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Latest Greenland ice sheet Stories

2009-07-07 13:26:00

WASHINGTON, July 7 /PRNewswire-USNewswire/ -- Arctic sea ice thinned dramatically between the winters of 2004 and 2008, with thin seasonal ice replacing thick older ice as the dominant type for the first time on record. The new results, based on data from a NASA Earth-orbiting spacecraft, provide further evidence for the rapid, ongoing transformation of the Arctic's ice cover. (Logo: http://www.newscom.com/cgi-bin/prnh/20081007/38461LOGO) Scientists from NASA and the University of...

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2009-07-07 14:20:00

Arctic sea ice thinned dramatically between the winters of 2004 and 2008, with thin seasonal ice replacing thick older ice as the dominant type for the first time on record. The new results, based on data from a NASA Earth-orbiting spacecraft, provide further evidence for the rapid, ongoing transformation of the Arctic's ice cover. Scientists from NASA and the University of Washington in Seattle conducted the most comprehensive survey to date using observations from NASA's Ice, Cloud and land...

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2009-06-21 12:40:00

Findings are relevant to modern Greenland ice sheet, says UB researcher Modern glaciers, such as those making up the Greenland and Antarctic ice sheets, are capable of undergoing periods of rapid shrinkage or retreat, according to new findings by paleoclimatologists at the University at Buffalo. The paper, published on June 21 in Nature Geoscience, describes fieldwork demonstrating that a prehistoric glacier in the Canadian Arctic rapidly retreated in just a few hundred years. The proof of...

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2009-06-12 08:32:52

The Greenland ice sheet is melting faster than expected according to a new study led by a University of Alaska Fairbanks researcher and published in the journal Hydrological Processes. Study results indicate that the ice sheet may be responsible for nearly 25 percent of global sea rise in the past 13 years. The study also shows that seas now are rising by more than 3 millimeters a year--more than 50 percent faster than the average for the 20th century. UAF researcher Sebastian H. Mernild and...

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2009-05-29 09:30:00

Retrieve longest Arctic sediment record under Siberia's Lake El'gygytgyn A team of scientists from the United States, Germany, Russia and Austria has just returned from a six-month drilling expedition to a frozen lake in Siberia: Lake El'gygytgyn, "Lake E" for short. Lake E was created 3.6 million years ago when a meteor more than a half-mile wide hit Earth and formed an 11-mile wide crater. There, the researchers collected the longest sediment core samples retrieved in the Arctic region....

2009-05-27 11:24:17

Scientists say the ongoing melting of the Greenland ice sheet might drive more water than previously thought toward the U.S. and Canadian coastlines. Scientists led by the National Center for Atmospheric Research said if Greenland's ice melts at a moderate to high rate, ocean circulation by 2100 could shift, raising sea levels at New York, Boston, Halifax and other cities in the northeastern United States and Canada about 12-20 inches more than in other coastal areas. The research builds on...

2009-03-30 13:34:43

The U.S. space agency announced the start Monday of a monthlong Arctic research mission using aircraft to measure the thickness of Greenland's ice sheet. The mission is the first of two National Aeronautics and Space Administration airborne field campaigns in the Arctic to closely inspect the Greenland and Iceland ice sheets and that region's sea ice and glaciers. NASA's Ice, Cloud and land Elevation Satellite, known as ICESat, is completing a seasonal study of the Earth's ice sheets to gauge...

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2009-03-30 14:26:54

Although the International Polar Year officially came to a close in February, NASA is continuing to push the frontiers of polar science from space, the air and the surface of ice. On Monday, NASA embarks on the first of two airborne field campaigns in the Arctic to take a closer look at Greenland and Iceland ice sheets and the region's sea ice and glaciers. From space, NASA's Ice, Cloud, and land Elevation Satellite, known as ICESat, is completing a seasonal survey of the world's ice sheets...

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2009-02-16 15:42:18

The Greenland and Antarctica ice sheets are melting, but the amounts that will melt and the time it will take are still unknown, according to Richard Alley, Evan Pugh professor of geosciences, Penn State. In the past, the Greenland ice sheet has grown when its surroundings cooled, shrunk when its surroundings warmed and even disappeared completely when the temperatures became warm enough. If the ice sheet on Greenland melts, sea level will rise about 23 feet, which will inundate portions of...

2009-02-16 11:04:04

A U.S. geoscientist says although it's known the Greenland and Antarctica ice sheets are melting, how much ice will melt is undetermined. Penn State Professor Richard Alley said if Greenland's ice sheet melts, sea level will rise about 23 feet, which will inundate portions of nearly all continental shores. However, Antarctica, containing much more water, could add another 190 feet to sea level. We do not think that we will lose all, or even most, of Antarctica's ice sheet, said Alley. But...