Climate Change Eating into Large Chunks of Greenland's Glaciers

In a new study, scientists have found out that water warmed by climate change is taking giant bites out of the underbellies of Greenland's glaciers, with 75 per cent of the ice lost

With 75 per cent of the ice lost by the glaciers being melted by ocean warmth, yet another study is trying to emphasize the dramatic change global warming is causing in our glaciers. Climate change, it declares, is taking giant bites out of the underbellies of Greenland's glaciers, .

"There's an entrenched view in the public community that glaciers only lose ice when icebergs calve off," Eric Rignot at the University of California, Irvine, told New Scientist.

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"Our study shows that what's happening beneath the water is just as important," he added.

In the summer of 2008, Rignot's team measured salinity, temperature and current speeds near four calving fronts in three fjords in western Greenland.

They calculated melting rates from this data.

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The underwater faces of the different glaciers retreated by between 0.7 and 3.9 metres each day, representing 20 times more ice than melts off the top of the glacier.

"This creates ice overhangs that crumble into the sea," said Paul Holland at the British Antarctic Society.

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"Warming water may also be unlocking ice from the seabed, removing the buttresses that stop inland ice sliding out to sea," said Rignot.

This is one way that warming oceans could be helping to shift Greenland's ice off the land and out to sea.

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Water flowing beneath the ice plays a much more complex role in the melting of Greenland's glaciers than they previously imagined, scientists have revealed.

According to glaciologist Eric Steig at the University of Washington in Seattle, the importance of bottom-melting by warm ocean water was well-known in Antarctic glaciers.

"But this is the first study to strongly indicate that it is occurring in Greenland too," he said.

Source-ANI