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← GeographyWhich outcome primarily occurs when coastline geometry impedes a wind-driven oceanic gyre's rotation?
A)Intensified coastal upwelling currents✓
B)Decreased regional water salinity
C)Weakened thermohaline circulation
D)Increased global sea temperatures
💡 Explanation
When a coastline restricts gyre circulation, pressure gradients increase and cause Ekman transport divergence near the coast because water moving offshore is locally replaced by upwelling. Therefore intensified coastal upwelling currents result, rather than salinity changes, impaired thermohaline circulation, or global temperature increase which each require different forcing mechanisms.
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