Arctic Ice December 14

Click on image to enlarge.

In the first two weeks of December we can see Chukchi at the left filling in with only 8% open water remaining, and Bering starting to freeze. On the right,  Hudson bay is almost fully iced, while Baffin is freezing toward Greenland.  Maximum ice is showing in CAA (Canadian Archipelago), Beaufort, East Siberian, Central Arctic, Laptev and Kara.

Arctic Ice Extents have reached 12M km2, up from 4.6M km2 at Sept. minimum.  This means 50% of the annual maximum has been gained, with 20% of ice cover to be added in the three months before mid March.

The graph compares extents over the first 14 days of December.

2017 has reached 12M km2, close to the 10 year average, while 2012 has recovered with a surplus.  2016 is about 260k km2 behind and 2007 lags by 520k km2.  At this point MASIE and SII are both tracking the 10-year average, with SII about 200k km2 lower.

The Table below shows where ice is located on day 348 in regions of the Arctic ocean. 10 year average comes from 2007 through 2016 inclusive.

Region 2017348 Day 348
Average
2017-Ave. 2007348 2017-2007
 (0) Northern_Hemisphere 12022146 12157670 -135524 11501915 520231
 (1) Beaufort_Sea 1070445 1069521 924 1062676 7769
 (2) Chukchi_Sea 885792 936900 -51108 725062 160730
 (3) East_Siberian_Sea 1087120 1083777 3343 1053584 33536
 (4) Laptev_Sea 897845 897832 12 897845 0
 (5) Kara_Sea 910407 848042 62365 800920 109487
 (6) Barents_Sea 229984 354383 -124399 236964 -6980
 (7) Greenland_Sea 523005 558656 -35652 488595 34409
 (8) Baffin_Bay_Gulf_of_St._Lawrence 835323 825678 9645 793616 41707
 (9) Canadian_Archipelago 853109 853052 57 852556 553
 (10) Hudson_Bay 1168358 1072919 95439 1217263 -48905
 (11) Central_Arctic 3169716 3212523 -42808 3186190 -16475
 (12) Bering_Sea 128315 248645 -120329 54836 73479
 (13) Baltic_Sea 3933 10542 -6609 2898 1035
 (14) Sea_of_Okhotsk 245912 178060 67853 127576 118336


The deficits to average are primarily in Barents and Bering Seas. Surpluses are large in Hudson Bay, Okhotsk and Kara Seas.  Compared to 2007, most seas are in surplus, with only Hudson Bay slightly late.

Footnote

Some people unhappy with the higher amounts of ice extent shown by MASIE continue to claim that Sea Ice Index is the only dataset that can be used. This is false in fact and in logic. Why should anyone accept that the highest quality picture of ice day to day has no shelf life, that one year’s charts can not be compared with another year? Researchers do this analysis, including Walt Meier in charge of Sea Ice Index. That said, I understand his interest in directing people to use his product rather than one he does not control. As I have said before:

MASIE is rigorous, reliable, serves as calibration for satellite products, and uses modern technologies to continue the long and honorable tradition of naval ice charting.  More on this at my post Support MASIE Arctic Ice Dataset

when-al-gore-was-born-there-were-7000-polar-bears

One comment

  1. angech · December 17, 2017

    29,999 Polar Bears as of recent times I believe!
    Thanks for the updates.
    Fingers crossed for an upsurge somewhere, anywhere in the next 3 months please.
    La Nina hint of developing would help as well.

    Like

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