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A circumpolar vortex, or simply polar vortex, is a large region of cold, rotating air; ... and the Coriolis effect causes the vortex to spin up. The stratospheric ...
Major SSWs occur when the winter polar stratospheric westerlies reverse to easterlies. In minor warmings, the polar temperature gradient reverses but the circulation does not, and in final warmings, the vortex breaks down and remains easterly until the following boreal autumn". [3]
Winter is coming and with it, plenty of phrases around cold weather phenomena like lake effect snow and wind chill. Among winter things to watch is the polar vortex, which portends bitterly cold ...
The polar vortex is a gigantic, circular area of cold air high up in the atmosphere that typically spins over the North Pole (as its name suggests).
The "polar vortex" that plunged Canada and the U.S. into historical cold last winter is said by researchers to have occurred because melting polar ice changes weather patterns, according to a ...
Beginning on January 2, 2014, sudden stratospheric warming (SSW) [dubious – discuss] led to the breakdown of the semi-permanent feature across the Arctic known as the polar vortex. Without an active upper-level vortex to keep frigid air bottled up across the Arctic, the cold air mass was forced southward as upper-level warming displaced the ...
As ominous as the term polar vortex sounds, meteorologists say the phenomenon is not new, nor despite its sound does it refer to a cyclone of cold or a freakishly dangerous storm. "The term 'polar ...
The cold was caused by a southern migration of the polar vortex, likely caused by a sudden stratospheric warming event that occurred the prior month. Temperatures fell as much as 25–50 °F (14–28 °C) below average as far south as the Gulf Coast.