Extent of sea ice in the Arctic Ocean since 1979.

The extend of sea ice in the Arctic Ocean has decreased at a rate of 7.4% per decade. "This graph shows monthly ice extent anomalies plotted as a time series of percent difference between the extent for the month in question and the mean for that month based on the January 1981 to December 2010 data. The anomaly data points are plotted as plus signs and the trend line is plotted with a dashed grey line" (NSIDC, 2013).



Last updated 05-Dec-2015    © 2015 Peter L. Ward. All Rights Reserved