Ice loss in Antarctica increased by 75 percent in the last 10 years due to a speed-up in the flow of its glaciers and is now nearly as great as that observed in Greenland, according to a new, comprehensive study by UC Irvine and NASA scientists.
In a first-of-its-kind study, an international team led by Eric Rignot, professor of Earth system science at UCI and a scientist with NASA’s Jet Propulsion Laboratory, Pasadena, Calif., estimated changes in Antarctica’s ice mass between 1996 and 2006 and mapped patterns of ice loss on a glacier-by-glacier basis. They detected a sharp jump in Antarctica’s ice loss, from enough ice to raise global sea level by 0.3 millimeters (.01 inches) a year in 1996, to 0.5 millimeters (.02 inches) a year in 2006.
Rignot said the losses, which were primarily concentrated in West Antarctica’s Pine Island Bay sector and the northern tip of the Antarctic Peninsula, are caused by ongoing and past acceleration of glaciers into the sea. This is mostly a result of warmer ocean waters, which bathe the buttressing floating sections of glaciers, causing them to thin or collapse. “Changes in Antarctic glacier flow are having a significant, if not dominant, impact on the mass balance of the Antarctic ice sheet,” he said.
Results of the study are published in February’s issue of Nature Geoscience.
If confirmed, this is really bad news. Greenland is bad enough that its losing ice mass so much, but if Antarctica starts losing as much...oy. "Fortunately," this looks like its restricted to the Peninsula and West Antarctica. If it's happening all over the continent though...
Move away from the coasts, folks, move away...
PS Al Gore says climate change is far worse than anyone imagined. Garsh! Really?!?!