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← GeographyWhich consequence occurs when a coastline obstructs gyre circulation?
A)Increased coastal upwelling velocity✓
B)Decreased surface salinity levels
C)Intensified thermocline layer formation
D)Reduced deep-sea current velocity
💡 Explanation
Coastline obstruction forces water upwards via Ekman transport, therefore upwelling increases where deflected gyre circulation impinges on shallow-water regions near the coast, rather than altering salinity, thermocline, or deep-sea currents.
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