Arctic Gains Ice in October

 

Arc2018290to304Big Chill in last Two Weeks

The major growth in ice extent came in the Russian basins (right side).  The image above shows massive gains in ice extent in East Siberian and Laptev seas. East Siberian added 460k km2 for a total of 895, or 82% of last March maximum.  Laptev was mostly open water in September, but added 600k km2 in the last two weeks for a total of 700k km2 or 78% of last March maximum. With the Canadian Arctic on the left already frozen over, the gains were smaller, limited to northern Hudson Bay (top left) and Baffin Bay filling in from the north.

Arctic2018304

The graph shows MASIE reporting ice extents totaling 8.2M km2 yesterday,  400k km2 below the 11 year average (2007 to 2017 inclusive).  Note how 2018 started October on average, then went fairly flat the first week or so, falling 900k km2 below average.  Recent gains in ice extent exceed average gains, closing the gap.  Presently, 2018 is three days behind the average, matching 2007 and tracking above 2016 and 2012. NOAA’s Sea Ice Index matched MASIE throughout October.

ims2018304_alaska

The current IMS Snow and Ice Chart shows how snow is covering Siberia completely, and has spread over northern and eastern canada.

The table below shows the regional distribution of Arctic ice extents.

Region 2018304 Day 304 
Average
2018-Ave. 2007304 2018-2007
 (0) Northern_Hemisphere 8167466 8561136 -393671 8175072 -7606
 (1) Beaufort_Sea 1069285 948751 120534 1038126 31159
 (2) Chukchi_Sea 412073 468794 -56721 242685 169389
 (3) East_Siberian_Sea 894863 954841 -59978 835071 59792
 (4) Laptev_Sea 698238 896167 -197929 887789 -189551
 (5) Kara_Sea 299264 462673 -163409 311960 -12695
 (6) Barents_Sea 4058 81432 -77375 52823 -48765
 (7) Greenland_Sea 341543 416633 -75090 443559 -102016
 (8) Baffin_Bay_Gulf_of_St._Lawrence 427557 271561 155996 289374 138184
 (9) Canadian_Archipelago 823551 789952 33599 817220 6331
 (10) Hudson_Bay 131284 85823 45461 48845 82439
 (11) Central_Arctic 3063891 3173126 -109235 3206345 -142454

The deficits are mainly on the Russian and European seas, only partly offset by surpluses in Beaufort, CAA, Baffin and Hudson Bays.

algore_ice_gone_by_2013

 

 

via Science Matters

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November 1, 2018 at 10:35AM

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