纪录片《全球怪象》 第31期：北极圈变小

For example, over Europe.

譬如 整个欧洲

It is, indeed, true that when you reduce the ice

确确实实 当冰川体积减小时

that lets lots of heat out of the ocean, so in the Arctic,

海洋中会释放很多能量 因此在北极

you see several degrees of warming

在大气层底部

in the lower part of the atmosphere.

温度确实上升了几度

And there's little doubt

毫无疑问

that it's been getting warmer in the Arctic.

北极确实正在变暖

In the last ten years,

过去的十年里

the sea ice has reached record low levels.

海冰的总体积已经下降至极低点

According to the Met Office's

从英国气象局所建立的

highly sophisticated computer models,

极为复杂的计算机模型中可以看到

a hotter Arctic doesn't equal a warmer Britain.

北极变暖并不意味着英国也会变暖

That warming that's happening

北极变暖的同时

over the Arctic is not seen over Europe.

欧洲并没有随着一起变暖

The reason for that is because

导致这个现象的原因是

the circulation changes, the wind changes.

大气环流的变化 风的变化

It turns out when you remove the Arctic ice,

当冰川体积减小时

and the winds become more easterly.

风向会变的更偏东

So the winds start to circulate from east to west around the Arctic

因此北极的风向转为围绕着北极由东向西

and south of the Arctic,

并且开始影响北极以南

and that dominates the response over Europe.

这个风向则是决定欧洲气温变化的原因

So instead of warming in the winter

因此 在北极海冰减小的同时

over Europe when the ice is depleted¹

欧洲的冬季并不会变的更温暖

we get cooling because we're

欧洲会变得更冷

dragging the air from Siberia over northern Europe.

因为西伯利亚的冷风被气流带到了北欧

1 depleted   

adj. 枯竭的, 废弃的 动词deplete的过去式和过去分词

参考例句：

• Food supplies were severely depleted. 食物供应已严重不足。
• Both teams were severely depleted by injuries. 两个队都因队员受伤而实力大减。