Typical Arctic Ice Extents in June

 

 

Arctic2021181

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:

post-glacial_sea_level
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
 (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

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July 1, 2021 at 10:06AM

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