Geography • Physical GeographyHard
Which of the following microscale meteorological phenomena explains the occurrence of high relative humidity and localized sea breezes experienced along the coastal plains of Kerala throughout the year?
A. Differential thermal heating between the landmass and the adjacent Arabian Sea, creating pressure gradients that drive diurnal wind reversals✓ Correct Answer
B. Katabatic drainage of cold air masses descending from the Nilgiri plateau during afternoon hours
C. Persistent adiabatic compression of air descending from the troposphere over equatorial low-pressure belts
D. Foehn wind effects generated by dry winds crossing over high mountain ranges from the interior plateau
💡 Solution & Explanation
Sea breezes and land breezes are driven by thermal contrasts between land and sea. During the day, land heats faster than the Arabian Sea, creating low pressure over land and drawing cool, moisture-laden air inland, maintaining high humidity. Katabatic winds flow downslope at night rather than afternoon. Adiabatic compression warms air but does not cause diurnal coastal wind reversals. Foehn winds are warm dry winds on lee slopes, unlike the moist maritime sea breeze of Kerala. This diurnal breeze moderates coastal temperatures significantly.
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