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Wednesday, April 29, 2009

Global Warming: NYC-sized ice shelf collapses in Antarctica

Tromsoe (Norway): An area of an Antarctic ice shelf almost the size of New York City has broken into icebergs this month after the collapse of an ice bridge widely blamed on global warming, a scientist said.
    "The northern ice front of the Wilkins Ice Shelf has become unstable and the first icebergs have been released," Angelika Humbert, glaciologist at the University of Muenster in Germany, said of European Space Agency satellite images of the shelf, said on Tuesday.
    Humbert said about 700 sq km of ice — bigger than Singapore or Bahrain and almost the size of New York City — has broken off the Wilkins this month and shattered into a mass of icebergs.
    She said 370 sq kms of ice had cracked up in recent days from the Shelf, the latest of about 10 shelves on the Antarctic Peninsula to retreat in a trend linked by the U.N. Climate Panel to global warming.

    The new icebergs added to 330 sq kms of ice that broke up earlier this month with the shat
tering of an ice bridge apparently pinning the Wilkins in place between Charcot island and the Antarctic Peninsula.
    Nine other shelves — ice floating on the sea and linked to the coast — have receded or collapsed around the Antarctic peninsula in the past 50 years, often abruptly like the Larsen A in 1995 or the Larsen B in 2002. The trend is widely blamed on climate change caused by heat-trapping gases from burning fossil fuels. REUTERS

WARMING DISASTER: (Top) A satellite image of the Wilkins Ice Shelf, taken on April 27, shows icebergs covering an area of 700 sqkm that have broken off this month. (Above) A file picture of the ice shelf

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