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Which outcome primarily occurs from downwelling's cascading effect in oceanic currents?

A)Enhanced surface nutrient concentration
B)Reduced deep water oxygen levels
C)Increased phytoplankton photosynthesis rates
D)Stabilized thermocline layer formation

💡 Explanation

Reduced deep water oxygen levels will be seen in areas with strong downwelling. This stratification traps low-oxygen water at depth via advection, because it prevents vertical mixing and therefore, the bottom layer's oxygen depletion increases rather than oxygenated water being delivered.

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