Ancient Antarctic Ice Shelf Nearing Complete Collapse

In 2002, two-thirds of the Larsen B Ice Shelf, located along the east coast of the Antarctic Peninsula, collapsed in a span of less than six weeks. According to a new NASA study, the remains of this ancient structure, which has existed for over 10,000 years, are likely to disintegrate completely before the end of the decade -- an event that would significantly contribute to global sea level rise.

“These are warning signs that the remnant is disintegrating,” Ala Khazendar from NASA's Jet Propulsion Laboratory in Pasadena, California, who led the study, said in a statement. “Although it’s fascinating scientifically to have a front-row seat to watch the ice shelf becoming unstable and breaking up, it’s bad news for our planet.”

Several recent studies have spotted an uptick in the melting of Antarctica’s floating ice shelves, which act as doorstops and hold back its glaciers and ice sheets from spreading outward into oceans. In some regions, the thickness of these shelves has fallen by as much as 18 percent over the past 18 years -- a process that has accelerated over the last decade.

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