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Ice shelf on brink of collapse to compound risk from rising sea levels

Disintegration of giant Antarctic barrier to cause glaciers to slip into the oceans

Dan Sung
Friday 15 May 2015 11:23 BST
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Ross Ice Shelf
Ross Ice Shelf (Getty)

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An Antarctic ice shelf half the size of Rhode Island will break off into the ocean within the next five years according to a NASA study.

Already cracked since 2002, Larsen B, situated closest to the tip of South America, is one of many such structures predicted to cause an acceleration in the rise of sea levels when it finally disintegrates in what’s expected to be 2020.

The shelf covers 625 square miles and is one of many frozen masses which overhang the continent around its edges, the largest of which is the size of France.

Once gone, the glaciers behind Larsen B, which themselves have already thinned by 20m in depth since the 2002 incident, will have nothing to stop them from slipping into the waters at an increased rate putting further pressure on global waters.

The findings, published in the Earth and Planetary Science Letters journal, used data gathered from air surveys and radar to study the 10,000-year-old rice shelf remnant.

NASA’s report comes as another stark warning of the dangers of climate change and the need to manage CO2 emissions to slow sea level rise and protect coastal regions. In 2000, a UN environmental panel predicted that the Maldives would be uninhabitable by the year 2100.

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