why are there low pressure belts in the sub polar regions?

Answer 1

Due to differential heating, earth heats more at the equator than the poles, so there is a net poleward energy flow within the atmosphere. The Coriolis effect from earth's rotation sets the resulting winds into Hadley cells, which produces low pressure at the equator and sub polar areas, high pressure at mid latitudes, and low sub-polar pressures, as well as trade winds, doldrums, and jet streams. Jupiter rotates faster and has a thicker atmosphere, the result is more wind bands in the same sort of pattern, also due to differential solar heating.

Answer 2

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Not sure why you would ask a question about weather in Astronomy & Space. There are 2 forms of weather pressure belts: - a Low Pressure belt results in stormy, cloudy and rainy weather - a High Pressure belt results in a calm and dry atmosphere In a nutshell: The warm equator is a zone of low pressure (warm air rises). The cold poles are zones of high pressure (cold air sinks). The warm air rises from the equatorial region and moves towards the poles where it sinks back down, creating high pressure zones at around latitudes 30 N and 30 S. Between those latitudes and the poles are areas of low pressure at roughly latitude 60 N and 60 S. Those "belts" of pressure are why we find belts of wind (the westward Trade Winds on both sides of the equator and between it and the sub-tropical high pressure, and the eastward winds found with the polar fronts, associated with the jet streams)

Answer 3

Earth receives a maximum solar radiation in the equatorial regions and a minimum quantity of it in polar regions.So a temperature gradient is created from the equator to the poles.Because of this, there would have been a flow of air from the poles towards the equator at the surface level and a reverse flow aloft provided the earth's surface is uniform and the earth is not rotating.
But the earth's surface is not unifom to allow a free flow and the earth is also rotating creating three cells of wind circulation.
Because of the rotation of the earth,the air moving to higher latitudes will become westerly(due to coriolis effect) and gain in speed and the air moving towards the equator will become easterly(again due to coriolis effect) and gain more and more speed.Since wind speeds can not be going on increasing beyond certain limits,the above envisaged circulation breaks into three different circulations depending upon the speed of rotation of the earth.If the speed were to be more,probably the circulations may be more than the above mentioned three circulations.These three circulations are called Hadley cell,Ferner cell and Polar cell.
To accomadate these three cells, there are four alternate(low and high)pressure belts between the polar high and the equatorial low(including the latter two belts).So the next pressure belt, from the polar high towards the equator happens to be a low pressure belt which lies in the sub polar region.

Answer 4

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why are there low pressure belts in the sub polar regions?

Answer 5

In terms of pressure belts in Weather, there are two distinct forms or variations. There is a Low Pressure belt which results in stormy, cloudy and rainy weather. Accordingly, there is also a High Pressure belt which naturally results in a calm and dry atmosphere. These pressure belts are effected by warming and cooling of the air.

Answer 6

Subpolar Low

Answer 7

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