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Antarctic glacier thinning at alarming rate
August 14, 2009The thinning of a gigantic glacier in Antarctica is accelerating, scientists warned today.
The Pine Island Glacier in West Antarctica, which is around twice the size of Scotland, is losing ice four times as fast as it was a decade years ago.
The Pine Island Glacier is located within the most inaccessible area of Antarctica - over 1000 km from the nearest research base - and was for many years overlooked. Now, scientists have been able to track the glacier's development using continuous satellite measurements over the past 15years.
"Accelerated thinning of the Pine Island Glacier represents perhaps the greatest imbalance in the cryosphere today, and yet we would not have known about it if it weren't for a succession of satellite instruments," says Professor Andrew Shepherd, a co-author of the research from the School of Earth and Environment at the University of Leeds.
"Being able to assemble a continuous record of measurements over the past 15 years has provided us with the remarkable ability to identify both subtle and dramatic changes in ice that were previously hidden," he adds.
Scientists believe that the retreat of glaciers in this sector of Antarctica is caused by warming of the surrounding oceans, though it is too early to link such a trend to global warming.
The 5,400 km squared region of the Pine Island Glacier affected today is big enough to impact the rate at which sea level rise around the world.
"Because the Pine Island Glacier contains enough ice to almost double the IPCC's best estimate of 21st century sea level rise, the manner in which the glacier will respond to the accelerated thinning is a matter of great concern " says Professor Shepherd.
University of Leeds
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Antarctic ice loss speeds up, nearly matches Greenland loss
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Scientists Detect Thinning West Antarctic Ice.
A major glacial formation in Antarctica is shrinking, a report in SCIENCE will reveal today. But questions still remain about the speed at which ice sheet thinning is taking place. Scientists at University College London (UCL) and the British Antarctic Survey have used satellite data to show that the interior of the West Antarctic Ice Sheet (WAIS) is thinning inland. Since 1992, 31 cubic kilometres of ice has been lost from its interior. The loss can be pinpointed to the fast flowing Pine Island Glacier - the largest glacier in West Antarctica - which transports ice from the deep interior of the ice sheet to the ocean. Occupying what many visitors to Antarctic consider to be one of its remot
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