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Dissolved inorganic carbon profiles and fluxes determined using pH and PCO2 microelectrodes Public Deposited

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https://ir.library.oregonstate.edu/concern/articles/tb09j7174

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Abstract
  • Submillimeter depth distributions of total dissolved inorganic carbon (DIC) were derived from pH and PCO2 profiles measured with microelectrodes in an organic-rich, laboratory-maintained sediment. The DTC profiles were used to calculate diffusive fluxes of DIC across the sediment-water interface. In two experiments, the calculated diffusive fluxes fell within ±50% of the total flux of DIC determined by core incubation. An assessment of errors suggests that the microelectrode-derived estimates are not significantly different from measured total DIC fluxes (P = 0.05). It is concluded, therefore, that pH and PCO2 microelectrode measurements can be paired to determine finescale pore-water DIC profiles and DIC diffusive fluxes. Problems will arise only in situations in which pH and PCO2 gradients are extremely steep or spatially heterogeneous; this is because these conditions can cause mismatching of pH and PCO2 measurements or CO2 system disequilibrium.
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Citation
  • Komada, Tomoko, Reimers, Glare E., Boehme, Susan E., ( 1998), Dissolved inorganic carbon profiles and fluxes determined using pH and microelectrodes. Limnology and Oceanography, 5, doi: 10.4319/lo.1998.43.5.0769.
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Journal Volume
  • 43
Journal Issue/Number
  • 5
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  • This work was supported by the National Science Foundation (grant OCE-9496066).
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  • 0024-3590

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