Change in Permafrost Temperatures in Alaska, 1978-2020

This map shows the change in permafrost temperature per decade for long-term borehole sites in Alaska. As the circles get larger, the rate of warming per decade increases. The blue circle represents a cooling trend. Borehole measurement depths range from 49 to 85 feet. For more information: https://www.epa.gov/climatechange/science/indicators.