Jose Y. S. auteur aut IRD Penven Pierrick auteur aut IRD Aumont Olivier auteur aut IRD Machu Eric auteur aut IRD Moloney C. L. auteur aut IRD Shillington F. auteur aut IRD Maury Olivier auteur aut IRD text journalArticle eng text/pdf born digital access We used a coupled physical-biogeochemical model to investigate how the strong eddy activity typical of the Mozambique Channel affects biological production. A numerical experiment was carried out, in which mesoscale dynamics were suppressed by cancelling the nonlinear terms for horizontal momentum in the Naviers-Stokes equation. Mesoscale dynamics were found to be responsible for (1) increased offshore production in the Mozambique Channel as a result of net eddy-induced offshore transport of nutrient-rich coastal waters; (2) decreased shelf production along the central Mozambican and south-west Madagascar coast caused by a reduction in nutrient availability related to the net eddy-induced lateral transport of nutrients; (3) increased coastal production along the northern Mozambican coast caused by eddy-induced nutrient supply. The model results also showed an intensification and shallowing of the subsurface production, related to increased upper layer nutrient concentrations caused by eddy activity. In addition, by driving the detachment of the East Madagascar Current at the southern tip of the island, inertial processes intensify the southern Madagascar upwelling and causes offshore diffusion of the upwelled waters. These results emphasize the complex role played by eddy activity and, more generally, inertial processes on marine ecosystems in this region. specialized Mesoscale dynamics Chlorophyll Primary production Mozambique Channel MADAGASCAR MOZAMBIQUE CANAL 032 036 158 129-139 2016 0924-7963 https://www.documentation.ird.fr/hor/fdi:010066810 10.1016/j.jmarsys.2016.02.003 0924-7963 [F B010066810] https://www.documentation.ird.fr/hor/fdi:010066810 https://www.documentation.ird.fr/intranet/publi/2016/05/010066810.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2016-06-02 2017-08-23 fdi:010066810 fre