The seasonal cycle of surface chlorophyll along the peruvian coast: Comparison between seawifs satellite observations and dynamical/biogeochemical coupled model simulations

• Vincent Echevin ^[1] ; Olivier Aumont ^[1] ; Jorge Tam ^[2] ; Jose Pasapera ^[2]
  1. [1] Pierre and Marie Curie University

     Pierre and Marie Curie University

     París, Francia

     
  2. [2] Peruvian Marine Research Institute (IMARPE) Research Center for Oceanographic and Biological Fishery Modelling (CIMOBP)
• Localización: Gayana, ISSN-e 0717-6538, ISSN 0717-652X, Vol. 68, Nº. 2, 2004, págs. 325-326
• Idioma: inglés
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• Resumen

  • The seasonal cycle of surface chlorophyll along the Peruvian coasts is studied with SeaWiFS satellite observations and coupled dynamical/biogeochemical ORCA/PISCES model simulations. The observed mean spatial structure of surface chlorophyll is shown to be in good agreement with that of the model. However the seasonal cycles contrast: whereas the model produces a spring bloom consistent with maximum upwelling and deepest mixed layer in the winter season, the observed seasonal cycle shows two distinct blooms one in late spring-early summer and other in fall. Several hypotheses are suggested to explain the fall bloom and its non-occurrence in the model