Daily Archives: October 4, 2011

Arctic Sea Ice 2011, 2012

The numbers are in from the National Snow and Ice Data Center (NSIDC) for Arctic sea ice extent and area in September 2011. The average September extent came in at 4.61 million square kilometers. It was back in October of 2010 that I predicted this year’s September extent would be 4.63 million square kilometers. That prediction turned out to be right on the money.

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