What exactly is wind and where does it come from?

Answer 1

Wind is caused by the uneven heating of the earth's surface. This produces regions that are warm where because the lower atmosphere gets heated it begins to rise, and it produces regions that are colder where the lack of heat causes the cold atmosphere to fall. Winds result from air being pushed away from those cold (high pressure) regions towards those warm (low pressure) regions. If the earth did not rotate the winds in both Northern and Southern hemispheres would blow directly towards the equator, since that's the warmest region of the planet. The rotation of the earth causes a more complex pattern to occur where you have wind belts - 3 in the southern hemisphere and 3 in the Northern hemisphere. Most of the United States is situated in the middle wind belt of the Northern hemisphere where winds blow primarily from west to east. So if you watch the weather channel you can often see these systems like storms moving towards the east coast.

Answer 2

Wind is the rough horizontal movement of air (as opposed to an air current) caused by uneven heating of the Earth's surface. It occurs at all scales, from local breezes generated by heating of land surfaces and lasting tens of minutes to global winds resulting from solar heating of the Earth. The two major influences on the atmospheric circulation are the differential heating between the equator and the poles, and the rotation of the planet (Coriolis effect).

Given a difference in barometric pressure between two air masses, a wind will arise between the two which tends to flow from the area of high pressure to the area of low pressure until the two air masses are at the same pressure, although these flows will be modified by the Coriolis effect in the extratropics.

Winds can be classified either by their scale, the kinds of forces which cause them (according to the atmospheric equations of motion), or the geographic regions in which they exist. There are global winds, such as the wind belts which exist between the atmospheric circulation cells. There are upper-level winds, such as the jet streams. There are synoptic-scale winds that result from pressure differences in surface air masses in the middle latitudes, and there are winds that come about as a consequence of geographic features such as the sea breeze. Mesoscale winds are those which act on a local scale, such as gust fronts. At the smallest scale are the microscale winds which blow on a scale of only tens to hundreds of metres and are essentially unpredictable, such as dust devils and microbursts.

Winds can also shape landforms, via a variety of eolian processes.

Answer 3

Wind is movement of air, typically meaning "from natural causes" though if you refer to the air moving due to a fan, that could be called wind just as well.

Wind occurs when there are different air pressures. Air, like any fluid, moves from areas of high concentration (pressure) to areas of low concentration. So, if there is a low pressure system, air tends to move toward it.

Answer 4

It's the movement of air caused by pressure differences in the atmosphere.

Answer 5

wind is nothing but moving air.the movement is caused by the difference in pressure between regions

Answer 6

do u know from where the water comes from? do u know from where the clouds come from? nature cannot be defined exactly..