Citizendia

The polar vortex is a persistent, large-scale cyclone located near the Earth's poles, in the middle and upper troposphere and the stratosphere. In Meteorology, a cyclone refers to an area of closed circular fluid motion rotating in the same direction as the Earth. The Polish people, or Poles, (Polacy) are a Western Slavic Ethnic group of Central Europe, living predominantly in Poland. The troposphere is the lowest portion of Earth's atmosphere. It contains approximately 75% of the atmosphere's mass and almost all of its Water vapor and The stratosphere is the second major layer of Earth's atmosphere, just above the Troposphere, and below the Mesosphere. It surrounds the polar highs and is part of the polar front. 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 In Meteorology, the polar front is the boundary between the polar cell and the Ferrel cell in each hemisphere

Contents

Arctic and Antarctic variation

The vortex is most powerful in the hemisphere's winter, when the temperature gradient is steepest, and diminishes or can disappear in the summer. V erification of the O rigins of R otation in T ornadoes Ex periment or VORTEX, is a field project that seeks to understand how a "Globose" redirects here See also Globose nucleus. A sphere (from Greek σφαίρα - sphaira, "globe Winter is one of the four Seasons of Temperate zones Calculated astronomically, it begins on the Solstice and ends on the Equinox In atmospheric sciences ( Meteorology, Climatology and related fields the temperature gradient (typically of air, more generally of any Fluid Summer is one of the four Temperate Seasons Summer marks the warmest time of year with the longest days The Antarctic polar vortex is more pronounced and persistent than the Arctic one; this is because the distribution of land masses at high latitudes in the northern hemisphere gives rise to Rossby waves which contribute to the breakdown of the vortex, whereas in the southern hemisphere the vortex remains less disturbed. The Arctic is the Region around the Earth 's North Pole, opposite the Antarctic region around the South Pole. Rossby (or planetary) waves are giant Meanders in high-altitude winds that are a major influence on Weather. The Arctic vortex is elongated in shape, with two centres, one roughly over Baffin Island in Canada and the other over northeast Siberia. Baffin Island (ᕿᑭᖅᑖᓗᒃ Qikiqtaaluk, Île de Baffin Old Norse: Helluland) in the territory of Nunavut is the largest member Country to "Dominion of Canada" or "Canadian Federation" or anything else please read the Talk Page Siberia (Сиби́рь Sibir) is the name given to the vast region constituting almost all of Northern Asia and for the most part currently serving

Ozone depletion

The chemistry of the Antarctic polar vortex has created severe ozone depletion. Ozone depletion describes two distinct but related observations a slow steady decline of about 4 percent per decade in the total amount of Ozone in Earth's The nitric acid in polar stratospheric clouds reacts with CFCs to form chlorine, which catalyzes the photochemical destruction of ozone. Polar stratospheric clouds ( PSCs) also known as nacreous clouds, are Clouds in the winter polar Stratosphere at altitudes of 15000&ndash25000 Chlorine (ˈklɔriːn from the Greek word 'χλωρóς' ( khlôros, meaning 'pale green' is the Chemical element with Atomic number 17 and Catalysis is the process in which the rate of a Chemical reaction is increased by means of a Chemical substance known as a catalyst OZONE is an object oriented Operating system written in the C programming language. Chlorine concentrations build up during the winter polar night, and the consequent ozone destruction is greatest when the sunlight returns in spring (September/October). These clouds can only form at temperatures below about -80°C. The Celsius Temperature scale was previously known as the centigrade scale. Since these temperatures are rarely reached in the Arctic, ozone depletion at the north pole is much less severe than at the south. Accordingly, the seasonal reduction of ozone levels over the Arctic is characterized as an "ozone dent," whereas the more severe ozone depletion over the Antarctic is considered an "ozone hole. "

Duration

The Antarctic Polar Vortex typically lasts from August to November.

Outside earth

Other astronomical bodies are also known to have polar vortices, including Venus (double vortex - that is, two polar vortices at a pole [1]), Mars, Jupiter, Saturn and Saturn's moon Titan. The VENUS ( V ictoria E xperimental N etwork U nder the S ea project is a cabled sea floor observatory operated by the University TemplateInfobox Planet.--> Titan (ˈtaɪtən, or as

References

© 2009 citizendia.org; parts available under the terms of GNU Free Documentation License, from http://en.wikipedia.org
 Dapyx Software network: MP3 Explorer | Ebook Manager | Zenithic