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

http://ir.library.oregonstate.edu/concern/defaults/tb09j7174

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  • 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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  • Limnol. Oceanogr. 43, 769-781
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  • description.provenance : Approved for entry into archive by Linda Lamb(llamb@coas.oregonstate.edu) on 2009-11-23T18:40:52Z (GMT) No. of bitstreams: 1 LimnolOceanogr 1998 43 769-781.pdf: 1825077 bytes, checksum: eed8a4bbb751e163e61a08c8876a35a2 (MD5)
  • description.provenance : Made available in DSpace on 2009-11-23T18:40:52Z (GMT). No. of bitstreams: 1 LimnolOceanogr 1998 43 769-781.pdf: 1825077 bytes, checksum: eed8a4bbb751e163e61a08c8876a35a2 (MD5) Previous issue date: 1998
  • description.provenance : Submitted by Linda Lamb (llamb@coas.oregonstate.edu) on 2009-11-23T18:03:25Z No. of bitstreams: 1 LimnolOceanogr 1998 43 769-781.pdf: 1825077 bytes, checksum: eed8a4bbb751e163e61a08c8876a35a2 (MD5)
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  • 0024-3590

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