It is equivalent to 3.5cm of global sea-level rise.

BBC: Canadian glaciers face 'big losses'

The team has calculated that Alaskan glaciers are responsible for at least 9% of the global sea-level rise during the past century, and Alaska's glaciers raise the level of Earth's oceans by more than one-tenth of a millimetre each year.

BBC: Alaskan glaciers melting faster

"If you extrapolate these results, Greenland is going to be a serious contributor to global sea-level rise" in coming years, said Peter Wadhams, a professor of ocean physics at the University of Cambridge, England, who wasn't involved in the Science study.

WSJ: Polar Ice Sheets Melt at Faster Pace

IPCC's worst-case scenario, which is about a 7 degree Fahrenheit rise in temperature, shows a global sea level gain of 10 to 23 inches.

NPR: In a Strategic Reversal, Dutch Embrace Floods