The Arctic could be in summer ice-free as soon as 2030 rather than 2100.

可能在不久的2030年，而不是2100年，北极的夏季就会无冰。

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Because of climate change, the Arctic Ocean's summer ice cover is now half of what it was 50 years ago.

由于气候变化，北冰洋夏季的冰覆盖量现在仅是50年前的一半。

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This image shows part of a polar crater that still holds on to some summer ice, as well as beautiful sand dunes sculpted by the wind.

这张照片展示了某个极地陨坑，陨坑中还保存着一些夏季冰的痕迹，在风的作用下形成了一些美丽的沙丘。

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The findings predicted that most of the Arctic's summer ice could disappear in thirty years.

VOA: special.2009.05.05

Yet some sea ice in the Arctic melts each year during summer in the Northern Hemisphere.

VOA: special.2009.10.27

The newer ice,experts say, is less resistant to melting during the summer months.

VOA: special.2009.05.05

Satellite data show that arctic late-summer ice has been in decline for about 25 years.

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This makes it hard to say how fast the summer ice cover will continue to shrink.

ECONOMIST: Summer ice in the Arctic Ocean is vanishing rapidly

But it is also possible that one or other of them will win through, with a significant effect on this year's summer ice.

ECONOMIST: Britain��s cold snap is explained by the Arctic oscillation