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August 21, 2020 03:30 am

Greenland Lost 586 Billion Tons of Ice In 2019

An anonymous reader quotes a report from The Associated Press: Greenland lost a record amount of ice during an extra warm 2019, with the melt massive enough to cover California in more than four feet (1.25 meters) of water, a new study said. After two years when summer ice melt had been minimal, last summer shattered all records with 586 billion tons (532 billion metric tons) of ice melting, according to satellite measurements reported in a study Thursday. That's more than 140 trillion gallons (532 trillion liters) of water. That's far more than the yearly average loss of 259 billion tons (235 billion metric tons) since 2003 and easily surpasses the old record of 511 billion tons (464 billion metric tons) in 2012, said a study in Communications Earth & Environment. The study showed that in the 20th century, there were many years when Greenland gained ice. "Not only is the Greenland ice sheet melting, but it's melting at a faster and faster pace," said study lead author Ingo Sasgen, a geoscientist at the Alfred Wegener Institute in Germany. Last year's Greenland melt added 0.06 inches (1.5 millimeters) to global sea level rise. That sounds like a tiny amount but "in our world it's huge, that's astounding," said study co-author Alex Gardner, a NASA ice scientist. Add in more water from melting in other ice sheets and glaciers, along with an ocean that expands as it warms -- and that translates into slowly rising sea levels, coastal flooding and other problems, he said.

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