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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.
A long-shore current is an ocean current that moves parallel to shore. It is caused by swells sweeping into the shoreline at an angle and pushing water down the length of the beach in one direction.ong-shore currents are common at any beach that is exposed to breaking surf. They are responsible for many rescues along the coast by sweeping swimmers and surfers down the beach into a variety of hazards.