OCE CHEM

OCE CHEM - CFC along the 52 degree west longitude line in...

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Forchhammer’s principle – although total amount of salts in seawater may change the ratios of major salts remains constant. One implication is that the ocean is in chemical equilibrium. Amount in equals Amount out Residence time = amount of element in the ocean rate of addition (or removal) Cl - = 100,000,000 years Water = 4100 years Fe = 200 years
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Mixing time = 1600 years Mixing is the result of circulation by ocean currents. Mixing time was calculated using chemical tracers. Chlorofluorocarbons (CFC’s) Tritium Other radionuclides (U, Th, Ce) Data from WOCE project showing distribution of
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Unformatted text preview: CFC along the 52 degree west longitude line in the North Atlantic Ocean Dissolved gasses – DO, CO 2 , N 2 (N only important as NO 3-or NH 3-) pH = -log[H+] e.g. if concentration is10-1 , pH = 1 Acid Base balance and the global carbon cycle (buffer) CO 2(g) + H 2 (l) H 2 CO 3(aq) HCO 3-(aq) +H + CO 3 2-(aq) + 2H + atmosphere Ocean Respiration and photosynthesis Organisms combine CO 3 2-and Ca 2+ to form limestone (CaCO 3 ) which is stored in the sediment Carbonate sediment Distribution Red = 100% Violet = 0%...
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