This year’s low is 405,000 square miles below the 1981 to 2010 average minimum extent of sea ice around Antarctica, according to the National Snow and Ice Data Center. That amount of ice loss is equivalent to more than half of the land area of Alaska.
An aerial view of the edge of the Thwaites Ice Shelf in Antarctica. Shrinking of sea ice abutting the ice shelf exposes it to pounding waves. The extent of sea ice around Antarctica has reached a record low level — for the second Southern Hemisphere summer in a row.
As Antarctic sea ice shrivels, it opens the way for waves to violently pound ice shelves that hold back the flow of giant glaciers — some of which are already at risk of disintegrating and contributing significantly to sea level rise, according to the NSIDC.
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