Greenland Ice Sheet Melting at Dangerous Rate

These images provided by NASA show the extent of surface melt over Greenland’s ice sheet on July 8( left) and July 12 (right). Measurements from three satellites showed that on July 8 , about 40 percent of the ice sheet had undergone thawing at or near the surface. Fours days later, the melting had  accelerated at an alarming rate and an estimated 97 percent of the ice sheet surface had thawed by July 12.

 

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