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Federal
Streamflow in the United States, 1940–2022
U.S. Environmental Protection Agency —
This map shows percentage changes in the minimum annual rate of water carried by rivers and streams across the country, based on the long-term rate of change from... -
Federal
Change in Permafrost Temperatures in Alaska, 1978-2023
U.S. Environmental Protection Agency —
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... -
Federal
Change in Growing Degree Days in the Contiguous 48 States, 1948–2020
U.S. Environmental Protection Agency —
This map shows trends in the total number of growing degree days per year at 305 weather stations . The color and size of the symbols represent percent change between...