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← GeographyWhich effect influences Sargassum seaweed accumulation in North Atlantic gyres?
A)Persistent upwelling of nutrient-rich water
B)Ekman transport driving surface convergence✓
C)Increased thermocline depth suppressing mixing
D)Coastal erosion releasing organic matter
💡 Explanation
When winds interact with surface waters, Ekman transport causes surface currents to converge toward the center of the gyre because the Coriolis effect deflects the currents. Therefore, Sargassum accumulates due to convergence, rather than upwelling, thermocline depth, or coastal erosion which involve different nutrient and sediment transport mechanisms.
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