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      Fractionation of carbon isotopes by phytoplankton and estimates of ancient CO2levels

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      Global Biogeochemical Cycles
      American Geophysical Union (AGU)

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          Observational contrains on the global atmospheric co2 budget.

          Observed atmospheric concentrations of CO(2) and data on the partial pressures of CO(2) in surface ocean waters are combined to identify globally significant sources and sinks of CO(2). The atmospheric data are compared with boundary layer concentrations calculated with the transport fields generated by a general circulation model (GCM) for specified source-sink distributions. In the model the observed north-south atmospheric concentration gradient can be maintained only if sinks for CO(2) are greater in the Northern than in the Southern Hemisphere. The observed differences between the partial pressure of CO(2) in the surface waters of the Northern Hemisphere and the atmosphere are too small for the oceans to be the major sink of fossil fuel CO(2). Therefore, a large amount of the CO(2) is apparently absorbed on the continents by terrestrial ecosystems.
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            The distribution of 13C of ΣCO2 in the world oceans

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              Vertical distribution and isotopic fractionation of living planktonic foraminifera from the Panama Basin

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                Author and article information

                Journal
                Global Biogeochemical Cycles
                Global Biogeochem. Cycles
                American Geophysical Union (AGU)
                08866236
                June 1992
                June 1992
                : 6
                : 2
                : 185-198
                Article
                10.1029/92GB00190
                11537848
                3a016428-425c-4bbc-bf40-b999b7eb2a9f
                © 1992

                http://doi.wiley.com/10.1002/tdm_license_1.1

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