Fear Not for Arctic Ice Mid August 2021

Arctic2021226

The graph above shows mid July to mid August daily ice extents for 2021 compared to 14 year averages, and some years of note.

The black line shows during this period on average Arctic ice extents decline from ~8.3M km2 down to ~5.9M km2.  The 2021 cyan MASIE line started ~400k km2 below average but as of yesterday was slightly surplus.  The Sea Ice Index in orange (SII from NOAA) started with a deficit to MASIE (in cyan) of ~300M km2.  August 14 saw the two indices mid August close together, close to average and surplus to 2007. 

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 across the Arctic Regions, on average, this year and 2007.

Region 2021226 Day 226 Average 2021-Ave. 2007226 2021-2007
 (0) Northern_Hemisphere 6066634 5889687  176947  5727937 338697 
 (1) Beaufort_Sea 915133 688804  226329  777766 137366 
 (2) Chukchi_Sea 572339 404505  167834  260048 312290 
 (3) East_Siberian_Sea 624917 556990  67927  196982 427934 
 (4) Laptev_Sea 52213 252434  -200221  316363 -264150 
 (5) Kara_Sea 173342 88626  84716  201115 -27772 
 (6) Barents_Sea 5256 29027  -23771  17324 -12068 
 (7) Greenland_Sea 118995 224977  -105982  316155 -197160 
 (8) Baffin_Bay_Gulf_of_St._Lawrence 23528 59670  -36142  86165 -62637 
 (9) Canadian_Archipelago 465880 420722  45157  375241 90638 
 (10) Hudson_Bay 83051 74370  8681  91653 -8603 
 (11) Central_Arctic 3031058 3088557  -57499  3087868 -56810 

The overall surplus to average is 177k km2, (3%).  Note large surpluses of ice in BCE (Beaufort, Chukchi and East Siberian seas).  Meanwhile Laptev on the Russian coast melted out early, as has Greenland Sea.  Kara and CAA (Canadian Arctic Archipelago) are holding considerable ice.  We are about a month away from the annual minimum mid September, but at this point it does not appear it will be out of the ordinary.

bathymetric_map_arctic_ocean

 

 

 

 

via Science Matters

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August 15, 2021 at 02:51PM

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