GEOL107_10

GEOL107_10 - Geol 107 L10 9/14/11 Vertical Mixing in the...

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Geol 107 L10 9/14/11 1 Temperature, salinity & density in the Oceans Why? Because it drives Ocean Stratification, Upwelling and Downwelling Vertical Mixing in the Ocean • Upwelling – the vertical movement of water from depth moving up toward the surface. • Downwelling – the vertical movement of water from the surface, moving down (sinking) Vertical Mixing in the Ocean • Vertical mixing in the ocean is like a conveyor belt • downwelling in one area • upwelling in another • but most of the time it travels sideways • Why does it sink/upwell? – changes in density Seawater Density Temperature + Salinity Seawater Density Temperature + Salinity Seawater Density Temperature + Salinity
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Geol 107 L10 9/14/11 2 SURFACE Seawater Density Temperature + Salinity Salinity Temperature Density Change Mechanisms: Temperature Recall water’s density changes with temperature Density Change Mechanisms: Salinity • Add Fresh Water, salinity drops •Evaporate, salinity rises
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This note was uploaded on 10/11/2011 for the course GEOL 107Lxg at USC.

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GEOL107_10 - Geol 107 L10 9/14/11 Vertical Mixing in the...

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