Arctic cyclones are vast areas of low pressure. They should not be confused with what are commonly referred to as polar lows that behave similarly to hurricanes.
An arctic cyclone is a low pressure weather system usually spanning 1000-2000 kilometers in which the air is circulating in a counterclockwise fashion (in the northern hemisphere). The reason for the rotation is the same as tropical cyclones, the Greenland and the Canadian arctic.
Arctic cyclones can occur at any time during the year. However, summer cyclones tend to be weaker than winter cyclones.
A polar cyclone is a low pressure weather system usually spanning 1000–2000 kilometers in which the air is circulating in a counterclockwise fashion (in the northern hemisphere).
The reason for the rotation is the same as tropical cyclones, the coriolis effect.
Cyclone activity is most prevalent in the Eurasian Arctic with approximately 15 cyclones per winter.
Cyclones are responsible for a wide variety of different meteorological phenomena such as tropical cyclones and tornadoes.
Near the center of the cyclone the pressure gradient force, from high- to low-pressure regions, and the Coriolis force must be in an approximate balance (or else the cyclone would collapse in on itself under the pressure gradient).
On April 27, 1999, a rare cyclone 1,100 miles in diameter was detected by the Hubble Space Telescope in the northern polar region of Mars.
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