Abstract
TRACER-CALIBRATED models of the total uptake of anthropogenic CO2 by the world's oceans give estimates of about 2 gigatonnes carbon per year1, significantly larger than a recent estimate2 of 0.3-0.8 Gt C yr-1 for the synoptic air-to-sea CO2 influx. Although both estimates require that the global CO2 budget must be balanced by a large unknown terrestrial sink, the latter estimate implies a much larger terrestrial sink, and challenges the ocean model calculations on which previous CO2 budgets were based. The discrepancy is due in part to the net flux of carbon to the ocean by rivers and rain, which must be added to the synoptic air-to-sea CO2 flux to obtain the total oceanic uptake of anthropogenic CO2. Here we estimate the magnitude of this correction and of several other recently proposed adjustments to the synoptic air-sea CO2 exchange. These combined adjustments minimize the apparent inconsistency, and restore estimates of the terrestrial sink to values implied by the modelled oceanic uptake.
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References
Houghton, J. T., Jenkins, G. J. & Ephraums, J. J. Climate Change, The IPCC Scientific Assessment (Cambridge University Press, 1990).
Tans, P. P., Fung, I. Y. & Takahashi, T. Science 247, 1431–1438 (1990).
Siegenthaler, U. & Oeschger, H. Tellus B39, 140–154 (1987).
Sarmiento, J. L., Siegenthaler, U. & Orr, J. C. J. geophys. Res. 97, 3621–3645 (1992).
Toggweiler, J. R., Dixon, K. & Bryan, K. J. geophys. Res. 94, 8243–8264 (1989).
Keeling, C. D., Piper, S. C. & Heimann, M. in Aspects of Climate Variability in the Pacific and the Western Americas, Geophys. Monogr. 55 (ed, Peterson, D. H.) 305–363 (American Geophysical Union, Washington DC, 1989).
Schluessel, P., Emery, W. J., Grassl, H. & Mammen, T. J. geophys. Res. 95, 13341–13356 (1990).
Smethie, W. M. Jr., Takahashi, T. & Chipman, D. W. J. geophys. Res. 90, 7007–7022 (1985)
Liss, P. & Merlivat, L. in The Role of Air-Sea Exchange in Geochemical Cycling (ed. Buat-Menard, P.) 113–127 (Reidel, Dordrecht, 1986).
Crutzen, P. J. & Gidel, L. T. J. geophys. Res. 88, 6641–6661 (1983).
Enting, I. G. & Mansbridge, J. V. Tellus B43, 156–170 (1991).
Sabine, C. L. & Mackenzie, F. T. Int. J. Energy Envir. Econ. 1, 119–127 (1991).
Wollast, R. & Mackenzie, F. T. Climate and Geosciences: A Challenge for Science and Society in the 21st Century, 453–473 (Kluwer, Dordrecht, 1989).
Maier-Reimer, E. & Hasslemann, K. Clim. Dynam. 2, 63–90 (1987).
Mackenzie, F. T. & Garrels, R. M. Am. J. Sci. 264, 507–525 (1966).
Gerlach, T. M. Eos 72, 249–255 (1991).
Berner, R. A. Am. J. Sci. 282, 451–473 (1982).
Romankevich, E. A. Geochemistry of Organic Matter in the Ocean (Springer, New York, 1984).
Burton, J. D. in SCOPE 21: The Major Biogeochemical Cycles and their Interactions (eds Bolin, B. & Cook, R. B.) 408–410 ((Wiley, New York, 1983).
Buat-Menard, P., Riley, J. P., Chester, R. & Duce, R. A. in Chemical Oceanography, vol. 10 (eds Riley, J. P., Chester, R. & Duce, R. A.) 251–279 (Academic, London, 1989).
Broecker, W. S. & Peng, T.-H. Tracers in the Sea (Eldigio, Palisades, New York, 1982).
Broecker, W. S. & Peng, T.-H. Nature 356, 587–589 (1992).
Berner, R. A., Lasaga, A. C. & Garrels, R. M. Am. J. Sci. 283, 641–683 (1983).
Berner, E. K. & Berner, R. A. The Global Water Cycle (Prentice-Hall, Englewood Cliffs, 1987).
Meybeck, M. Am. J. Sci. 287, 401–428 (1987).
Drever, J. I., Li, Y.-H. & Maynard, J. B. in Chemical Cycles in the Evolution of the Earth (eds Gregor, C. B. et al.) 17–53 (Wiley, New York, 1988).
Schlesinger, W. H. & Melack, J. M. Tellus 33, 172–187 (1981).
Meybeck, M. Flux of Organic Carbon by Rivers to the Oceans 219–269 (National Technical Information Service, Springfield, Virginia, 1981).
Milliman, J. D., Xie Quinchun & Yang Zuosheng Am. J. Sci. 284, 824–834 (1984).
Ittekkot, V. Nature 332, 436–438 (1988).
Meybeck, M. Physical and Chemical Weathering in Geochemical Cycles 247–272 (Kluwer, Dordrecht, 1988).
Spitzy, A. & Leenheer, J. in SCOPE: Biogeochemistry of Major World Rivers (eds Degens, E. T., Kempe, S. & Richey, J. E.) 213–232 (Wiley, New York, 1991).
Degens, E. T., Kempe, S. & Richey, J. E. in SCOPE 42: Biogeochemistry of Major World Rivers (eds Degens, E. T., Kempe, S. & Richey, J. E.) 323–347 (Wiley, New York, 1991).
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Sarmiento, J., Sundquist, E. Revised budget for the oceanic uptake of anthropogenic carbon dioxide. Nature 356, 589–593 (1992). https://doi.org/10.1038/356589a0
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DOI: https://doi.org/10.1038/356589a0
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