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PPT Slide
Sea water
Primary constituent ions in sea water total salinity = 34.342 parts per thousand = 34.482 PPT = 34.482 per mil = 34.482‰
Solute concentrations in sea water
Changes in sea water salinity
If sea water salinity has remained constant (oceans maintained a steady state), how is that accomplished?
What are the sources of the dissolved solids we see in the oceans?
Can river water be the source of the dissolved constituents in sea water?
Chemical constituents in river water Average river water salinity = 0.12‰ actual vs. (estimate of unpolluted value)
Most important dissolved constituents in sea water and river water Sea water River water
The total mass of dissolved solids added by rivers is great = ~4 x 109 tons, but cannot simply concentrate river water (by evaporation) & get sea water
What other processes add or subtract dissolved constituents to sea water?
Biological activity
Degassing of ocean
Formation of evaporites
Silicate clay flocculation
Hydrothermal vents at MOR (smokers), I
Hydrothermal vents at MOR (smokers), II
Email: steven.wojtal@oberlin.edu
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