April Arctic Ice Melting as Usual

Science Matters

The image above shows springtime melting of Arctic sea ice extent over the month of April 2020.  As usual the process of declining ice extent follows a LIFO pattern:  Last In First Out.  That is, the marginal seas are the last to freeze and the first to melt.  Thus at the top of the image, the Pacific basins of Bering and Okohtsk seas show a steady decline in ice.  Meanwhile at bottom left, Baffin Bay ice retreats from south to north.  Note center left Hudson Bay loses very little ice during the month.  The central mass of Arctic ice is  intact with some fluctuations back and forth bottom right, as patches of water appear in Barents and Kara Seas.

The graph below shows the ice extent retreating during April compared to some other years and the 13 year average (2007 to 2019 inclusive).

Note that the  MASIE NH ice extent…

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