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in In search of the Source of Wind by (33.7k points)
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Explain about the planetary winds. 

OR 

Global pressure belts pave the way for the formation of planetary winds. Explain the inter-relationship between the two.

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Pressure differences exist globally between different latitudinal zones. These pressure difference lead to the formation of winds. The winds developed between global pressure belts are called planetary winds. There are three types of planetary winds.

1. Trade winds

2. Westerlies 

3. Polar easterlies

1.Trade winds: Trade winds are the winds blowing from subtropical high pressure belts to equatorial low pressure belt. These winds blow as north east winds in Northern Hemisphere and south east winds in Southern Hemisphere. The zone where trade winds from both the Hemispheres converge is known as Inter Tropical Convergence Zone.

2. Westerlies: The winds blowing from the subtropical high pressure belts in both the hemisphere towards the subpolar low pressure belts are called Westerlies. As they blow from the west, they are called westerlies. In the Northern Hemisphere, they blow from the south western direction to the north eastern direction. But in the Southern Hemisphere, they blow from the north western direction to the south eastern direction. Due to the presence of vast oceans in Southern Hemisphere, the westerlies are very strong here. Here they are known by different names like Roaring Forties, Furious Fifties and Shrieking Sixties.

3. Polar easterlies: Polar regions are centres of high pressure. The polar winds are cold winds that blow from polar high pressure belts to subpolar low pressure belts. Due to Coriolis force, these winds blow from the east in both the hemispheres. Hence they are called Polar easterlies. Polar winds play a significant role in determining the climate of North America, North European countries and Russia.

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