Global warming is crimping the ribbon of air that controls weather systems in the Northern Hemisphere, intensifying extreme weather around the world. - NBCNewsMACH
Zakaria Abdelkafi / AFP - Getty ImagesAn oppressive heat wave baked Western Europe this week, setting record high temperatures in France, Germany, Poland and the Czech Republic. In India, a severe drought has choked water supplies in the city of Chennai, exposing its 9 million residents to a major shortage. And after the United States’ wettest 12-month stretch on record, towns across the Midwest and the Great Plains are reeling from devastating floods.
The jet stream is powered by temperature differences between the cooler polar region to the north and warmer air masses to the south. As it circles the planet, this river of air can become rippled in places.
Seasonal variations are normal, but since the early 2000s, as the planet has warmed, the jet stream has been behaving strangely. Jet stream winds, which naturally undulate, have become even more gnarled, and the big wavy patterns sometimes slow to a crawl, or even completely stall.A sluggish jet stream is cause for concern.
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