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Auteur (up) Jose, Y.S.; Penven, P.; Aumont, O.; Machu, E.; Moloney, C.L.; Shillington, F.; Maury, O. url  doi
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  Titre Suppressing and enhancing effects of mesoscale dynamics on biological production in the Mozambique Channel Type Article scientifique
  Année 2016 Publication Revue Abrégée Journal of Marine Systems  
  Volume 158 Numéro Pages 129-139  
  Mots-Clés chlorophyll; Mesoscale dynamics; Mozambique Channel; primary production  
  Résumé 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.  
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  ISSN 0924-7963 ISBN Médium  
  Région Expédition Conférence  
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  Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 1516  
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