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What is one reason for low rainfall in some parts of the Deccan Plateau?

Answer and explanation

Correct answer: Rain shadow effect

The rain shadow effect explains why some areas of the Deccan Plateau receive less rainfall. Moist winds from the Arabian Sea are forced to rise when they meet the Western Ghats. They cool and release much of their moisture on the windward western side. After crossing the mountains, the air descends on the leeward eastern side and becomes relatively drier. This sheltered area is called a rain shadow region. Hence option A is correct. The other options do not describe the physical reason for low rainfall there.

Low rainfall in the Deccan is therefore not caused by a polar location, sea ice or absence of sunlight. The plateau is in the tropics and receives sunlight, but the arrangement of the Western Ghats affects the distribution of monsoon rain. Rainfall also varies within the plateau, so the question wisely says some parts. The correct reasoning is based on relief and wind direction: the windward side gets more rain, while the leeward side may remain comparatively dry.

Related tags

ClimateDeccan-PlateauRain-Shadow

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