Irish Journal of European Law: Call for Papers Wed Feb 25, 2015 09:40 | Aoife O'Donoghue
Call for Papers and Posters: Post-graduate Symposium on Occupation, Transitional Justice and Gender Mon Feb 23, 2015 11:15 | Liam Thornton
Political Policing of Protests? Fri Feb 20, 2015 13:52 | Vicky Conway
UCD Human Rights Network Screening: The Torture Files Tue Feb 17, 2015 16:06 | Liam Thornton
Social and Economic Rights Panel Discussion at DCU Tue Feb 17, 2015 11:37 | Yvonne Daly
Human Rights in Ireland >>
For lefties too stubborn to quit
Any teachers in the house? 20:09 Mon Mar 02, 2015 | WorldbyStorm
Reclaim the Bridges in Dublin for International Women?s Day 17:34 Mon Mar 02, 2015 | WorldbyStorm
Archon on ?breakfasting with such a distinguished politico!? 13:23 Mon Mar 02, 2015 | WorldbyStorm
?Sean O?Casey lived here ? A community remembers? 11:39 Mon Mar 02, 2015 | WorldbyStorm
How bad could it be for the Labour Party? 10:14 Mon Mar 02, 2015 | WorldbyStorm
Cedar Lounge >>
Life should be full of strangeness, like a rich painting
THE WRATH OF KANE: BANKING CRISES AND POLITICAL POWER 09:32 Fri Jan 30, 2015
ALWAYS THE ARTISTS: WEEK THREE OF THE BANK INQUIRY 23:11 Thu Jan 22, 2015
FIANNA FÁIL AND THE BANK INQUIRY : SOME INITIAL OBSERVATIONS 21:04 Mon Jan 12, 2015
PETER NYBERG BANK INQUIRY EVIDENCE, 17 DECEMBER 2014 18:05 Sun Dec 28, 2014
For Some Vicious Mole of Nature: Making Sense of The Irish Bank Crisis 21:07 Fri Dec 26, 2014
Dublin Opinion >>
Farewell from NWL Sun May 19, 2013 14:00 | namawinelake
Happy 70th Birthday, Michael Sun May 19, 2013 14:00 | namawinelake
Of the Week? Sat May 18, 2013 00:02 | namawinelake
Noonan denies IBRC legal fees loan approval to Paddy McKillen was in breach of E... Fri May 17, 2013 14:23 | namawinelake
Gayle Killilea Dunne asks to be added as notice party in Sean Dunne?s bankruptcy Fri May 17, 2013 12:30 | namawinelake
NAMA Wine Lake >>
NASA Mission Takes Stock of Earth's Melting Land Ice
Friday February 24, 2012 17:35 by Steve Cole - NASA
In the first comprehensive satellite study of its kind, a University of Colorado at Boulder-led team used NASA data to calculate how much Earth's melting land ice is adding to global sea level rise.
Using satellite measurements from the NASA/German Aerospace Center Gravity Recovery and Climate Experiment (GRACE), the researchers measured ice loss in all of Earth's land ice between 2003 and 2010, with particular emphasis on glaciers and ice caps outside of Greenland and Antarctica.
The total global ice mass lost from Greenland, Antarctica and Earth's glaciers and ice caps during the study period was about 4.3 trillion tons (1,000 cubic miles), adding about 0.5 inches (12 millimeters) to global sea level. That's enough ice to cover the United States 1.5 feet (0.5 meters) deep.
Changes in ice thickness (in centimeters per year) during 2003-2010 as measured by NASA's Gravity Recovery and Climate Experiment (GRACE) satellites, averaged over each of the world's ice caps and glacier systems outside of Greenland and Antarctica.
"Earth is losing a huge amount of ice to the ocean annually, and these new results will help us answer important questions in terms of both sea rise and how the planet's cold regions are responding to global change," said University of Colorado Boulder physics professor John Wahr, who helped lead the study. "The strength of GRACE is it sees all the mass in the system, even though its resolution is not high enough to allow us to determine separate contributions from each individual glacier."
About a quarter of the average annual ice loss came from glaciers and ice caps outside of Greenland and Antarctica (roughly 148 billion tons, or 39 cubic miles). Ice loss from Greenland and Antarctica and their peripheral ice caps and glaciers averaged 385 billion tons (100 cubic miles) a year. Results of the study will be published online Feb. 8 in the journal Nature.
Traditional estimates of Earth's ice caps and glaciers have been made using ground measurements from relatively few glaciers to infer what all the world's unmonitored glaciers were doing. Only a few hundred of the roughly 200,000 glaciers worldwide have been monitored for longer than a decade.
One unexpected study result from GRACE was that the estimated ice loss from high Asian mountain ranges like the Himalaya, the Pamir and the Tien Shan was only about 4 billion tons of ice annually. Some previous ground-based estimates of ice loss in these high Asian mountains have ranged up to 50 billion tons annually.
"The GRACE results in this region really were a surprise," said Wahr, who is also a fellow at the University of Colorado-headquartered Cooperative Institute for Research in Environmental Sciences. "One possible explanation is that previous estimates were based on measurements taken primarily from some of the lower, more accessible glaciers in Asia and extrapolated to infer the behavior of higher glaciers. But unlike the lower glaciers, most of the high glaciers are located in very cold environments and require greater amounts of atmospheric warming before local temperatures rise enough to cause significant melting. This makes it difficult to use low-elevation, ground-based measurements to estimate results from the entire system."
"This study finds that the world's small glaciers and ice caps in places like Alaska, South America and the Himalayas contribute about 0.02 inches per year to sea level rise," said Tom Wagner, cryosphere program scientist at NASA Headquarters in Washington. "While this is lower than previous estimates, it confirms that ice is being lost from around the globe, with just a few areas in precarious balance. The results sharpen our view of land-ice melting, which poses the biggest, most threatening factor in future sea level rise."
The twin GRACE satellites track changes in Earth's gravity field by noting minute changes in gravitational pull caused by regional variations in Earth's mass, which for periods of months to years is typically because of movements of water on Earth's surface. It does this by measuring changes in the distance between its two identical spacecraft to one-hundredth the width of a human hair.
The GRACE spacecraft, developed by NASA's Jet Propulsion Laboratory, Pasadena, Calif., and launched in 2002, are in the same orbit approximately 137 miles (220 kilometers) apart. The California Institute of Technology manages JPL for NASA.
For more on GRACE, visit: http://www.csr.utexas.edu/grace and http://grace.jpl.nasa.gov .
For more information about NASA and agency programs, visit: http://www.nasa.gov .
JPL is managed for NASA by the California Institute of Technology in Pasadena.
Additional media contact: Jim Scott, CU-Boulder, 303-492-3114, firstname.lastname@example.org .
Alan Buis 818-354-0474
Jet Propulsion Laboratory, Pasadena, Calif.
Steve Cole 202-358-0918
NASA Headquarters, Washington