L1 /
7
CH3041
IONIC CONTENT
• The salinity of the oceans is 35 (g kg-1).
• This means 35
g salts in 1 kg of water.
• 7 major
ions contain > 99% of the mass.
Na+ 42% Mg2+ 5% K+ 1% Ca2+ 1%
Cl- 49% SO42- 2.5% HCO3- 0.2%
Cl- 49% SO42- 2.5% HCO3- 0.2%
• The oceans of the world show little variability in ionic composition.
eg. Arctic to Black Sea K+ : Cl- 0.0205 (7)
eg. Arctic to Black Sea K+ : Cl- 0.0205 (7)
• Measurements
of salinity use conductivity (G) meters. (mS/cm or mmho/cm)
• The conductivity
between 2 plates is
related thru ionic strength I to salinity.
related thru ionic strength I to salinity.
