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Name: K Ward
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Question:
What makes wind?



Replies:
The wind is a fluid current set up by differing areas of pressure. More simply, if there exists a high pressure area in the atmosphere and there is a neighboring low pressure area, air will flow between the two to try and equalize the pressures. The air flow is what we call wind. This is a very simplified explanation, but it works in a similar manner for liquids except that it is density driven instead of pressure driven.

Woodford


To follow on the last response, high air pressure just means there are more molecules of air (02,N2,etc.) piled up there than in an area of low pressure. Thus the molecules "flow down hill" to the area of low pressure. You feel it as wind because molecules have mass so if enough of them bump into you, you feel it. The low pressure and high pressure areas usually form from differential heating. Hot air expands and rises and molecules flow away from it to colder areas and collect there.

Mark Fernau



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