Ice shelf the size of New York City collapses in previously stable East Antarctica

The collapse, captured by satellite images, marked the first time in human history that the frigid region had an ice shelf collapse. It happened at the beginning of a freakish warm spell last week when temperatures soared more than 70 degrees warmer than normal in some spots of East Antarctica.

The ice shelf, about 460 square miles wide holding in the Conger and Glenzer glaciers from the warmer water, collapsed between March 14 and 16, said ice scientist Catherine Walker of the Woods Hole Oceanographic Institute. She said scientists have never seen this happen in this part of the continent and that makes it worrisome.

The issue isn’t the amount of ice lost in this collapse, Neff and Walker said. It’s negligible. But it’s more about the where it happened. Scientists had been seeing the ice shelf shrink a bit since the 1970s, Neff said. Then in 2020, the shelf’s ice loss sped up to losing about half of itself every month or so, Walker said.

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