Previous posts reported that Arctic Sea Ice has persisted this year despite a wavy Polar Vortex this spring, bringing cold down to mid-latitudes, and warming air into Arctic regions. Then in May and now again in June, the sea ice extent matched or exceeded the 14-year average several times during the month, tracking alongside until month end. Surprisingly SII (Sea Ice Index) showed much more ice the first week, similar extents mid- June, and then SII lost ice more rapidly the final week. Yesterday both SII and MASIE day 181 were close to the same day in 2007.
Note that on the 14-year average, June loses ~2M km2 of ice extent, which 2021 matched, as did 2007. Both 2020 and 2019 finished lower than average, by 500k and 400k respectively.
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 Floodings
Also, a longer term perspective is informative:
The table below shows the distribution of Sea Ice across the Arctic Regions, on average, this year and 2007.
| Region | 2021181 | Day 181 Average | 2021-Ave. | 2007181 | 2021-2007 |
| (0) Northern_Hemisphere | 9644967 | 9741628 | -96661 | 9672969 | -28002 |
| (1) Beaufort_Sea | 999085 | 905769 | 93316 | 939209 | 59876 |
| (2) Chukchi_Sea | 760235 | 715065 | 45170 | 670088 | 90146 |
| (3) East_Siberian_Sea | 924474 | 1010406 | -85932 | 901963 | 22511 |
| (4) Laptev_Sea | 578894 | 703006 | -124112 | 658742 | -79848 |
| (5) Kara_Sea | 527080 | 545919 | -18839 | 657478 | -130398 |
| (6) Barents_Sea | 129619 | 123601 | 6018 | 130101 | -482 |
| (7) Greenland_Sea | 461815 | 501479 | -39664 | 548399 | -86584 |
| (8) Baffin_Bay_Gulf_of_St._Lawrence | 497237 | 504688 | -7451 | 450461 | 46777 |
| (9) Canadian_Archipelago | 761843 | 778224 | -16381 | 773611 | -11768 |
| (10) Hudson_Bay | 736119 | 728550 | 7569 | 718441 | 17678 |
| (11) Central_Arctic | 3239262 | 3205301 | 33960 | 3218999 | 20262 |
| (12) Bering_Sea | 15316 | 4566 | 10750 | 981 | 14336 |
| (13) Baltic_Sea | 0 | 3 | -3 | 0 | 0 |
| (14) Sea_of_Okhotsk | 12919 | 13765 | -847 | 2983 | 9936 |
The overall deficit to average happened yesterday, being an extent 1% lower, and one day earlier than average. The largest deficits to average are in East Siberian and Laptev Seas, along with Greenland Sea. These are partly offset by surpluses elsewhere, mostly in Beaufort, Chukchi, and Central Artic seas.
via Science Matters
July 1, 2021
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