Friday, 9 June 2017

An update on Arctic Sea Ice - 06/04/2017

Facts About the Arctic in June 2017


4 June, 2017

After a comparatively cool May, surface air temperatures in the high Arctic are back up to “normal”:

DMI-meanT_20170603
The condition of the sea ice north of 80 degrees is far from normal however. Here’s what’s been happening to the (normally) land fast ice north west of Greenland:"
NASA Worldview “true-color” image of the sea ice north west of Greenland breaking up on June 2nd 2017NASA Worldview “true-color” image of the sea ice north west of Greenland breaking up onclass="Apple-converted-space" June 2nd 2017
Further south surface melt has set in across the southern route through the Northwest Passage:
NASA Worldview “false-color” image of the Coronation Gulf on June 1st 2017, derived from the MODIS sensor on the Terra satelliteNASA Worldview “false-color” image of the Coronation Gulf onclass="Apple-converted-space" June 1st 2017, derived from the MODIS sensor on the Terra satellite

Whilst the gap with previous years has narrowed during May, PIOMAS Arctic sea ice volume is still well below all previous years in their records:
piomas-graph-201705
The PIOMAS gridded thickness graph suggests that a large area of thick ice is currently sailing through the Fram Strait to ultimate oblivion:
piomas_gridded_thickness_20170531
Here’s the latest AMSR2 Arctic sea ice area graph:
UH-Arctic-Area-2017-06-02
and just in case melt ponds are now affecting those numbers here is extent as well:
UH-Arctic-Extent-2017-06-02
The rate of decrease is inexorably increasing! 2012 extent is currently still well above that of 2017, but those positions may well be reversed by the end of June? Here’s NSIDC’s view on the matter:
Charctic-20170602

[Edit – June 8th]
As requested by Tommy, here’s the current Arctic Basin sea ice area:UH-Basin-Area-2017-06-07
This includes the Beaufort, Chukchi, East Siberian and Laptev Seas along with the Central Arctic. It excludes the Atlantic periphery, which currently looks like this:UH-Atlantic-Area-2017-06-07
Watch this space!


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