polar front

polar front,

zone of transition between polar and tropical air massesair 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 cyclonescyclone,
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 counterclockwise direction
..... 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 frontfront,
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 indicates that no
..... Click the link for more information. .

Polar Front

an atmospheric front arising at the boundary between an air mass originating outside the tropical latitudes and one originating within the tropical latitudes, that is, between polar, or cooler, air and tropical air. The polar front in each hemisphere usually consists of several separate branches, each of which is associated with a series of cyclones that develop along it.

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.

polar front

Typical polar front depression in the Southern Hemisphere.A semipermanent and semicontinuous front separating air masses of tropical and polar origin.

polar front

polar front

polar front

po′lar front`

polar front

polar front,

Polar Front

polar front

polar front

polar front

Synonyms for polar front

noun the front of an advancing mass of colder air

Synonyms

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