Geography • Physical GeographyHard
In the analysis of microscale atmospheric boundary layer dynamics along the coastal plains of Kerala, which parameter best explains the maintenance of high daytime relative humidity even during periods of intense solar heating?
A. Continuous moisture advection via sea breezes combined with high evapotranspiration rates from dense coastal vegetation and wet estuarine surfaces✓ Correct Answer
B. Subsidence of dry air masses from upper tropospheric jet streams compressing over the coastal fringe
C. Complete absence of solar radiation due to permanent cloud cover throughout the calendar year
D. Extensive presence of deep sub-surface saline aquifers that actively pump water vapor upward through bedrock fissures
💡 Solution & Explanation
High relative humidity along the Kerala coast is sustained by the continuous onshore advection of moisture-laden air via sea breezes, reinforced by intense evapotranspiration from lush coastal vegetation and extensive backwater bodies. Subsidence of dry air would lower relative humidity, and the coast experiences abundant sunshine outside the monsoon months. Sub-surface aquifers do not pump water vapor through bedrock fissures via active mechanisms. This high humidity is a defining characteristic of the regional tropical maritime climate.
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