Which biogeochemical consequence results when the slow water circulation within subtropical gyres intensifies due to increased stratification?

💡 Explanation

When subtropical gyre water circulation slows from increased stratification, nutrient replenishment from deeper waters reduces because the thermocline shoals decreasing the rate of vertical mixing. Therefore decreased primary productivity ensues, rather than increased upwelling, carbon sequestration, or oxygen increase, which rely on more active mixing.

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