(NAS Colloquium) Carbon Dioxide and Climate Change (1997) / Chapter Skim
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Pages 36-41
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From page 36... ...
methods involve a simple arithmetic subtraction of the quantities of CO2 gas and alkalinity added to deep waters by respiration and carbonate dissolution once the surface waters are removed from their contact with the atmosphere and begin their century scale sojourn in the abyss. However the two approaches differ importantly in their normalization procedures and in the assumptions necessary to formalize the signal.
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From page 37... ...
Thus in the deep ocean the addition of CO2 by respiration can be calculated by observing the oxygen deficit relative to
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From page 38... ...
, and thus all corrections reduce to a function of the oxygen deficit of the water mass. To establish the deep water correction terms for total CO2, we therefore write i\TC = 106/1387\O2 + 0.5~1\TA - t(1 - 18~/138 ~O23)
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From page 39... ...
However, this represents the chemical state of the surface ocean at the time of the observations. The deep waters are formed in late winter at some Pre pCO2 Using Goyet & Poisson Constants vs.
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From page 40... ...
In doing so we expose a weakness in our understanding, for although the preindustrial atmosphere and the ocean must have been in gross overall equilibrium, regional disequilibrium in the pCO2 of the deep water at the time of formation is clearly possible. Takahashi et al.
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From page 41... ...
(1995) Monitoring Global Ocean Carbon Inventories, Ocean Observing System Background Report 5 (Texas A&M Univ., College Station)
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