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From 1988 until a few years ago, a lot of multi-year ice was getting transported into the North Atlantic during the winter. This caused a large drop in the thickness of the ice.
What they don’t want to talk about is that this pattern has reversed. The amount of multi-year ice is increasing since 2008, and during this past winter almost all of it moved west towards the Beaufort Sea, where it will slow summer melt.
http://www7320.nrlssc.navy.mil/hycomARC/navo/arcticictn_nowcast_anim30d.gif
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