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← GeographyWhich mechanism distributes floating plastics throughout the North Pacific Gyre?
A)Ekman transport concentrates surface debris✓
B)Wave refraction redirects nearshore pollution
C)Geostrophic flow expels buoyant materials
D)Tidal mixing dilutes particle concentrations
💡 Explanation
When plastics enter the North Pacific Gyre, Ekman transport drives surface currents that converge due to wind patterns and the Coriolis effect, creating zones of accumulation that concentrate buoyant debris. Therefore Ekman transport causes concentration, rather than preventing it by dilution, geostrophic flow or refraction.
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