Big decline in depth of Arctic winter sea ice

The thickness of sea ice in the Arctic dramatically declined last winter for the first time since records began in the early 1990s. The research by British scientists shows a significant loss in the thickness of the northern ice cap after the record loss of ice in the summer of 2007, although the weather was not abnormally warm.The findings, published in the journal Geophysical Research Letters, raise the possibility that the loss of the Arctic sea ice could accelerate, because as the ice recedes the water temperature rises. This summer the sea ice recorded its second-lowest extent after the record low of 2007, again despite relatively cool air temperatures.However, Katharine Giles of the Centre for Polar Observation and Modelling at University College London, who led the study, said it was too soon to say whether the downward trend would continue and lead to summer sea ice disappearing even faster than...

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