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i am asking even people from NASA to answer this question!!!

2007-08-19 03:23:03 · 2 answers · asked by hhawil 1 in Science & Mathematics Weather

2 answers

I'm guessing you are asking why they rotate. That is because they are low pressure systems. Since the atmosphere is always trying to equalize pressure, air from outside the low pressure area moves toward it. As it does so, physical forces acting on this air movement result in the air flow "curving" as it moves more inward. Thus rotation is acquired. Low pressure systems rotate counter-clockwise in the northern hemisphere, and clockwise in the southern hemisphere, where the effects are reversed.

2007-08-19 03:35:49 · answer #1 · answered by cyswxman 7 · 0 0

This is due to the coriolis force which is an apparent force brought about by the rotation of the earth about its axis.This makes any low pressure system in the Northern hemisphere to rotate in anti-clockwise direction.
Whenever a low pressure system forms,the air sorrounding it tries to enter the low pressure area and converge at its centre.At that time coriolis force acts and makes the winds to rotate in a circular path.The rotation is clockwise in the southern hemisphere.The coriolis force is maximum at the poles and zero at the equator.Hence cyclones or hurricanes do not form near(within 5 to 6 degrees) the equator.

2007-08-19 12:35:37 · answer #2 · answered by Arasan 7 · 1 0

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