Predicted shift in the C-13/C-12 ratio of atmospheric carbon dioxide

Details Predicted shift in the C-13/C-12 ratio of atmospheric carbon dioxide Predicted shift in the C-13/C-12 ratio of atmospheric carbon dioxide

Jul 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980georl...7..505k&link_type=abstract

Geophysical Research Letters, vol. 7, July 1980, p. 505-508. Research supported by the U.S. Department of Energy and NOAA

Computer Science

Performance

13

Abundance, Air Pollution, Air Water Interactions, Atmospheric Composition, Carbon Dioxide Concentration, Isotope Effect, Lower Atmosphere, Biosphere, Carbon 13, Exhaust Emission, Isotope Separation, Performance Prediction

Scientific paper

Knowledge of recent global changes in the rare isotopic species (C-13)O2 in atmospheric carbon dioxide does not now distinguish whether the land biosphere is a source or sink for fossil fuel carbon dioxide. The question is critically dependent on isotopic fractionation between the atmosphere and ocean water; if the isotopic fractionation factor for CO2 uptake at the air-ocean boundary, alpha(am), is approximately 0.986, as is the case for strongly alkaline solutions, the (C-13)O2 content of atmospheric CO2 is insensitive to changes in the biosphere; if alpha(am) is approximately unity, as now seems likely for ocean water, very accurate measurements, over the next decade or longer, will permit an estimation to be made of the net global loss or gain of biospheric carbon.

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