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← GeographyWhich atmospheric effect causes the formation of distinct desert regions around 30 degrees latitude?
A)Ozone depletion causing increased ultraviolet radiation
B)Rain shadow effect blocking coastal precipitation
C)Subtropical high-pressure zone descending air✓
D)Polar vortex influencing mid-latitude weather
💡 Explanation
When global air circulation patterns operate, descending air in the Hadley cell creates subtropical high-pressure zones around 30 degrees latitude because adiabatically heated and dried air suppresses precipitation. Therefore desert formation results, rather than ozone depletion, rain shadows, or the polar vortex, which require specific atmospheric preconditions.
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