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Posted Wed Jan 13 2010: from
NASA:
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Antarctica Losing 24 cubic miles per year, and growing http://apocadocs.com/s.pl?1263401258
Gravity data collected from space using NASA's Grace satellite show that Antarctica has been losing more than a hundred cubic kilometers (24 cubic miles) of ice each year since 2002. The latest data reveal that Antarctica is losing ice at an accelerating rate, too. How is it possible for surface melting to decrease, but for the continent to lose mass anyway? The answer boils down to the fact that ice can flow without melting.... Isabella Velicogna of JPL and the University of California, Irvine, uses Grace data to weigh the Antarctic ice sheet from space. Her work shows that the ice sheet is not only losing mass, but it is losing mass at an accelerating rate. "The important message is that it is not a linear trend. A linear trend means you have the same mass loss every year. The fact that it's above linear, this is the important idea, that ice loss is increasing with time," she says. And she points out that it isn't just the Grace data that show accelerating loss; the radar data do, too. "It isn't just one type of measurement. It's a series of independent measurements that are giving the same results, which makes it more robust."
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[Read more stories about:
arctic meltdown, ocean warming, rising sea level]
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'Doc Michael says:
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I thought Antarctica was the opposite of Arctica.
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