the front of an advancing mass of colder air
The boundary between the colder air of the polar regions and the warmer air of the tropics. The wind generated at polar fronts helps to power polar-front jet streams.
A surface boundary where which the colder, north flowing Antarctic Surface Waters sink beneath warmer circulating waters. This marks a change in the oceans surface temperature and also chemical composition. North of the convergence, the area is known as the sub-Antarctic.
The line of discontinuity, which is developed in suitable conditions between air originating from polar regions and air from low latitudes, and on which the majority of the depressions of temperate latitudes develop. It can sometimes be traced as a continuous wavy line thousands of miles in length, but it is interrupted when polar air breaks through to feed the trade winds, and is often replaced by a very complex series of fronts, or by continuous gradients of temperature.
A front dividing tropical and polar air masses.
Weather front located typically in the mid-latitudes that separates arctic and polar air masses from tropical air masses. Along the polar front we get the development of the mid-latitude cyclone. Above the polar front exists the polar jet stream.
The surface between polar and tropical air masses, along which cyclonic disturbances form.
1. According to the polar-front theory, 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. Compare arctic front. 2. In oceanography, see Antarctic Polar Front, Arctic Polar Front.
A semi-continuous, semi-permanent boundary between polar air masses and tropical air masses. An integral part of an early meteorological theory known as the Polar Front Theory.
In meteorology, a Polar Front is the boundary between the polar cell and the Ferrel cell in each hemisphere. At this boundary a sharp gradient in temperature occurs between these two air masses, each at very different temperatures.
