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Pastimes : Severe weather events, climate change and economics
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From: Sam12/11/2018 2:34:35 PM
   of 566
 
East Antarctica glacial stronghold melting as seas warm
Nasa detects ice retreat probably linked to ocean changes in region once thought stable
Damian Carrington Environment editor
Tue 11 Dec 2018 10.42 EST Last modified on Tue 11 Dec 2018 11.58 EST


The Totten glacier, East Antarctica. Photograph: Esmee van Wijk/Australian Antarctic Division


A group of glaciers spanning an eighth of the East Antarctica coastline are being melted by the warming seas, scientists have discovered.

This Antarctic region stores a vast amount of ice, which, if lost, would in the long-term raise global sea level by tens of metres and drown coastal settlements around the world.

Freezing temperatures meant the East Antarctica region was until recently considered largely stable but the research indicates that the area is being affected by climate change.

The vast Totten glacier was known to be retreating but the new analysis shows that nearby glaciers in the East Antarctica area are also losing ice.

To the east of Totten, in Vincennes Bay, the height of the glaciers has fallen by about three metres in total since 2008, before which no loss had been recorded.

To the west of Totten, in Wilkes Land, the rate of height loss has doubled since 2009, with glaciers losing height by about two and a half metres to date.

The data comes from detailed maps of ice movement speed and height created by Nasa from satellite information.

continues at theguardian.com
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