Joined up thinking for the Irish Left
Time to Get Real Fri Apr 29, 2016 13:45 | Michael Taft
Turning Failure Into Hope Fri Apr 29, 2016 13:40 | Michael Taft
Ask the Right Questions Fri Apr 22, 2016 17:52 | Michael Taft
Spring Reading Selection Wed Apr 20, 2016 15:07 | Seán Sheehan
Victory to all Retail Workers Tue Apr 19, 2016 14:05 | Michael Taft
Irish Left Review >>
Wailings about Left Unity Sat Feb 13, 2016 01:13 | James O'Brien
The Bern Manifesto: Why I am Voting for Bernie Sanders Wed Jan 27, 2016 23:59 | Jerome Nikolai Warren
Kautsky â€“ The crisis of capitalism and the shortening of working time Mon Nov 09, 2015 22:34 | James O'Brien
How to do better things with words Fri Oct 23, 2015 07:38 | modulus
Syriza and Israel: Syrizaâ€™s response Thu Aug 20, 2015 18:10 | yeksmesh
Spirit of Contradiction >>
Interested in maladministration. Estd. 2005
Terry Prone: Water protesters are dumb
Conor Pope: Genuinely clueless Anthony
Conor Pope: Supporting Irish Water Anthony
Colette Browne chases Rabbitte back down his burrow Anthony
Irish media: Looking after their own Anthony
Public Inquiry >>
A bird's eye view of the vineyard
Turkey is behind the (some of the) Crimean Tatars Tue May 03, 2016 16:15 | The Saker
by Franz Krummbein Turco-Ukrainian relations are based fundamentally on policy toward the Crimean Tatars. On that basis, Kiev and Ankara have cooperated on joint projects in the areas of defense
International Military Review ? Syria, May 2, 2016 Mon May 02, 2016 23:33 | The Saker
How Syrian Kurds dropped Marx and adopted communalism Mon May 02, 2016 17:58 | The Saker
by Claudio Gallo Debbie is not only the daughter of Murray Bookchin, the theorist of Communalism. She is a journalist and writer: in 2004, she wrote, together with Jim Schumacher,
The Calm Before the Coming Global Storm Mon May 02, 2016 17:13 | The Saker
by Pepe Escobar for Sputnik News Major turbulence seems to be the name of the game in 2016. Yet the current turbulence may be interpreted as the calm before the
Germany SITREP May 2nd, 2016 by C. Mon May 02, 2016 17:13 | Scott
Satire in Germany attacking Erdogan and Turkish politics Lately there has been a lot of controversy in Germany over the issue of political satire criticising Erdogan and his regime in
The Saker >>
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, email@example.com .
Alan Buis 818-354-0474
Jet Propulsion Laboratory, Pasadena, Calif.
Steve Cole 202-358-0918
NASA Headquarters, Washington