November Arctic Ice Recovery

Science Matters

HB2018320to338Eighteen Days in Hudson Bay are shown in the above animation.  In the lower center, Hudson Bay more than doubled its ice extent up to 1.07M km2, 85% of maximum.  Just to the northeast, Hudson Strait and Ungava Bay are almost frozen over, with Baffin Bay reaching down.  At the top right you can see Greenland Sea ice reaching out toward Iceland.

The remarkable growth of Arctic ice extent in November 2018 overcame the October deficit,  went 400k km2 over the 11 year average and exceeded all but one year in the last decade. The graph below compares the last 12 November ice extents.

Arctic Nov 2007 to 2018

The monthly average of all November days shows 2018 matching the 11 year average, slightly higher than 2007, and 1M km2 greater than 2016.  The graph below shows the daily growth of ice extents throughout November, on average and for some important years.

2018 ice growth…

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