Joined up thinking for the Irish Left
New Books Worth Reading Mon Sep 19, 2016 23:25 | Seán Sheehan
13 Billion ? Lucky for some? Mon Sep 05, 2016 13:04 | Tony Phillips
Rebuilding Ireland: Long on Promise, Short on Detail Mon Aug 29, 2016 22:20 | Eoin O'Mahony
Brexit and Other Issues: Comments on the Current Situation Mon Aug 29, 2016 21:52 | Brendan Young
Bin Charges: From Private Circus to Public Service Tue Jun 21, 2016 12:38 | Michael Taft
Irish Left Review >>
Review: Do Religions Evolve? Mon Aug 14, 2017 19:54 | Dara McHugh
Fake News: The Epistemology of Media Wed Jun 07, 2017 11:52 | Gavin Mendel-Gleason
Officials and Provisionals Sat Apr 01, 2017 22:54 | James O'Brien
Interview with Cathal Goulding Mon Dec 26, 2016 17:11 | Cathal Goulding
Trump, Russia and the CIA Sat Dec 10, 2016 18:23 | Gavin Mendel-Gleason
Spirit of Contradiction >>
Interested in maladministration. Estd. 2005
No law for the powerful, strict enforcement for decent citizens
Garda corruption: the stripped down truth Anthony
Will Pat Hickey turn up for his trial? Anthony
Garda breath tests letter Anthony
Daniel McConnell: Happy to wear establishment blinkers Anthony
Public Inquiry >>
A bird's eye view of the vineyard
The Black Sea Development Navy Brief 2/18 February 2018 Sat Feb 17, 2018 22:57 | Scott
by LeDahu for the Saker Blog Unprecedented show of power projection by the US Navy with 2 Arleigh Burke class DDGs now deployed in the Black Sea. The USS
Lessons From History Fri Feb 16, 2018 23:26 | mod editor
This comment was chosen by moderator HS from the post “Syrian War Report ? February 13, 2018: Israel Deploys New Anti-Missile Systems Near Syria”. The moderator felt the comment was
Syrian War Report ? February 16, 2018: Turkish Forces Capture Large Area In Afrin Fri Feb 16, 2018 20:14 | Scott
https://southfront.org/syrian-war-rep... On February 15, the Turkish Armed Forces (TAF) and the Free Syrian Army (FSA) achieved a major breakthrough in their battle against Kurdish YPG/YPJ forces in the area of
Moveable Feast Cafe 2018/02/16 ? Open Thread Fri Feb 16, 2018 19:00 | Herb Swanson
2018/02/16 19:00:01 Welcome to the ‘Moveable Feast Cafe’. The ‘Moveable Feast’ is an open thread where readers can post wide ranging observations, articles, rants, off topic and have animate discussions
Escalation in Syria ? how far can the Russians be pushed? Fri Feb 16, 2018 15:12 | The Saker
[This analysis was written for the Unz Review] Events in Syria have recently clearly taken a turn for the worse and there is an increasing amount of evidence that the
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