Geography • World GeographyHard
With reference to global wind systems and atmospheric cells, which of the following mechanisms drives the surface airflow within the Hadley cell between the Equator and 30 degrees latitude?
A. Westerlies blowing poleward from subtropical high-pressure ridges
B. Trade winds converging at the Intertropical Convergence Zone and returning aloft toward subtropical highs✓ Correct Answer
C. Polar easterlies descending from high-latitude anticyclones
D. Monsoonal land-sea breezes reversing on a semi-annual basis
💡 Solution & Explanation
The Hadley cell is a tropical atmospheric circulation feature where warm air rises at the equator, creating the low-pressure Intertropical Convergence Zone, flows poleward aloft, cools and descends at approximately 30 degrees latitude to form subtropical high-pressure belts, and returns to the equator as surface trade winds. Westerlies characterize the mid-latitude Ferrel cell, while polar easterlies operate in polar cells. The Coriolis force deflects these winds, creating reliable directional trade wind belts utilized by historical maritime navigators.
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