Abstract
To evaluate the contribution of biogeochemical processes to the oceanic carbon cycle and to calculate the ratio of calcium carbonate to organic carbon downward export, we have incorporated biological and alkalinity pumps in the yoked high-latitude exchange/interior diffusion-advection (YOLDA) model. The biogeochemical processes are represented by four parameters. The values of the parameters are tuned so that the model can reproduce the observed phosphate and alkalinity distributions in each oceanic region. The sensitivity of the model to the biogeochemical parameters shows that biological production rates in the euphotic zone and decomposition depths of particulate matters significantly influence horizontal and vertical distributions of biogeochemical substances. The modeled vertical fluxes of particulate organic phosphorus and calcium carbonate are converted to vertical carbon fluxes by the biological pump and the alkalinity pump, respectively. The downward carbon flux from the surface layer to the deep layer in the entire region is estimated to be 3.36 PgC/yr, which consists of 2.93 PgC/yr from the biological pump and 0.43 PgC/yr from the alkalinity pump, which is consistent with previous studies. The modeled rain ratio is higher with depth and higher in the Pacific and Indian Oceans than in the Atlantic Ocean. The global rain ratio at the surface layer is calculated to be 0.14 to 0.15. This value lies between the lower and higher ends of the previous estimates, which range widely from 0.05 to 0.25. This study indicates that the rain ratio is unlikely to be higher than 0.15, at least in the surface waters.
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Archer, D., D. Lea and N. Mahowald (2000): What caused the glacial/interglacial atmospheric pCO2 cycles? Rev. Geophys., 38, 159–189.
Aumont, O. (1998): Etude du cycle naturel du carbone dans un modele 3D de l'ocean mondial. Doctrat thesis, Univite Paris VI.
Bacastow, R. and E. Maier-Reimer (1990): Ocean-circulation model of the carbon cycle. Clim. Dyn., 4, 95–125.
Betzer, P. R., W. J. Showers, E. A. Laws, C. D. Winn, G. R. DiTullio and P. M. Kroopnick (1984): Primary productivity and particle fluxes on a transect of the equator at 153°W in the Pacific Ocean. Deep-Sea Res., 31, 1–11.
Broecker, W. S. (1971): Calcite accumulation rates and glacial to interglacial changes in oceanic mixing. p. 239–265. In The Late Cenozic Glacial Ages, ed. by K. K. Turekian, Yale Univ. Press, New Haven, Conn.
Broecker, W. S. and T.-H. Peng (1982): Tracers in the Sea. Lamont-Doherty Geol. Obs., Palisades, New York, 690 pp.
Brown, C. W. and J. A. Yoder (1994): Coccolithophorid blooms in the global ocean. J. Geophys. Res., 99, 7467–7482.
Buesseler, K. O. (1991): Do upper-ocean sediment traps provide an accurate record of particle flux? Nature, 353, 4420–4423.
Chen, C. T. and R. M. Pytkowitz (1979): On the total CO2-titration alkalinity-oxygen system in the Pacific Ocean. Nature, 281, 362–365.
Conkright, M. E., S. Levitus, T. O'Brien, T. P. Boyer, C. Stephens, D. Johnson, L. Stathoplos, O. Baranova, J. Antonov, R. Gelfeld, J. Burney, J. Rochester and C. Forgy (1998): World Ocean Database 1998 CD-ROM Data Set Documentation. National Oceanographic Data Center, Silver Spring, MD.
Fujii, M., M. Ikeda and Y. Yamanaka (2000): Roles of physical processes in the carbon cycle using a simplified physical model. J. Oceanogr., 56, 655–666.
Honjo, S. (1996): Fluxes of particles to the interior of the open oceans. p. 91–154. In Particle Flux in the Ocean, ed. by V. Ittekkot et al., John Wiley, New York.
Iglesias-Rodirguez, M. D., C. Brown, S. C. Doney, J. Kleypas, D. Kolber, Z. Kolber, P. K. Hayes and P. G. Falkowski (2002): Representing key phytoplankton functional groups in ocean carbon cycle models: Coccolithophores. Global Biogeochem. Cycles, 16, doi:10.1029/001GB001454.
International Panel on Climate Change (2001): Climate Change 2001: The Scientific Basis, ed. by J. T. Houghton, Y. Ding, D. J. Griggs, M. Mouguer, P. J. van der Linden, X. Dai, K. Maskell and C. A. Johnson, Cambridge Univ. Press, Cambridge, U.K., 881 pp.
Lee, K. (2001): Global net community production estimated from the annual cycle of surface water total dissolved inorganic carbon. Limnol. Oceanogr., 46, 1287–1297.
Li, Y. H., T. Takahashi and W. S. Broecker (1969): Degree of saturation of CaCO3 in the oceans. J. Geophys. Res., 74, 5507–5525.
Maier-Reimer, E. (1993): Geochemical cycles in an ocean general circulation model, Preindustrial tracer distributions. Global Biogeochem. Cycles, 7, 645–677.
Martin, J. H., G. A. Knauer, D. M. Karl and W. W. Broenkow (1987): VERTEX: carbon cycling in the northeast Pacific. Deep-Sea Res., 34, 267–285.
Mehrbach, C., C. H. Culberson, J. E. Hawley and R. M. Pytkowicz (1973): Measurement of the apparent dissociation constants of carbonic acid in seawater at atmospheric pressure. Limnol. Oceanogr., 18, 897–906.
Milliman, J. D., P. J. Troy, W. M. Balch, A. K. Adams, Y.-H. Li and F. T. MacKenzie (1999): Biologically mediated dissolution of calcium carbonate above the chemical lysocline? Deep-Sea Res. Part I, 46, 1653–1669.
Murnane, R., J. L. Sarmiento and C. L. Quere (1999): Spatial distribution of air-sea CO2 fluxes and the interhemispheric transport of carbon by the oceans. Global Biogeochem. Cycles, 13, 287–305.
Najjar, R. G. and J. C. Orr (1998): Design of OCMIP-2 simulations of chlorofluorocarbons, the solubility pump and common biogeochemistry. 19 pp.
Packard, T. T., M. Denis, M. Rodier and P. Garfield (1988): Deep ocean metabolic CO2 production: Calculations from ETS activity. Deep-Sea Res., 35, 371–382.
Redfield, A. C., B. H. Ketchum and F. A. Richards (1963): The influence of organisms on the composition of sea-water. p. 26–77. In The Sea, Vol. 2, ed. by M. N. Hill, Interscience, New York.
Sarmiento, J. L., P. Monfray, E. Maier-Reimer, O. Aumont, R. Murnane and J. Orr (2000): Air-sea CO2 fluxes and carbon transport: A comparison of three ocean general circulation models. Global Biogeochem. Cycles, 14, 1267–1281.
Sarmiento, J. L., J. Dunne, A. Gnanadesikan, R. M. Key, K. Matsumoto and R. Slater (2002): A new estimate of the CaCO3 to organic carbon export ratio. Global Biogeochem. Cycles, 16, 1107, doi: 10.1029/2002GB001919.
Shaffer, G. (1989): A model of biogeochemical cycling of phosphorus, nitrogen, oxygen, and sulphur in the ocean: One step toward a global climate model. J. Geophys. Res., 94, 1979–2004.
Shaffer, G. (1996): Biogeochemical cycling in the global ocean, 2. New production, Redfield ratios, and remineralization in the organic pump. J. Geophys. Res., 101, 3723–3745.
Tsunogai, S. and S. Noriki (1991): Particulate fluxes of carbonate and organic carbon in the ocean. Is the marine biological activity working as a sink of the atmospheric carbon?, Tellus, 43B, 256–266.
Volk, T. and M. I. Hoffert (1985): Ocean carbon pumps: Analysis of relative strengths and efficiencies in ocean-driven atmospheric CO2 changes. p. 99–110. In The Carbon Cycle and Atmospheric CO 2 : Natural Variations Archean to Present, ed. by E. T. Sundquest and W. S. Broecker, Geophys. Monogr. Ser., 32, AGU, Washington, D.C.
Weiss, R. F. (1974): Carbon dioxide in water and seawater: The solubility of a non-ideal gas. Mar. Chem., 2, 203–215.
Yamanaka, Y. and E. Tajika (1996): The role of the vertical fluxes of particulate organic matter and calcite in the oceanic carbon cycle: Studies using an ocean biogeochemical general circulation model. Global Biogeochem. Cycles, 10, 361–382.
Yamanaka, Y. and E. Tajika (1997): Role of dissolved organic matter in the marine biogeochemical cycle: Studies using an ocean biogeochemical general circulation model. Global Biogeochem. Cycles, 11, 599–612.
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Fujii, M., Ikeda, M. & Yamanaka, Y. Roles of Biogeochemical Processes in the Oceanic Carbon Cycle Described with a Simple Coupled Physical-Biogeochemical Model. J Oceanogr 61, 803–815 (2005). https://doi.org/10.1007/s10872-006-0001-6
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DOI: https://doi.org/10.1007/s10872-006-0001-6