Sea ice just set another record low—in winter—offering new evidence that the era of the ‘New Arctic’ is here

And what’s happening in the New Arctic is not staying there

Another month, yet another record low for Arctic sea ice extent in a warming world.

January’s average ice extent in the Arctic was 525,000 square miles below the 1981-to-2010 average, making it the lowest January extent in the satellite record. This is an astonishingly large loss of ice — equivalent to 80 percent of Alaska.

But what happened in January was equally, if not more significant, for its timing. It happened when the

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