Is the Arctic Changing Now?
On average, Arctic air temperatures—like those globally—have warmed since 1900. Warming has been greatest in Alaska and Siberia. However, Southern Greenland has cooled.
Changes in Arctic ice cover have also been observed. The seasonal melting of the Greenland Ice Sheet, for example, has increased on average by 16% from 1979 to 2002.
How Warm Might the Arctic Get?
Most computer models forecast an average temperature rise of about 6°C (10.8° F) by 2100—twice the increase anticipated globally, assuming warming continues at a moderate rate.