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A polar, sub-polar, or Arctic cyclone (also known as a polar vortex)[46] is a vast area of low pressure that strengthens in the winter and weakens in the summer.
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Cyclone - Wikipedia
hurricane Pacific typhoon North Indian Ocean cyclone South Pacific cyclone Australian region cyclone South-West Indian Ocean cyclone Upper level types Polar cyclone Main article: Polar cyclone <span>A polar, sub-polar, or Arctic cyclone (also known as a polar vortex)[46] is a vast area of low pressure that strengthens in the winter and weakens in the summer.[47] A polar cyclone is a low-pressure weather system, usually spanning 1,000 kilometres (620 mi) to 2,000 kilometres (1,200 mi), in which the air circulates in a counterclockwise direct


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