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Which outcome is caused when excessive freshwater influx weakens ocean gyre downwelling?

A)Increased deep ocean nutrient concentration
B)Acceleration of global thermohaline circulation
C)Intensified coastal upwelling near continents
D)Decreased regional oceanic carbon sequestration

💡 Explanation

Reduced downwelling limits the transfer of surface carbon to deeper waters via the Solubility Pump because vertical stratification prevents mixing; therefore oceanic carbon sequestration decreases, rather than increasing nutrient upwelling or accelerating circulation.

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