Which of the following is the primary reason for the pre-monsoon thunderstorms in West Bengal and Assam?
A. Orographic lifting
B. Cyclones
C. Western Disturbances
D. Convection
Answer: Option D
Solution (By JKSSB Mock Tests)
Pre-monsoon thunderstorms, often called 'Nor'westers' or 'Kal Baisakhi', are caused by strong convection from intense surface heating, drawing in moist air from the Bay of Bengal.
Explanation:
Tropical deserts form due to a combination of factors, including subtropical high pressure (descending dry air), cold ocean currents (which stabilize the atmosphere), and rain shadow effects from nearby mountains.
Explanation:
The troposphere is the layer of the atmosphere closest to the Earth's surface and contains most of the weather phenomena, including clouds, rain, storms, and winds.
Explanation:
Tropical continental air masses are warm and dry, originating over hot desert regions like the Sahara. They bring hot, dry, and stable weather with clear skies.
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