Current global warming from greenhouse gases generated by human activities could warm the arctic to levels above the melting point of ice, the study said.

该研究称，人类活动产生的温室气体所造成的当前全球变暖可能使北极暖化程度高于冰的融点。

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Reading about the Jeannette artifacts, Nansen wondered if the strong east-to-west current over the Arctic could be ridden to the North Pole—or at least close. And so an idea was hatched.

看过这些物件后，南森想知道，究竟他能不能乘着北冰洋里这股强大的东西方向洋流去到北极或者起码是接近北极的地方，于是一个想法诞生了。

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Another is the Labrador Current - cold water coming down from the Arctic.

另外一条是拉布拉多海流——这是来自北冰洋的冷水流。

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The strait is the exit route from the Arctic Ocean, a current carrying the floes south into the Atlantic.

BBC: The 'big melt' at the roof of the world

This is broadly similar to the 1979-2000 average of 7.04 million sq km observed by modern satellites, and the number used to judge current behaviour in the Arctic.

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The current warming being experienced in the Arctic means the conditions needed to rebuild the shelves simply does not exist.

BBC: Canadian Arctic sheds ice chunk