3.What are the factors affecting air pressure? 4.Why is the air pressure high in polar areas in both the hemispheres?
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In both the polar regions, the temperature is below 0°C throughout the year. Hence here the air is cold. Therefore, the air pressure is high in polar areas in both hemispheres.
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3.Temperature.
Altitude.
Rotation of the Earth
4.The cold temperatures in the polar regions cause air to descend to create the high pressure (a process called subsidence), just as the warm temperatures around the equator cause air to rise to create the low pressure intertropical convergence zone. ... Closely related to this concept is the polar vortex
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