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A warm-water time bomb could spell disaster for Arctic sea ice

点击量:   时间:2019-03-04 13:04:01

THE Arctic is in hot water, literally. Heat has been accumulating rapidly in a salty layer 50 metres down in a large part of the Arctic Ocean. Currently, it is capped by a less-dense layer of fresh water, but the fear is that winds could make this lid fall apart. If the two layers mix, this could melt all the seasonal sea ice above. Mary-Louise Timmermans at Yale University and her colleagues discovered the heat time bomb after analysing data on ice cover and sea temperature,