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The last remaining stable portion of the Greenland ice sheet is stable no more, an international team of scientists has discovered. The finding will likely boost estimates of expected global sea level rise in the future.
The new result focuses on ice loss due to a major retreat of an outlet glacier connected to a long “river” of ice, known as an ice stream, that drains ice from the interior of the ice sheet. The Zachariae ice stream retreated about 20 kilometers (12.4 miles) over the last decade, the researchers concluded. For comparison, one of the fastest moving glaciers, the Jakobshavn ice stream in southwest Greenland, has retreated 35 kilometers (21.7 miles) over the last 150 years…