctic Circle. Thawing of ice rich permafrost resulted in the collapse of the ground surface.
Credit: Photograph by Tamara K. Harms, July 2009
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Related news release: GI researcher co-author of international permafrost report