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Wynn Dego
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1.75 million km2 The number is a WAG, but my reasoning is that as volume decreases, eventually a point is reached where the ice is so thin, that its resistance to break-up and melting is greatly diminished, and it disappears much more rapidly area-wise than before. I think this is the year, and it's likely the first of a 2 or 3 year descent to zero, i.e. 'ice free summer'.
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Jun 17, 2013