Mediocre Arctic Ice August 15

 

20160815google3

Imagery date refers to Google Earth capture of land forms. Ice edges are dated August 15, 2016 from MASIE. Click on image to zoom in.

In the chart below MASIE shows 2016 August Arctic ice extent drew near to average and close to 2015, then dropped lower before leveling off a bit yesterday.  Presently mid-August is about 400k less than average and 2015.  With SII back on line, it was reporting similar extents during June (as it has in the past).  This month it is starting to underestimate again, ~200k km2 lower. (SII and MASIE comparison is here.)

MASIE 2016 day228

 

Looking into the details, some marginal seas are melting earlier than last year, while the central, enduring ice pack is relatively typical for this time of year.

At the present pace of declining ice extents, 2016 is running 3 days ahead of 2015 and 6 days in advance of the ten-year average.

Comparing the Arctic ice extents with their maximums shows the melting is occurring mostly in the marginal seas:   Down the most are Beaufort, E. Siberian and Kara seas, with Laptev higher.  Chukchi and Central Arctic are also slightly higher.

Region 2016228 Day 228 Average 2016-Ave.
 (0) Northern_Hemisphere 5638938 6077428 -438491
 (1) Beaufort_Sea 460422 732896 -272475
 (2) Chukchi_Sea 460556 451013 9543
 (3) East_Siberian_Sea 425918 614576 -188658
 (4) Laptev_Sea 436021 258060 177960
 (5) Kara_Sea 34418 113901 -79483
 (6) Barents_Sea 0 28263 -28263
 (7) Greenland_Sea 210175 250577 -40402
 (8) Baffin_Bay_Gulf_of_St._Lawrence 43329 50525 -7196
 (9) Canadian_Archipelago 394745 402828 -8083
 (10) Hudson_Bay 50896 72085 -21188
 (11) Central_Arctic 3121317 3101598 19719
 (12) Bering_Sea 0 23 -23
 (13) Baltic_Sea 0 2 -2
 (14) Sea_of_Okhotsk 0 29 -29

Presently Arctic Ice extent is down from its March maximum by 62.6%.  The bulk of ice losses are coming from Okhotsk, Barents and Bering Seas (100% melted), along with Kara Sea, Hudson Bay and Baffin Bay-St. Lawrence (96+% melted).  All of them are marginal seas that will go down close to zero by September.

For more context on Arctic ice extent see Arctic Ice Watch July 31.  For those who wish to browse Arctic ice in Google Earth, the procedure is simple.  Go to MASIE homepage and download the kmz file.  Clicking on the file should open it in Google Earth (presuming it is on your computer.) Then you can browse, zoom in and out, and take images.

 

 

 

 

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