Why is Antarctic sea ice expanding?


Grist

While ice cover in the Arctic continues its downward spiral, something counterintuitive is happening in the Antarctic.

The thin crust of sea ice floating around Antarctica expanded this year to cover more of the Southern Ocean than ever before recorded: 7.518 million square miles. That broke the previous record of 7.505 million square miles, which was set just last year, according to NASA.

“We set a record high winter maximum,” Walt Meier, a NASA glaciologist, said in announcing the findings. “Even though it is a record high, it is only 3.6 percent above the 1981 to 2010 average maximum.”

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