This air flowacts like a fence to keep Arctic air confined.

这股气流就像一个屏障，把北极空气给禁锢了起来。

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Instead, frigid Arctic air has descended upon much of northern Europe.

代替的是，寒冷的北极冷空气长驱直入进入欧洲北部上空。

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The reason is that Arctic air is warming twice as fast as the atmosphere as a whole.

原因在于，北极大气的变暖速度两倍于整个地球大气层。

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But Arctic air has damaged some Florida oranges and strawberries in recent days, and killed fish at tropical fish farms.

VOA: special.2010.01.12

Skeptics point out that global warming is expected to warm Arctic air masses more than Gulf of Mexico air masses, which will therefore diminish the contrast between the two air masses and reduce the strength and likelihood of tornadoes.

FORBES: Alarmists Offer A Perfect Global Warming Challenge

When the differential is in positive territory (red) it means higher, stronger air over the North Atlantic pushes up on the low-pressure air over the Arctic circle.

FORBES: Snowpocalypse: Explained!

Air temperatures in the Arctic are rising about twice as fast as in the rest of the world.

ECONOMIST: Getting warmer