Polar cyclone

From Wikipedia, the free encyclopedia
Jump to: navigation, search

Polar cyclones (also known as Arctic Cyclones) are large areas of low pressure. They should not be confused with polar lows since people happen to use the same term for polar cyclones. Polar cyclones are usually 1,000 to 2,000 kilometers wide in which the air is moving in a spiral counterclockwise fashion in the northern hemisphere. The reason for the rotation is the same as tropical cyclones, the Coriolis effect. They also exist in places such as Greenland, the Eurasian Arctic area, and northern Canada, with about 15 cyclones per winter. Polar cyclones can form in any time of the year, although summer polar cyclones are usually weaker than the ones that form in the winter.[1] Also, they are not closely studied and are rarely destructive since they happen in areas with little or no population.

One center is near Baffin Island and the other over northeast Siberia.[2] In the southern hemisphere, it is usually near the edge of the Ross ice shelf near 160 west longitude.[3]

References[change | edit source]

  1. Halldór Björnsson. Global circulation. Veðurstofa Íslands. Retrieved on 2008-06-15.
  2. Glossary of Meteorology (June 2000). Polar vortex. American Meteorological Society. Retrieved on 15 June 2008.
  3. Rui-Rong Chen, Don L. Boyer, and Lijun Tao (December 1993). "Laboratory Simulation of Atmospheric Motions in the Vicinity of Antarctica". Journal of the Atmospheric Sciences (American Meteorological Society) 50 (24): 4058–4079. doi:10.1175/1520-0469(1993)050<4058:LSOAMI>2.0.CO;2. http://ams.allenpress.com/perlserv/?request=get-abstract&doi=10.1175%2F1520-0469(1993)050%3C4058%3ALSOAMI%3E2.0.CO%3B2&ct=1. Retrieved 2008-06-15.
Cyclones and Tropical cyclones of the World
Cyclone - Tropical - Extratropical - Subtropical - Mesocyclone - Polar cyclone - Polar low