2009-05 Sea Ice Age
These images show declining sea ice age, which indicates a thinning Arctic sea ice cover more vulnerable to melting in summer. Ice older than two years now accounts for less than 10% of the ice cover. http://www.nsidc.org/arcticseaicenews/2009/040609.html - http://www.nsidc.org/images/arcticseaicenews/20090406_Figure5.png
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