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← GeographyWhich effect increases when coastal upwelling intensifies parallel to the shoreline above a fishing ground?
A)Surface water temperature decreases✓
B)Ocean salinity decreases rapidly
C)Dissolved oxygen concentration increases
D)Thermocline depth increases significantly
💡 Explanation
When upwelling intensifies, nutrient-rich, cold water rises to the surface due to Ekman transport, because surface waters diverge away from the coast, replacing that water and drawing from below. Therefore surface water temperature decreases, rather than altering salinity, oxygen, or thermocline which require different mixing processes.
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