Which of the following is the primary reason for the formation of rain shadow deserts?
A. Mountains blocking moisture-laden winds
B. Subtropical high pressure
C. Monsoon winds
D. Cold ocean currents
Answer: Option A
Solution (By JKSSB Mock Tests)
Rain shadow deserts form when mountains block moisture-laden winds from reaching the leeward side. As air rises over the mountains, it cools and releases precipitation on the windward side, leaving the leeward side dry.
Explanation:
The Thar Desert receives low rainfall due to its location in the rain shadow of the Aravalli Range, the influence of the subtropical high-pressure belt, and its distance from the sea.
Explanation:
During a La Niña event, the Walker Circulation strengthens as the trade winds intensify, pushing warm water further westward in the Pacific. This often results in heavy rainfall in Southeast Asia and Australia.
Explanation:
The West African monsoon is driven by sea surface temperature differences in the Gulf of Guinea, land-sea temperature contrast over the Sahara, and the northward migration of the Intertropical Convergence Zone (ITCZ).
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