Re-calibration of Arctic sea ice extent datasets using Arctic surface air temperature records
April 30, 2017
The recent decline in Arctic sea ice is not unique, rather it follows temperature trends since the 1970s followed a period of sea ice growth since the mid-1940s, which in turn followed a period of sea ice retreat since the 1910s.
Using a reconstructed data sets from sea ice data sources from the three Arctic regions (North American, Nordic and Siberian) and corresponding surface air temperature trends for the pre-satellite era and satellite data from the post satellite era, the recent period of Arctic sea ice retreat since the 1970s is found not to be unique. It tracks surface temperature and followed a period of sea ice growth from the mid-1940s to the late 1970s once again tracking temperature, which in turn followed a period of sea ice retreat since the 1910s, also tracking temperature.