what causes wind? (as in weather)?

Answer 1

Wind is caused by pressure gradients between a High and Low pressure. It is also caused by a change of air masses ie: a cold front replacing a warm air mass and the strength of a Low or High with their counter clock wise and clockwise flow respectively. The sun causes wind also, especially when the air temperature is relatively cool, the sun's heat is absorbed by the earth's dark colored surfaces and raises to the upper stratosphere, which in most cases forms clouds. Wind can be increased from a downdraft from a mountain and vice-versa. And last but not least, the sea breeze which is formed when the earth's temperature exceeds the water temperature by ten or more degrees.

Answer 2

Excellent question.The wind is the result of three forces acting on a given parcel of air - pressure differences move the air to begin with, and once the air begins to move it is affected by friction if it is near the earth's surface and the coriolis force which accelerates the air to the right in the northern hemisphere and to the left of the direction of flow in the southern hemisphere. The initial pressure differences which begin the process of air flow are caused by differential heating of the earth's surface.

Answer 3

Air temperature and pressure variances that can be caused by climate, ocean, land, man-made structures. This site explains it all really much better than I can.