Budget of organic carbon in the North-Western Mediterranean open sea over the period 2004–2008 using 3-D coupled physical-biogeochemical modeling
Ulses, C.; Auger, P.-A.; Soetaert, K.; Marsaleix, P.; Diaz, F.; Coppola, L.; Herrmann, M.J.; Kessouri, F.; Estournel, C. (2016). Budget of organic carbon in the North-Western Mediterranean open sea over the period 2004–2008 using 3-D coupled physical-biogeochemical modeling. JGR: Oceans 121(9): 7026–7055. https://dx.doi.org/10.1002/2016JC011818
In: Journal of Geophysical Research-Oceans. AMER GEOPHYSICAL UNION: Washington. ISSN 2169-9275; e-ISSN 2169-9291, more
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| Authors | | Top |
- Ulses, C.
- Auger, P.-A.
- Soetaert, K., more
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- Marsaleix, P.
- Diaz, F.
- Coppola, L.
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- Herrmann, M.J.
- Kessouri, F.
- Estournel, C.
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| Abstract |
A 3-D hydrodynamic-biogeochemical coupled model has been used to estimate a budget oforganic carbon and its interannual variability over the 5 year period 2004–2008 in the North-Western Medi-terranean Open Sea (NWMOS). The comparison of its results with in situ and satellite observations revealsthat the timing and the magnitude of the convection and bloom processes during the study period, markedby contrasted atmospheric conditions, are reasonably well reproduced by the model. Model outputs showthat the amount of nutrients annually injected into the surface layer is clearly linked to the intensity of theevents of winter convection. During cold winters, primary production is reduced by intense mixing eventsbut then spectacularly increases when the water column restratifies. In contrast, during mild winters, the pri-mary production progressively and continuously increases, sustained by moderate new production followedby regenerated production. Overall, interannual variability in the annual primary production is low. Theexport in subsurface and at middepth is however affected by the intensity of the convection process, withannual values twice as high during cold winters than during mild winters. Finally, the estimation of a globalbudget of organic carbon reveals that the NWMOS acts as a sink for the shallower areas and as a source forthe Algerian and Balearic subbasins |
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