Cold snap caused by climate change-weakened jet stream, scientists suggest

Posted by Mike Confino, November 20, 2014

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Arctic conditions in eastern United States this week may have been the result of climate change-induced stressors on the jet stream that regulates weather over the northern hemisphere, according to meteorologists.

Residents in a large swath of the country’s east have been met with sub-freezing temperatures over the past week. And overnight Wednesday, more than 5 feet of snow descended on parts of western New York state. Media have referred to the strange weather pattern as the Polar Vortex and the Arctic Blast.

Ironically, though, it was warmer-than-usual temperatures that likely sent the cold weather southwards. Climate change-induced ocean warming in the Pacific turned Typhoon Nuri into a “supertyphoon” that punched the jet stream off its course, bringing the North Pole’s weather down over the eastern U.S., according to experts.

via Cold snap caused by climate change-weakened jet stream, scientists suggest | Al Jazeera America.

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