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Geography

Which consequence results when deep ocean thermohaline circulation stalls?

A)Nutrient upwelling greatly diminishes
B)Salinity gradients become indistinct
C)Coastal erosion accelerates drastically
D)Deep-sea methane clathrates destabilize

💡 Explanation

Diminished nutrient recycling occurs when thermohaline circulation weakens because upwelling reduces, driving fewer nutrients into the photic zone; therefore nutrient upwelling decreases, rather than changes to salinity, erosion, or hydrate destabilization because these are controlled by other processes.

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