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Polar vortex
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A polar vortex, more formally a circumpolar vortex, is a large region of cold, rotating air; polar vortices encircle both of Earth's polar regions. Polar vortices also exist on other rotating, low-obl
A strong tropospheric polar vortex configuration in November 2013
A strong tropospheric polar vortex configuration in November 2013
A more typical weak tropospheric polar vortex on January 5, 2014
A more typical weak tropospheric polar vortex on January 5, 2014
Polar vortex and weather impacts due to stratospheric warming[clarification needed]
Polar vortex and weather impacts due to stratospheric warming[clarification needed]
Low pressure area over Quebec, Maine, and New Brunswick, part of the northern polar vortex weakening, on the record-setting cold morning of January 21
Low pressure area over Quebec, Maine, and New Brunswick, part of the northern polar vortex weakening, on the record-setting cold morning of January 21, 1985
Westerlies
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The westerlies, anti-trades, or prevailing westerlies, are prevailing winds from the west toward the east in the middle latitudes between 30 and 60 degrees latitude. They originate from the high-press
Polar vortex
…single low-pressure zone that is found near the edge of the Ross ice shelf, near 160 west longitude. When the polar vortex is strong, the mid-latitude Westerlies (winds at the surface level between 30° and 60° latitude from the west) increase in strength and are persistent. When the polar vortex is weak…
The general atmospheric circulation. Trade winds (red), westerlies (white) and the South Pacific anticyclone (blue)
The general atmospheric circulation. Trade winds (red), westerlies (white) and the South Pacific anticyclone (blue)