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2/24/17

Greenland Meltdown Alarms Scientists #okc #news #wth



Now, they are striving to understand the complex feedbacks that are speeding up surface melting. In Greenland, the great melt is on. The decline of Greenland's ice sheet is a familiar story, but until recently, massive calving glaciers that carry ice from the interior and crumble into the sea got most of the attention. Between 2000 and 2008, such "dynamic" changes accounted for about as much mass loss as surface melting and shifts in snowfall. But the balance tipped dramatically between 2011 and 2014, when satellite data and modeling suggested that 70% of the annual 269 billion tons of snow and ice shed by Greenland was lost through surface melt, not calving. The accelerating surface melt has doubled Greenland's contribution to global sea level rise since 1992–2011, to 0.74 mm per year. "Nobody expected the ice sheet to lose so much mass so quickly," says geophysicist Isabella Velicogna of the University of California, Irvine. "Things are happening a lot faster than we expected." ►Circle us on Google + http://goo.gl/TXeBfX ►Subscribe Channel http://goo.gl/mqt0wI ►Don't forget to Like * Comment * Share this video. ----------------------------------------­-------------------------------- Stay tuned, Stay connected


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