 Coastal upwelling is the best known type of upwelling, and the most closely related to human activities as it supports some of the most productive fisheries in the world.Wind-driven currents are diverted to the right of the winds in the Northern Hemisphere and to the left in the Southern Hemisphere due to the Coriolis effect.The result is a net movement of surface water at right angles to the direction of the wind, known as the Ekman transport (See also Ekman Spiral).