Arctic Sea Ice Extent Sept. 28, 2013 higher than 2009, 2010, 2011 and 2012, DMI Center for Ocean and Ice, min. 15% ice concentration

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9/28/13, Arctic Sea Ice Extent, DMI Center for Ocean and Ice. Thick black line denotes 2013, higher than 2009, 2010, 2011, and 2012:

"Sea ice extent in recent years for the northern hemisphere.
                       The grey shaded area corresponds to the climate mean
                       plus/minus 1 standard deviation."

"The plot above replaces an earlier sea ice extent plot, that was based on data with the coastal zones masked out. This coastal mask implied that the previous sea ice extent estimates were underestimated. The new plot displays absolute sea ice extent estimates. The old plot can still be viewed here for a while."

"The ice extent values are calculated from the ice type data from the Ocean and Sea Ice, Satellite Application Facility (OSISAF), where areas with ice concentration higher than 15% are classified as ice.

The total area of sea ice is the sum of First Year Ice (FYI), Multi Year Ice (MYI) and the area of ambiguous ice types, from the OSISAF ice type product. The total sea ice extent can differ slightly from other sea ice extent estimates. Possible differences between this sea ice extent estimate and others are most likely caused by differences in algorithms and definitions. Some time in 2013 sea ice climatology and anomaly data will become available here." via Paul Homewood

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9/29/13, "Arctic Ice Growing Fast," Paul Homewood, Not a lot of people know that

http://ocean.dmi.dk/arctic/icecover.uk.php

"Having effectively tied with 2009 for the highest minimum since 2006, Arctic ice extent is now refreezing, and is now well above the 2009 level, according to DMI.

NSIDC figures also show current extent to be 50,000 sq km above the same day in 2009. More significantly, it is within 10,000 sq km of the 2005 figure.

More at the end of the month." via Climate Depot


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