Lecture 14

Lecture 14 - shallow, wide, slow GRAVITY BALANCES CORIOLIS...

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Lecture 14: Surface Ocean Circulation Prevailing winds drive movement of surface ocean water forming wind-drift currents
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Driving Forces of Surface Ocean Circulation Prevailing winds make waves and wind-drift currents Coriolis force causes currents to deflect clockwise (northern hemisphere) or counter-clockwise (southern hemisphere) and develop Ekman spirals Continental margins deflect and guide currents
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Major Surface Wind Patterns
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Deflection of Surface Water Flow
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Coriolis Effect -> Ekman Transport (Latitudinal effect due to rotation)
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Deflection in the Northern Hemisphere
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Boundary effects on surface ocean circulation:
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Western Boundary Currents - deep, narrow, fast
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Eastern Boundary Currents -
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Unformatted text preview: shallow, wide, slow GRAVITY BALANCES CORIOLIS EFFECT Generalized Topography of Ocean Gyres Major Wind Driven Gyres QuickTime and a TIFF (Uncompressed) decompressor are needed to see this picture. 2 1 3 4 5 Surface Ocean Currents and Upwelling Boundary currents and offshore coastal winds create local coastal upwelling Large-scale upwelling is associated with Equatorial Currents Large-scale upwelling is associated with divergence of currents running past one another Coastal upwelling And downwelling. (Later we will see that upwelling brings nutrients (food) to the ocean surface.) Upwelling due to divergence of currents flowing past one another....
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This note was uploaded on 05/08/2009 for the course GEOL 150Lxg taught by Professor Stott during the Spring '07 term at USC.

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Lecture 14 - shallow, wide, slow GRAVITY BALANCES CORIOLIS...

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