Thursday, August 4, 2011

Himalaya glaciers shrinking on global warming,some may disappear

Three Himalaya glaciers have been shrinking over the last 40 years due to global warming and two of them, located in humid regions and on lower altitudes in central and east Nepal, may disappear in time to come, researchers in Japan said on Tuesday.

Using global positioning system and simulation models, they found that the shrinkage of two of the glaciers -- Yala in central and AX010 in eastern Nepal -- had accelerated in the past 10 years compared with the 1970s and 1980s.

Yala's mass shrank by 0.8 (2.6 feet) and AX010 by 0.81 metres respectively per year in the 2000s, up from 0.68 and 0.72 metres per year between 1970 and 1990, said Koji Fujita at the Graduate School of Environmental Studies in Nagoya University in Japan.

"For Yala and AX, these regions showed significant warming ... that's why the rate of shrinking was accelerated," Fujita told Reuters by telephone.

"Yala and AX will disappear but we are not sure when. To know when, we have to calculate using another simulation (model) and take into account the glacial flow," Fujita said, but added that his team did not have the data to do so at the moment. (more)