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NASA, researchers: Antarctic ice loss at least 10 gigatons a year for last decade

By | July 25, 2011, 9:48 AM PDT

Researchers with an assist from NASA have mapped how much glacial ice is moving to sea after a collapse of an Antarctic ice shelf.

NASA said the aim of the project is to detail ice losses and then predict sea level impacts as Antarctic ice breaks away.

Researchers from the University of Maryland, Baltimore County (UMBC), the Laboratoire d’Etudes en Geophysique et Oceanographie Spatiales, Centre National de la Recherche Scientifique at the University of Toulouse, France, and the University of Colorado’s National Snow and Ice Data Center, Boulder, Colo., were involved with the project.

The group combined NASA’s satellite data with information from CNES, the French space agency, and mapped it against previous ice shelf losses in 1995, 2001, 2002 and 2009. The upshot: Antarctic ice loss was 11.2 gigatons a year from 2001 to 2006 and 10.2 gigatons from 2006 to 2010.

Here’s a look at the Larsen B ice shelf collapse from 2002 and there’s an animation at NASA.

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Larry Dignan

About Larry Dignan

Larry Dignan is editor-in-chief of SmartPlanet.

Larry Dignan

Larry Dignan

Editor-in-Chief

Larry Dignan is editor-in-chief of SmartPlanet and ZDNet. He is also editorial director of TechRepublic. Previously, he was an editor at eWeek, Baseline and CNET News. He has written for WallStreetWeek.com, Inter@ctive Week, New York Times and Financial Planning. He holds degrees from the Columbia University Graduate School of Journalism and the University of Delaware. He is based in New York but resides in Pennsylvania.

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Larry Dignan

Larry Dignan
Larry Dignan does not hold any investments in the companies he covers.
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+1 Vote
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10 Gt is only for the Larson B area glaciers
From the original article:

The authors' analysis shows ice loss in the study area of at least 11.2 gigatons (11.2 billion tons) per year from 2001 to 2006. (Emphasis added).

For all of Antarctica the loss is on a scale of more than 100 Gt per year and the rate of loss is accelerating.
Posted by riverat1
Updated - 26th Jul
0 Votes
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Overall loss of Antarctic glacial ice is much greater in recent years
Excellent point regarding the overall loss of ice volume. Greenhouse gases (from carbon based fossil fuels) accuumlate in the atmosphere and act to trap heat near the Earth's surface. The tendency for heat to be reflected back to the atmosphere by snow cover (as opposed to being absorbed by water or vegetation) creates an overall localized temperature increase at the Earth's North and South poles (greater than in temperate and tropical climates). This phenomenon explains the significant melting of these Antarctic glaciers and ice shelves in recent years.
Posted by jonesds1
Updated - 26th Jul
+3 Votes
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Where is the rest of the data?
This "comparative study" seems to imply a drop in ice melt but there is simply not enough data to say anything. He mentions1995 data but the writer fails to mention the rate for that or any other period so no meaningful comparisons or conclusions can be drawn. And given the enormous complexity of the dynamics of the globe one must remember that any additional input of energy into a complex system will not always provide a linear increase in temperatures, or drops. Until a final scenario is understood the temperatures in any given location or as a whole will vary up or down over time. So the nay sayers can not say that a drop shows there is no global warning as there are only two data points and complex dynamics will cause difficult to predict changes until a critical point of energy absorption has been reached at which time it may well be too late. Also as in any complex system local variations will act differently but will begin to become more and more unstable, as seen in many weather patterns now. I wonder about what message this writer is trying to give with such narrow data and only two data points. Hmmmm?!?
Posted by bsit@...
Updated - 25th Jul
0 Votes
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Scanty information
Agreed @bsit, if I may suggest that Larry Dignan give us more links to the real data? This condensed blurb doesn't satisfy our curiosity.
Posted by Shadeburst
26th Jul
0 Votes
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Ice loss
Just more alarming claims. Ocean warming for what ever reason will do more to melt ice. Many under water volcano's around. More snow at higher elevations will push more ice to the sea. It takes a 1000 years for the ocean waters to make a complete cycle. Are 10 year looks worth anything?
Posted by lwilhelmsen
26th Jul
0 Votes
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Non sequiturs
Atmospheric warming causes ocean warming - there hasn't been any big increase in underwater vulcanism. More snow does not explain the huge net loss of ice in Antarctica. The length of the water cycle has no relevance at all.
Posted by Greenknight_z
27th Jul
0 Votes
+ -
thanks for sharing
Great!!! thanks for sharing this information to us!
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Posted by yarinsiz
Updated - 26th Aug
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