A previous post 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. Now in May, the sea ice extent matched the 14-year average on day 144, tracking alongside until month end. Surprisingly SII (Sea Ice Index) is showing ~400k km2 more ice, which is also ~70k km2 higher than the 14-year average for SII on day 151 (not shown in chart).
Note that on the 14-year average, May loses ~2M km2 of ice extent, which 2021 matched, as did 2007. Both 2020 and 2019 finished lower than average, by 300k and 400k respectively. In contrast SII shows a May loss of only 1.3M km2.
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 | 2021151 | Day 151 Average | 2021-Ave. | 2007151 | 2021-2007 |
| (0) Northern_Hemisphere | 11605537 | 11733260 | -127723 | 11846659 | -241122 |
| (1) Beaufort_Sea | 1034779 | 992955 | 41825 | 1059461 | -24682 |
| (2) Chukchi_Sea | 900868 | 861978 | 38891 | 894617 | 6251 |
| (3) East_Siberian_Sea | 1051959 | 1065828 | -13869 | 1069198 | -17239 |
| (4) Laptev_Sea | 738294 | 831217 | -92923 | 754651 | -16357 |
| (5) Kara_Sea | 824068 | 831440 | -7373 | 895678 | -71610 |
| (6) Barents_Sea | 325745 | 322981 | 2765 | 323801 | 1944 |
| (7) Greenland_Sea | 615174 | 567365 | 47810 | 591919 | 23255 |
| (8) Baffin_Bay_Gulf_of_St._Lawrence | 812548 | 908759 | -96211 | 934257 | -121709 |
| (9) Canadian_Archipelago | 811040 | 811378 | -338 | 818055 | -7015 |
| (10) Hudson_Bay | 1084892 | 1098368 | -13476 | 1077744 | 7148 |
| (11) Central_Arctic | 3232324 | 3219180 | 13144 | 3230109 | 2215 |
| (12) Bering_Sea | 89124 | 122512 | -33388 | 112353 | -23228 |
| (13) Baltic_Sea | 0 | 161 | -161 | 0 | 0 |
| (14) Sea_of_Okhotsk | 83572 | 97612 | -14040 | 83076 | 495 |
The overall deficit to average happened yesterday, being an extent 1% lower, and two days earlier than average. The largest deficits to average are in Baffin Bay and Laptev Sea, along with Bering and Okhotsk. These are partly offset by surpluses elsewhere, mostly in Beaufort, Chukchi, and Greenland Seas.
via Science Matters
June 1, 2021
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