"The most detailed satellite information available shows that ice sheets in Greenland and western Antarctica are shrinking faster than scientists thought and in some places are already in runaway melt mode, a new study found….That’s from “Study: ‘Runaway’ melt on Antarctica, Greenland,” the pull-no-punches MSNBC story last month. The full study, “Extensive dynamic thinning on the margins of the Greenland and Antarctic ice sheets,” was published in Nature (subs. req’d, excerpted below)."
Using 50 million laser readings from a NASA satellite, scientists for the first time calculated changes in the height of the vulnerable but massive ice sheets and found them especially worse at their edges. That’s where warmer water eats away from below. In some parts of Antarctica, ice sheets have been losing 30 feet a year in thickness since 2003, according to the study….
“To some extent it’s a runaway effect. The question is how far will it run?” said lead author Hamish Pritchard of the British Antarctic Survey. “It’s more widespread than we previously thought.”
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