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In the end, it will just melt away quite suddenly. It might not be as early as 2013 but it will be soon, much earlier than 2040.

"Arctic summers ice-free 'by 2013'". news.bbc.co.uk. December 12, 2007.
In the end, it will just melt away quite suddenly. It might not be as early as 2013 but it will be soon, much earlier than 2040.