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← GeographyWhich thermocline response intensifies due to Niño events?
A)Eastern Pacific upwelling decline✓
B)North Atlantic Deep Water formation
C)Antarctic Bottom Water increase
D)Global sea ice extent growth
💡 Explanation
An intensified Walker circulation causes increased upwelling decline in the Eastern Pacific via suppressed thermocline tilting during El Niño. This is because weaker trade winds reduce surface water displacement, therefore the absence of upwelling reduces nutrient availability, rather than increasing deep water formation in polar regions.
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