The three prevailing winds are the trade winds, the westerlies, and the polar easterlies.
The trade winds are a pattern of winds that blow from the northeast in the Northern Hemisphere and from the southeast in the Southern Hemisphere. They are caused by the difference in pressure between the equator and the poles, and they blow towards the equator.
The westerlies are a pattern of winds that blow from the west in the middle latitudes of both the Northern and Southern Hemispheres. They are caused by the Coriolis effect, which is the result of the Earth's rotation.
The polar easterlies are a pattern of winds that blow from the east towards the poles in the high latitudes of both the Northern and Southern Hemispheres. They are also caused by the difference in pressure between the equator and the poles.
These three patterns of winds are the most dominant and persistent wind patterns on Earth, and they are responsible for much of the Earth's weather and climate.
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