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Ice sheet melting faster than ever

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Wonder what the world would look like if the Greenland ice sheet melted? Many of the coastlines around North America, including the Arctic could be flooded, as this image from resumbrae.com shows.

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These measurements came from NASA’s Grace (Gravity Recovery and Climate Experiment) satellite, which was launched in 2002.

Grace also detected a loss of ice from Greenland’s glaciers, although these measurements weren’t part of the study.

The new figure for melt is about three times higher than an earlier estimate of the loss from Greenland’s ice sheet, which was made using the first two years of Grace measurements.

“Acceleration of mass loss over Greenland, if confirmed, would be consistent with proposed increased global warming in recent years,” the authors wrote last week in Science.

If the ice cap completely disappears, global sea levels would rise by 6.5 m.

Most of the ice is being lost from eastern Greenland, says the article in Science.

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