NASA
Nasa: Ocean Motion: Wind Driven Surface Currents: Upwelling and Downwelling
Explains what upwelling and downwelling of ocean currents are, and the impact of Ekman transport and the Coriolis effect on current movement as well as where they occur. The effects of upwelling and downwelling on water temperature and...
CK-12 Foundation
Ck 12: Earth Science: Deep Ocean Currents
[Free Registration/Login may be required to access all resource tools.] Learn how water with different densities drives deep ocean circulation.