SALT IN THE OCEANS.

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Presentation transcript:

SALT IN THE OCEANS

Composition of sea water

Where do the salts come from? Weathering of rocks Na, Mg, Ca, K Underwater volcanic eruptions Cl, Br, S

Salinity Ratio of dissolved substance to the mass of water %= parts per hundred 0/00= parts per thousand Seawater averages 35 0/00

What can change salinity? Lowers salinity Precipitation Run-off Melting land or sea ice Raises salinity Evaporation Formation of sea ice

Glaciers Growing glaciers ________ salinity Melting glaciers ________ salinity

Salinity

Salinity map

Dead Sea Salinity 300 ppt No life forms

Great Salt Lake, Utah Salinity 12 ppt No fish Stinky brine shrimp Would you want to boat in this?

Deep ocean currents