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Illustration of two situations for the polar jet stream: Text: The polar vortex is a large area of low pressure and cold air over Earth's North and South Poles. When the jet stream weakens, it becomes wavier, allowing that cold air to dip southward in places while warmer air pushes northward elsewhere. A large pressure difference helps keep a strong jet stream on a straighter path, which keeps the cold air over the Arctic When the jet stream weakens, it becomes wobblier, allowing cold Arctic air to move southward

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    Dan Neuman (dan613@mstdn.ca)'s status on Wednesday, 17-Jan-2024 23:09:19 JST Dan Neuman Dan Neuman
    in reply to

    @gwynnion Here is an illustration of how climate change increases the likelihood of polar vortexes. Many places aren't prepared for the cold weather, and it can play havoc wth fruit trees and winter crops. The warm periods entice growth, followed by a cold snap that kills off buds and shoots.

    In conversation Wednesday, 17-Jan-2024 23:09:19 JST from mstdn.ca permalink
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