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Mass loss of the Antarctic Ice Sheet has been driven primarily by the thinning of the floating ice shelves that fringe the ice sheet1, reducing their buttressing potential and causing land ice to accelerate into the ocean2. Observations of ice-shelf thickness change by satellite altimetry stretch back only to 1992 (refs. 1,3–5) and previous information about thinning remains unquantified. However, extending the record of ice-shelf thickness change is possible by proxy, by measuring the change in area of the surface expression of pinning points—local bathymetric highs on which ice shelves are anchored6. Here we measure pinning-point change over three epochs spanning the periods 1973–1989, 1989–2000 and 2000−2022, and thus by proxy infer changes to ice-shelf thickness back to 1973–1989. We show that only small localized pockets of ice shelves were thinning between 1973 and 1989, located primarily in the Amundsen Sea Embayment and the Wil ....
Antarctica's Ice Shelves Reduced Over 40 Percent in 25 Yrs. Study indiawest.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from indiawest.com Daily Mail and Mail on Sunday newspapers.
Satellite observations of Antarctic ice shelves reveal a dramatic loss of ice, with 74 trillion tons of water released into the ocean since 1997 — evidence of climate change's impact on the region. ....
Antarctic ice shelves losing volume: What does it mean? earthsky.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from earthsky.org Daily Mail and Mail on Sunday newspapers.