Polar high

Polar high

The polar highs are areas of high atmospheric pressure around the north and south poles. The cold temperatures in the polar regions cause air to descend to create the high pressure (a process called subsidence), just as the warm temperatures around the equator cause air to rise to create the low pressure doldrums.Surface temperatures under the polar highs are the coldest on Earth, with no month having an average temperature of above freezing. Regions under the polar high also experience very low levels of precipitation, which leads them to be known as "polar deserts".

Air flows outwards from the poles to create the polar easterlies in the arctic and antarctic areas.


Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать курсовую

Look at other dictionaries:

  • Polar low — over the Barents Sea on February 27, 1987 A polar low is a small scale, long lived atmospheric low pressure system (depression) that is found over the ocean areas poleward of the main polar front in both the Northern and Southern Hemispheres. The …   Wikipedia

  • Polar vortex — The polar vortex is a persistent, large scale cyclone located near the Earth s poles, in the middle and upper troposphere and the stratosphere. It surrounds the polar highs and is part of the polar front. Arctic and Antarctic variationThe vortex… …   Wikipedia

  • Polar easterlies — The polar easterlies are the dry, cold prevailing winds that blow from the high pressure areas of the polar highs at the north and south poles towards the low pressure areas of the polar fronts between 60 and 90 degrees north and south. Cold air… …   Wikipedia

  • Polar wind — is the permanent outflow of ionization from the polar regions of the magnetosphere. [http://amsglossary.allenpress.com/glossary/browse?s=p p=43 AMS Glossary] ] Ionospheric Plasma SourceThe ‘ground state’ of the ionosphere consists of the baseline …   Wikipedia

  • High-performance liquid chromatography — An HPLC. From left to right: A pumping device generating a gradient of two different solvents, a steel enforced column and an apparatus for measuring the absorbance. Acronym HPLC Classification Chromatography …   Wikipedia

  • Polar ecology — is the relationship between plants and animals in a polar environment. Polar environments are in the Arctic and Antarctic regions. Arctic regions are in the northern hemisphere, and it contains land and the islands that surround it. Antarctic is… …   Wikipedia

  • Polar fleece — Polar fleece, usually referred to simply as fleece, is a soft napped insulating synthetic fabric made from Polyethylene terephthalate (PET) or other synthetic fibers. One of the first forms was Polar Fleece created in 1979 by Malden Mills, now… …   Wikipedia

  • Polar stratospheric cloud — Antarctic stratospheric cloud (nacreous clouds) Abbreviation PSC Altitude 15,000–25,000 m (50,000–80,000 ft) …   Wikipedia

  • Polar (disambiguation) — Polar may refer to:As a noun: *Cervecería Polar, C.A., Venezuelan brewery and beer *Polar (artist), Norwegian electronic music artist *Polar (satellite), satellite launched by NASA in 1996. *Polar (album), second album by The High Water Marks… …   Wikipedia

  • High Visibility — Álbum de The Hellacopters Publicación 16 de octubre de 2000 Género(s) Hard rock Garage rock Duración 40 minutos …   Wikipedia Español

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”