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A gyre in oceanography is any large system of rotating ocean currents, particularly those involved with large wind movements. Gyres are caused by the Coriolis effect; planetary vorticity along with horizontal and vertical friction, which determine the circulation patterns from the wind curl (torque).
What I find astonishing is that out of all the gyre cleanup proponents Iâve met, none of them have ever been to the gyres. The ocean surface is 315 million square kilometers; 70% of the earthâs surface. Plastic isnât just contained within the borders of the gyres, itâs everywhere in the ocean.