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    Lec 22 - Ocean Currents and Productivity

    "Lec 22 - Ocean Currents and Productivity " The Atmosphere, the Ocean and Environmental Change (GG 140) Ocean currents are generally divided into two categories: thermohaline currents and wind driven currents. Both types of currents are forced remotely rather than locally. Wind driven currents are initially forced by the wind stress causing water to pile up in certain locations. This produces a pressure gradient, which is then balanced by the Coriolis force and geostrophic currents develop. The gyre circulations found in the Atlantic and Pacific Oceans are wind driven currents. There is a connection between the physics of these currents and the biological productivity in the ocean. For example, productivity is greatest in areas of equatorial and coastal upwelling as nutrient rich deep water is brought to the sunlit surface. 00:00 - Chapter 1. Ocean Currents 07:37 - Chapter 2. Wind Driven Currents 15:43 - Chapter 3. Transport of Water in Ocean Currents 18:49 - Chapter 4. Atlantic Ocean Circulation 28:06 - Chapter 5. Pacific Ocean Circulation 29:13 - Chapter 6. Southern Ocean Circulation 29:31 - Chapter 7. Arctic Ocean Circulation 31:45 - Chapter 8. Primary Productivity in the Ocean Complete course materials are available at the Open Yale Courses website: http://oyc.yale.edu This course was recorded in Fall 2011.

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