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For the first time NASA scientists have analyzed data from direct, detailed satellite measurements to show that ice losses now far surpass ice gains in the shrinking Greenland ice sheet.
Greenland's massive ice sheet has lost nearly 100 gigatons of ice annually recently, much of it in low-elevation regions along the continent's southeastern coast, including the southern tip . (Credit: NASA MODIS Land Rapid Response Team)
Using a novel technique that reveals regional changes in the weight of the massive ice sheet across the entire continent, scientists at NASA's Goddard Space Flight Center, Greenbelt, Md., report that Greenland's low coastal regions lost 155 gigatons (41 cubic miles) of ice per year between 2003 and 2005 from excess melting and icebergs, while the high-elevation interior gained 54 gigatons (14 cubic miles) annually from excess snowfall. The study appears in Science Express, the advance edition of Science, on Oct. 19.
This year, the Silicon Valley Leadership Group looked at our long-term mission of reducing traffic congestion, supporting public transit, improving energy efficiency, enhancing our environment and increasing housing through smart-growth policies.
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