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What causes ocean currents? Ocean currents result from two processes - the action of wind on the surface of the water, and from variation in water temperature that causes movement- a process known as convection. Convection occurs because the oceanic waters heat up becoming less dense. This water moves above the cooler water, and give off its heat to the surrounding environment. As it cools, it begins to sink, and the process begins again. Convection results in the continual circulation of ocean water on a global scale.
Surface currents in the ocean are primarily driven by the wind. Examine the relationship between global wind directions and the direction of surface currents. Notice that currents flowing toward the equator are generally cool and currents flowing away from the equator are warm.xamine the relationship between global wind directions and the direction of surface currents. Notice that currents flowing toward the equator are generally cool and currents flowing away from the equator are warm.