Which mechanism initiates the accumulation of plastic debris within subtropical oceanic gyres?

💡 Explanation

When wind forces act on the ocean's surface, Ekman transport occurs because the Coriolis effect deflects the water, leading to the convergence of surface waters in the gyre center, accumulating floating debris. Therefore, Ekman transport initiates the accumulation, rather than tides, thermohaline currents, or direct wind trapping, which lack the convergence effect.

• Which process accelerates oxbow lake formation when tectonic subsidence lowers floodplain elevation?
• Which mechanism causes increased cirque erosion following deglaciation?
• Which outcome is most likely after an oxbow lake forms due to river meandering?
• Which event strongly promotes accelerated karst topography development?
• Which outcome increases when mountain stream downcutting declines?
• Which process generates elevated methane release from thermokarst lake formation in arctic permafrost regions?