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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).
âThey are there,â he said. âThere are hundreds of thousands of objects there and that is the garbage patch.â. The North Pacific gyre is the size of around 9 million soccer field, and contains 30 percent of the worldâs ocean garbage. âIf you leave LA and you sail towards Hawaii, after maybe 400, 500 miles you begin to see little tiny fragments of plastic trash,â Eriksen said.