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If moist maritime air strikes a mountain and gives rain on the windward side what is the main cause of dryness on the leeward side?

Answer and explanation

Correct answer: Moisture loss after rain and warming of descending air

Correct answer: B. Moist maritime air is forced upward on the windward slope. As it rises, it cools, condensation occurs, clouds form, and much of its moisture may fall as rain. After crossing the mountain, the air descends on the leeward side. Descending air is compressed and warms, which lowers its relative humidity and makes further condensation less likely. Because the air has already lost much of its moisture on the windward side and becomes warmer while descending, the leeward side receives less rainfall and may form a rain-shadow region. A is wrong because the key process is not simply returning to the sea. C is wrong because the mountain does not create water vapour as the main cause of dryness. D is wrong because air is present on the leeward side. Memory cue: wet windward ascent, dry leeward descent.

Related tags

Rain ShadowOrographic RainfallLeeward DrynessClouds And PrecipitationWater In The AtmosphereGeographyClass 12 Mcq

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