Which mechanism leads to increased oxygen depletion in deep fjord waters during strong stratification events?

💡 Explanation

During strong stratification, a halocline or thermocline prevents vertical mixing because density differences resist overturning, reducing oxygen replenishment to the depths. Therefore reduced vertical mixing leads to depletion, rather than photosynthesis, freshwater inflow, or dissolution providing oxygen. These usually have the opposite effect or impact surface levels.

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