Second dramatic spike in thawing on the Greenland ice sheet heralds an early start to the melt season

The Arctic will “go through hell this year,” says one prominent scientist

| Note: This story was updated on 5/16/2016 at 7 p.m. EDT with comments from Ted Scambos of the National Sea and Ice Data Center. |

On April 11, a dramatic early spike in melting of snow and ice at the surface of Greenland’s ice sheet prompted a Danish climate scientist to say that she and her colleagues were “incredulous.”

Now, there has been a second bout of unusual melting.

You can see both of them in the

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