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Additionally, the surface currents may be very different than currents at depth, which can make launching and recovering submersibles an even greater challenge. Surface currents are generated largely by wind. Their patterns are determined by wind direction, Coriolis forces from the Earthâs rotation, and the position of landforms that interact with the currents. Surface wind-driven currents generate upwelling currents in conjunction with landforms, creating deepwater currents.
Wind-driven currents are caused by the return of large circulation cells, of which there are three between the equator and the poles. Find out how circulation cells also move heat over the planet with help from the chair of a department of environmen...tal studies in this video (02:29) on wind-driven currents.