how do winds form?

Question

how do we have wind

Answer 1

There are 2 main types of winds:

1) Local Winds
2) Planetary Winds

Local Winds:

Local Winds are formed due to the difference in pressure between 2 areas. This difference in pressure is normally caused difference in temperature which may be due to several geographical factors. When the temperature rises, it causes a region of low pressure and when the temperature falls, a region of high pressure is created. Air always moves from high pressure regions to low pressure regions, therefore, When the air pressure in a region is higher, the winds blow away from the region, whereas, when there is low pressure, winds blow towards the area. Examples of local winds are "Loo" in India and "Sirocco" in Africa.

Planetery Winds:

When the rays of the sun fall on the Tropic of Cancer, a region of low pressure is formed over the Tropic of Cancer due to the increase in temperature.Therefore, winds blow north, towards the Tropic of Cancer. As they pass over the equator, they get deflected to the right of their path due to Feral's Law. These winds may cause rainfall, after travelling over the ocean, if they are forced to rise by some physical features (e.g - mountain ranges). Similarly, in the Southern Hemisphere, when the Sun's rays fall on the Tropic of Capricorn, a region of low pressure is created over the Tropic of Capricorn and tha winds blow southward.

Therefore, winds are caused by movements of air from high pressure zones to low pressure zones.

I hope I've helped in some small way, and I hope I wasn't too confusing.

Answer 2

There are different zones with different presure. So when there is a difference of presure between 2 zones there apears the wind. The wind blows from the place where the pressure is higher to the place where the presure is lower.

Answer 3

Wind, tacuinum sanitatis casanatensis (XIV century)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.

Answer 4

Winds blow from areas of high pressure to areas of low pressure to try to equalise them.

Also, a hot area will cause thermals ... rising masses of hot air. Cold air rushes in to take its place.