Global Scale Winds.

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Presentation transcript:

Global Scale Winds

See also animation at http://www. suu

Columbus and Global Scale Winds Prevailing Westerlies

Global Scale Winds at the Surface in January

Surface Ocean Currents

Cross Section of Ocean Temperature and Circulation Surface Veneer and Dome of Warm Water North Atlantic Deep Water Antarctic Bottom Water

Upwelling and the Ekman Spiral Wind driven surface ocean currents move at 45° to the left of the wind in the South Hemisphere. With depth the current continues turning left and decreasing in speed. The net flow of water is 90° to the left of the wind. When winds parallel the coast, as against South America, colder water from the depths is forced to rise. This is called upwelling.

The Jet Stream often has two separate branches