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Journal Article

Geochemical cycles in an ocean general circulation model. Preindustrial tracer distributions


Maier-Reimer,  Ernst
MPI for Meteorology, Max Planck Society;

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Maier-Reimer, E. (1993). Geochemical cycles in an ocean general circulation model. Preindustrial tracer distributions. Global Biogeochemical Cycles, 7, 645-677. doi:10.1029/93GB01355.

Cite as: https://hdl.handle.net/21.11116/0000-000C-320B-0
A state-of-the-art report is given of the Hamburg model of the oceanic carbon cycle. The model advects geochemical tracers important to the carbon cycle by the currents of a general circulation model. The geochemical cycling is driven by a Michaelis - Menten type production kinetics. The model is an extension of the Bacastow and Maier-Reimer (1990) model. It is based-on-a more realistic current field and includes a mechanism of lysocline - sediment interaction. Principal variables are SIGMACO2, alkalinity. phosphate, oxygen, and silicate. The carbon variables are defined for C-12, C-13, and C-14 separately. In addition to these carbon isotopes, 39A and deltaO-18 of dissolved oxygen are predicted. The model predicts realistic global patterns of tracer distribution. In the equatorial eastern Pacific, however, the structures are exaggerated due to a strong upwelling which is a common feature of coarse resolution models of the general circulation of the ocean.