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Latest Ice sheet Stories

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2010-06-30 07:05:00

To the untrained eye, University of Colorado at Boulder Research Associate Craig Lee's recent discovery of a 10,000-year-old wooden hunting weapon might look like a small branch that blew off a tree in a windstorm. Nothing could be further from the truth, according to Lee, a research associate with CU-Boulder's Institute of Arctic and Alpine Research who found the atlatl dart, a spear-like hunting weapon, melting out of an ice patch high in the Rocky Mountains close to Yellowstone National...

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2010-06-21 06:00:00

A robotic yellow submarine that has been launched deep beneath the Pine Island Glacier has helped to solve a mystery about one of Antarctica's fastest-melting glaciers, adding to unease about how climate change may lead to higher world sea levels, scientists reported on Sunday in the journal Nature Geoscience. Scientists captured ocean and sea-floor measurements using the robotic submarine, called Autosub. The team found that the glacier was no longer resting on a sub-sea ridge that had...

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2010-05-18 13:25:00

Scientists from the University of Miami are surprised at how rapidly the ice is melting in Greenland and how quickly the land is rising in response. Their findings are published in Nature Geoscience. Greenland is situated in the Atlantic Ocean to the northeast of Canada. It has stunning fjords on its rocky coast formed by moving glaciers, and a dense icecap up to 2 km thick that covers much of the island--pressing down the land beneath and lowering its elevation. Now, scientists at the...

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2010-04-28 13:36:49

Scientists have discovered that changes in the amount of ice floating in the polar oceans are causing sea levels to rise. The research, published this week in Geophysical Research Letters, is the first assessment of how quickly floating ice is being lost today. According to Archimedes' principle, any floating object displaces its own weight of fluid. For example, an ice cube in a glass of water does not cause the glass to overflow as it melts. But because sea water is warmer and more salty...

2010-03-18 13:48:00

WASHINGTON, March 18 /PRNewswire-USNewswire/ -- NASA's Operation IceBridge mission, the largest airborne survey ever flown of Earth's polar ice, kicks off its second year of study when NASA aircraft arrive in Greenland March 22. (Logo: http://www.newscom.com/cgi-bin/prnh/20081007/38461LOGO) The IceBridge mission allows scientists to track changes in the extent and thickness of polar ice, which is important for understanding ice dynamics. IceBridge began in March 2009 as a means to fill...

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2010-03-18 14:21:04

NASA's Operation IceBridge mission, the largest airborne survey ever flown of Earth's polar ice, kicks off its second year of study when NASA aircraft arrive in Greenland March 22. The IceBridge mission allows scientists to track changes in the extent and thickness of polar ice, which is important for understanding ice dynamics. IceBridge began in March 2009 as a means to fill the gap in polar observations between the loss of NASA's Ice, Cloud and land Elevation Satellite, or ICESat, and the...

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2010-03-02 11:17:07

The melting of glaciers is well documented, but when looking at the rate at which they have been retreating, a team of international researchers steps back and says not so fast. Previous studies have largely overestimated mass loss from Alaskan glaciers over the past 40-plus years, according to Erik Schiefer, a Northern Arizona University geographer who coauthored a paper in the February issue of Nature Geoscience that recalculates glacier melt in Alaska. The research team, led by...

2010-02-27 07:56:41

As ESA's Mission Scientist for CryoSat, Mark Drinkwater's role in supporting the preparation of the mission has been to ensure that the satellite and data processing systems are compatible with achieving the mission's objectives of deriving accurate measurements of ice-thickness change. Mark Drinkwater, a British national, trained as a geophysicist and performed early pioneering research in the use of altimeter measurements over polar ice. He currently heads the Mission Science Division at...

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2010-02-16 06:05:00

According to studies released on Sunday, winds and currents that drive warmer water into fjords, where it carves out the base of coastal glaciers, are significantly eroding Greenland's ice sheet. The icy mass holds enough water to boost global sea levels 23 feet, which could potentially drown low-lying coastal cities and deltas across the globe. The ocean watermark is currently rising about 0.12 inches a year, which compares with 0.07 inches annually in the early 1960s. However,...

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2010-01-14 14:15:00

In what might seem rather appropriate weather conditions, the CryoSat-2 Earth Explorer satellite has completed its journey to the Baikonur launch site in Kazakhstan, where it will be prepared for launch on February 25. The satellite and support equipment left the "ËœIABG' test center in Ottobrunn, Germany, by lorry on January 12. The CryoSat mission is dedicated to precise monitoring of the changes in the thickness of marine ice floating in the polar oceans and variations in the...


Word of the Day
omphalos
  • The navel or umbilicus.
  • In Greek archaeology: A central boss, as on a shield, a bowl, etc.
  • A sacred stone in the temple of Apollo at Delphi, believed by the Greeks to mark the 'navel' or exact center-point of the earth.
'Omphalos' comes from the ancient Greek.
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