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Arctic ice

The Arctic has lost more sea ice this year than at any time since satellite records began in 1979, Nasa says.

"The summer ice volume is now only 30% of what it was in the 1980s”
Prof Peter Wadhams Cambridge University

Professor Peter Wadhams, from Cambridge University, told BBC News: "A number of scientists who have actually been working with sea ice measurement had predicted some years ago that the retreat would accelerate and that the summer Arctic would become ice-free by 2015 or 2016.

But Prof Wadhams said the prediction was now coming true, and the ice had become so thin that it would inevitably disappear.