Singapore GCE A-Level H2 Geography Practice Questions - Singapore GCE A-Level H2 Geography (SEAB Syllabus 9173) Exam

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In the idealised single-cell model of tropical atmospheric circulation, what causes the descent of dry air at approximately 30° North and South latitudes in the Hadley Cell?

Radiative cooling of rising air and poleward momentum conservation causing air mass convergence aloft Surface friction creating local low-pressure cells at subtropical ridges Evaporative cooling from warm subtropical ocean waters Intense surface heating forcing upper-level divergence toward the equator

Correct Answer:

Radiative cooling of rising air and poleward momentum conservation causing air mass convergence aloft

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