SSC
WORLD GEOGRAPHY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Rising air near the Equator
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Calm areas at the edge of the Tropics
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Latitude and the Earth’s movement
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Diagonal movement of air
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Detailed explanation-1: -Generally, prevailing winds blow east-west rather than north-south. This happens because Earth’s rotation generates what is known as the Coriolis effect. The Coriolis effect makes wind systems twist counter-clockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere.
Detailed explanation-2: -The speed of the wind is determined by the pressure gradient. The winds are strongest in regions where the isobars are close together. Surface friction plays an important role in the speed and direction of surface winds.
Detailed explanation-3: -The speed and direction of the wind is governed by three forces; the pressure gradient force (PGF), the Coriolis Force and friction. PGF is the force produced by differences in barometric pressure between two locations and is responsible for the flow of air from an area of high pressure to an area of low pressure.
Detailed explanation-4: -There are three prevailing wind belts in each hemisphere, Tropical Easterlies: From 0-30 degrees latitude (Trade Winds). Prevailing Westerlies: From 30-60 degrees latitude (Westerlies). Polar Easterlies: From 60-90 degrees latitude.