Arctic Ice Bottoms at 3.7 Wadhams

Science Matters

The animation above shows Arctic ice extents from Sept. 1 to 16, 2020.  On the left are the Russian shelf seas already ice-free, and the Central Arctic retreating as well. Bottom left is Beaufort Sea losing ice. In the last week CAA in the center starts refreezing, and just above it Baffin Bay starts to add ice back.  At the top right Greenland Sea starts to refreeze.

Prof. Peter Wadhams made multiple predictions of an ice-free Arctic (extent as low as 1M km2), most recently to happen in 2015.  Thus was born the metric: 1 Wadham = 1M km2 Arctic ice extent. The details are provided on 2020 minimum below.  Though there could be a dip lower in the next few days, the record shows a daily minimum of 3.7M km2 on September 11 (MASIE) and September 13 (SII).  While BCE (Beaufort, Chukchi, East Siberian seas) may lose more ice, …

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