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Wind and Currents Motion in the Ocean Coriolis Effect • This effect is caused by the rotation of the Earth. • Anything that moves on the surface tends to move to one side. • Winds in the northern hemisphere blow to the right and winds in the southern hemisphere blow to the left. Global Wind Systems Trade Winds • Ground-level winds that flow toward the equator • Air rises at the equator and sinks at 30 due to temperature differences. Prevailing Westerlies • Winds that occur between 30 and 60 degrees latitude. • The air moves towards the poles and appears to curve to the east. • Causes U.S. weather patterns. • Winds that occur at 60 degrees latitude. • They are formed when the air over the poles cools and sinks, flowing away from the Earth's poles toward the west. Polar Easterlies Gyres • Gyres – major surface currents. They help regulate Earth’s temp by carrying warm water north and cold water south. Where do we find Kelp and Coral? Kelp – found on the eastern side of gyres when cold water moves toward the equator. Corals – found on the western side of gyres when warm water moves northward. Ekman Transport • Ekman Transport – moves water 90 degrees from the wind direction. This mixes ocean water.