'Devastating' melt of Greenland, Antarcticicesheets found
Using 50 different satellite estimates, researchers found that Greenland's melt has gone into hyperdrive in the last few years. Greenland's average annual melt from 2017 to 2020 was 20% more a year than at the beginning of the decade and more than seven times higher than its annual shrinkage in the early 1990s.
From 1992 to 1996, the two ice sheets—which hold 99% of the world's freshwater ice—were shrinking by 116 billion tons a year, two-thirds of it from Antarctica. But because the world's oceans are so huge, the melt just from the ice sheets since 1992 still only adds up to a little less than inch of sea level rise, on average. Globally sea level rise is accelerating and melt from ice sheets has gone from contributing 5% of the
Antarctica from 2017 to 2020 is still losing about 127 billion tons of ice a year, down 23% from earlier in the decade, but overall up 64% from the early 1990s.from Greenland is outpacing that from Antarctica, there are troublesome wild cards in the south, notably behavior of the Thwaites glacier," which is nicknamed the Doomsday Glacier, said Mark Serreze, director of the U.S. snow and ice center, who wasn't part of the study.
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