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单词 polar vortex
释义
polar vortex

Geography
  • A rotating polar high pressure system, formed as a distinct column of cold air in the middle to lower stratosphere, developed during the long polar night; wind speeds may reach 100 metres s−1. Upper troposphere air is sucked into the vortex, then sinks to cause polar highs. See Chshyolkova et al. (2007) Angeo 25 on the Arctic Polar vortex.


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