Rain fell at the highest point on the Greenland ice sheet last week for the first time on record, another worrying sign of warming for the ice sheet already melting at an increasing rate, scientists said on Friday. "That's not a healthy sign for an ice sheet," said Indrani Das, a glaciologist with Columbia University's Lamont-Doherty Earth Observatory. "Water on ice is bad. … It makes the ice sheet more prone to surface melt." Not only is water warmer than the usual snow, it's also darker -- so it absorbs more sunlight rather than reflecting it away. A satellite image shows Nuuk Fjord, Greenland July 29, 2021. European Union, Copernicus Sentinel-2 imagery - Processed by @DEFIS_EU/Handout via REUTERS That meltwater is streaming into the ocean, causing sea levels to rise. Alread...
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