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← GeographyWhich risk increases during El Niño because atmospheric Hadley cell circulation disruptions occur?
A)Decreased upwelling off Peru coast✓
B)Increased strength of trade winds
C)Weakening mid-latitude cyclone severity
D)Enhanced Antarctic ice sheet stability
💡 Explanation
A strong El Niño disrupts normal Hadley cell patterns, causing a weakening of the usual upwelling off the coast of Peru because equatorial trade winds stall preventing the Ekman transport of surface water. Therefore, upwelling decreases, rather than other atmospheric phenomena occurring under normal conditions.
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