Tuesday, September 10, 2013

Global Cooling?

This article in The Telegraph seemed to get a lot of attention.  Only two sources are named.  Sea ice extent has rebounded from last year's record low in the Arctic.  But ice extent is comparable to 2009 and remains far below the average for 1981 to 2010.  "Global cooling" conclusions are not justified.


Update (September 14):  Arctic sea ice volume reached a new low for winter earlier this year.


Update (September 22):  Five reasons why sea ice decline should be front page news.

Update (December 16):  Arctic sea ice volume at the end of summer 2013 was fifty percent higher than one year previous.  But this minimum volume is still far below typical values from 30 years ago.

Update (September 21, 2014):  Arctic sea ice minimum is about the same this year as last year. But the trend is clear and Cambridge University professor of ocean physics Peter Wadhams says, "The Arctic ice cap is in a death spiral."

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