Which process limits plastics concentration within an oceanic garbage patch formed by a gyre?

💡 Explanation

When buoyant plastics enter a gyre, biofouling gradually increases their density allowing eventual sinking below detection because microbial growth adds weight. Therefore sinking is the outcome, rather than, wave action which is generally inward, or significant decomposition which is comparably low, or efficient turbulent mixing of lightweight objects.

• Which effect results when approaching air masses deflect in the northern hemisphere due to planetary vorticity?
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• Which increased risk emerges when thawing permafrost destabilizes earthen dam infrastructure?
• Which geographic effect on regional climate results when a mountain range obstructs prevailing winds?
• Which impact follows accelerated oxbow lake formation near pipeline infrastructure when a river alters course?
• Which risk increases when a large coastal levee system experiences prolonged saltwater intrusion?