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Which explanation best describes the rainfall difference between coastal Karnataka and interior Karnataka?

Answer and explanation

Correct answer: Western Ghats cause uplift rainfall near the coast and the interior falls in rain shadow

Rainfall is not equal everywhere because mountains affect the movement of moisture-filled winds. During the southwest monsoon, moist winds from the Arabian Sea reach the western side of the Western Ghats. As the air rises along the windward slope, it cools and produces heavy orographic rainfall. Coastal Karnataka lies close to this windward side and therefore receives much more rain.

After crossing the Western Ghats, the air has lost a large part of its moisture. The interior side lies in the rain-shadow region, so it generally receives less rainfall. This makes A the best explanation: the Ghats cause uplift rainfall near the coast and reduce rainfall inland. B is false because the interior is not more surrounded by sea. C is false because coastal Karnataka is not a desert, while D ignores the mountain effect and the actual regional difference. Thus, relief and wind direction explain the contrast.

Related tags

ClimateIndian MonsoonKarnataka

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