Current weak spots in Greenland's ice sheet have been weak for thousands of years

Earlier recent work has shown that the east, southeast and northwest regions of the Greenland ice sheet have contributed to 77% of the total mass loss over the last century. Now, researchers have used GPS data to show that the east, southeast and northwest also contributed significantly to ice mass loss in the past, over thousands of years: about 40% of the total loss of ice mass.

from Oceanography News -- ScienceDaily http://ift.tt/2cHI3AB
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