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polar front |
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polar front, zone of transition between polar and tropical air masses air mass, large body of air within the earth's atmosphere in which temperature and humidity, although varying at different heights, remain similar throughout the body at any one height. ..... Click the link for more information. . Its average position during the winter is at about 30° lat. and during the summer at about 60° lat. In the N Atlantic Ocean, for example, the polar front can often be traced as a continuous line extending over thousands of miles, usually toward the northeast from a point just off the coast of the United States at about 30°N. Most cyclones cyclone, atmospheric pressure distribution in which there is a low central pressure relative to the surrounding pressure. The resulting pressure gradient, combined with the Coriolis effect , causes air to circulate about the core of lowest pressure in a ..... Click the link for more information. outside the tropics develop along the polar front from waves caused by the juxtaposition of cold air moving toward the equator and hot air moving toward the poles; the earth's rotation gives this air its cyclonic twist. See front front, in meteorology, zone of transition between adjacent air masses . If a cold air mass is advancing to replace a warmer one, their mutual boundary is termed a cold front; if the reverse, then the boundary is termed a warm front, whereas a stationary front ..... Click the link for more information. . polar front [′pō·lər ′frənt] (meteorology) The semipermanent, semicontinuous front separating air masses of tropical and polar origin; this is the major front in terms of air mass contrast and susceptibility to cyclonic disturbance. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Shifts in the location of the polar front in the north Atlantic, where surface temperatures drop most dramatically, may have caused Eemian fluctuations, says Huntley. This project used wireless LAN technology to track information such as "ice crack" data and perform other studies of the polar front by tracking the frequency of sound pulses. 6 million years ago is also the time when scientists think the cyclical northward expansion of the Antarctic polar front, the boundary of very cold water and sea ice, began to intensify. |
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