Harsh winter weather in eastern US could be due to warmer Arctic

Enlarge / Temperatures at the start of 2018—a familiar pattern as of late. (credit: NASA Earth Observatory)

Without some historical context, it’s easy to over-interpret an unusual weather event, especially when it’s fresh in your mind. At this time of year in the US, that means cold snaps or unseasonably warm weather—and the storms that accompany them. Are they tied in with our changing climate?

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There’s a legitimately controversial proposal that they are. The idea that warming in the Arctic (and shrinking sea ice coverage) has been making northern mid-latitude winters “weirder” has drawn a lot of attention in recent years. But does it explain the weather you complained about last week?

The idea suggests that the weirdness is driven by the fact that the Arctic is warming faster than any other region, which slightly decreases the temperature difference from equator to pole. A number of researchers think this can cause the jet stream (which separates frigid polar air from warmer midlatitude air) to get more wiggly—allowing cold air to spill southward more frequently. On the opposite side of those wiggles, warm air will get pulled north to normally frigid regions.

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Post Author: martin

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Martin is an enthusiastic programmer, a webdeveloper and a young entrepreneur. He is intereted into computers for a long time. In the age of 10 he has programmed his first website and since then he has been working on web technologies until now. He is the Founder and Editor-in-Chief of BriefNews.eu and PCHealthBoost.info Online Magazines. His colleagues appreciate him as a passionate workhorse, a fan of new technologies, an eternal optimist and a dreamer, but especially the soul of the team for whom he can do anything in the world.

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