Which of the following is the primary reason for the pre-monsoon thunderstorms in West Bengal and Assam?
A. Cyclones
B. Convection
C. Western Disturbances
D. Orographic lifting
Answer: Option B
Solution (By JKExamLibrary)
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:
The heating of the Tibetan Plateau during the pre-monsoon season plays a crucial role in the onset of the Indian monsoon by creating a large thermal low that draws in moist air from the ocean.
Explanation:
A positive IOD (warmer waters in the western Indian Ocean) is generally associated with a stronger Southwest Monsoon and good rainfall in India.
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