March Arctic Ice Plentiful

Previous posts showed 2020 Arctic Ice breaking the 15M km2 ceiling mid March before starting the Spring melt as usual later in the month. The graph above shows that the March monthly average has varied little since 2007, typically around the SII average of 14.7 Mkm2 +/-  a few %.  Of course there are regional differences as described below.

The graph above shows ice extent through March comparing 2020 MASIE reports with the 13-year average, other recent years and with SII.  After exceeding the average the first half, extents fell off the last 10 days, principally due to melting in the Pacfic basins of Bering and Okhotsk.

The table below shows the distribution of sea ice across the Arctic regions.

Region 2020091 Day 091 Average 2020-Ave. 2007091 2020-2007
 (0) Northern_Hemisphere 14282630 14713851 -431221 14158467 124163
 (1) Beaufort_Sea 1070655 1070176 479 1069711 944
 (2) Chukchi_Sea 963163 963149 14 966006 -2844
 (3) East_Siberian_Sea 1086324 1086066 258 1074213 12111
 (4) Laptev_Sea 897668 895482 2186 867162 30506
 (5) Kara_Sea 928986 916178 12808 908181 20805
 (6) Barents_Sea 688659 648978 39681 469156 219503
 (7) Greenland_Sea 709503 656533 52970 670061 39442
 (8) Baffin_Bay_Gulf_of_St._Lawrence 1320493 439783 -119290 1232093 88399
 (9) Canadian_Archipelago 854282 852731 1552 849011 5271
 (10) Hudson_Bay 1260152 1254854 5298 1229963 30189
 (11) Central_Arctic 3248013 3235482 12531 3245424 2589
 (12) Bering_Sea 484084 744587 -260503 721969 -237885
 (13) Baltic_Sea 8975 65202 -56227 45656 -36682
 (14) Sea_of_Okhotsk 753705 874501 -120796 797516 -43812

Overall NH extent March 31 was below average by 431k km2, or 3%.  The bulk of the deficit is seen in Bering and Okhotsk seas, along with Baffin Bay.  Everywhere else is slightly surplus, with the exception of the Baltic, which never froze completely this year.

5 comments

  1. Jack Broughton · April 1

    I don’t know much about arctic ice and enjoy your reports.
    Do you have data for the ice extents further back, and for how long have measurements been made?

    Like

  2. Hifast · April 2

    Reblogged this on Climate Collections.

    Like

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