Global Warming Is Messing with the Jet Stream. That Means More Extreme Weather. | InsideClimate News
The jet stream is a powerful high-altitude wind that shapes and moves weather systems from west to east. Different branches of the jet stream undulate from the subtropics to the edge of the Arctic. In the past 15 years at least, the jet stream has been coiling up more, slithering farther north and south. When it gets stuck in the extreme pattern identified by the scientists, it leads to more deadly and costly weather extremes.
That extremely wavy pattern, called “quasi-resonant amplification,” was evident during the extreme summer of 2018, Mann said.