Arctic Ice Aplenty Nov. 30, 2021

The animation shows Arctic ice extents from day 304 (end of October) to day 334, Nov.30, 2021. On the right side are the Euro-Russian seas already frozen over end of October.  At the bottom right Kara Sea fills in to >90%, while Barents (left of Kara) adds nearly 400k km2 to reach 60% of March maximum. Dramatically, at the top center Chukchi freezes over and Bering Sea grows ~300k km2 of ice extent.  On the far left Hudson Bay shows its delayed freezing this year, with some western shore ice appearing only in the last 10 days. Meanwhile, Greenland Sea (lower left) added 480k km2 of ice extent.  The graph below shows November daily ice extents for 2021 compared to 14 year averages, and some years of note.

The black line shows during October on average Arctic ice extents increase ~2.5M km2 from ~8.5M km2 up to ~11M km2.  The 2021 cyan MASIE line started the month 163k km2 above average and on day 334 showed a surplus of  215k km2.  The Sea Ice Index in orange (SII from NOAA) started with the same deficit, then lagged behind through the month, before ending ~200k km2 lower than MASIE. (No SII data yet for day 334). 2019 and 2020 were well below average at this stage of the ice recovery.

 

Why is this important?  All the claims of global climate emergency depend on dangerously higher temperatures, lower sea ice, and rising sea levels.  The lack of additional warming is documented in a post Adios, Global Warming

The lack of acceleration in sea levels along coastlines has been discussed also.  See USCS Warnings of Coastal Flooding

Also, a longer term perspective is informative:

post-glacial_sea_levelThe table below shows the distribution of Sea Ice on day 334 across the Arctic Regions, on average, this year and 2020.

Region 2021334 Day 334 Average 2021-Ave. 2020334 2021-2020
 (0) Northern_Hemisphere 11171831 10976208 195623 10207244 964587
 (1) Beaufort_Sea 1070776 1069252 1524 1070689 87
 (2) Chukchi_Sea 966006 781701 184305 601423 364584
 (3) East_Siberian_Sea 1087085 1082808 4277 1075464 11621
 (4) Laptev_Sea 897827 897818 9 897827 0
 (5) Kara_Sea 874105 789034 85071 470654 403451
 (6) Barents_Sea 445466 252273 193193 56772 388695
 (7) Greenland_Sea 468845 543650 -74805 577314 -108469
 (8) Baffin_Bay_Gulf_of_St._Lawrence 606454 680452 -73998 608255 -1802
 (9) Canadian_Archipelago 854668 853089 1579 854597 71
 (10) Hudson_Bay 307719 615274 -307555 803363 -495644
 (11) Central_Arctic 3208675 3195024 13651 3118738 89936
 (12) Bering_Sea 335645 140327 195318 39284 296361
 (13) Baltic_Sea 6666 3698 2969 0 6666
 (14) Sea_of_Okhotsk 34960 67733 -32773 31397 3563

The overall surplus to average is 196k km2, (2%).  Note the large surpluses of ice in Chukchi and Bering Seas, partly offset by deficits in Greenland Sea and Baffin bay. The largest deficit is Hudson Bay, a shallow basin that should freeze over in coming weeks, adding nearly 1M km2 when it does. Note that 2021 ice extent exceeds that of 2020 by almost a full Wadham, 965k km2, most of the surplus being in Chukchi, Bering, Kara and Barents Seas.

bathymetric_map_arctic_ocean

Illustration by Eleanor Lutz shows Earth’s seasonal climate changes. If played in full screen, the four corners present views from top, bottom and sides. It is a visual representation of scientific datasets measuring Arctic ice extents.

via Science Matters

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December 1, 2021 at 10:40AM

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