Skip to content. | Skip to navigation

Laboratoire d’Etudes en Géophysique et Océanographie Spatiales

Personal tools

This is SunRain Plone Theme


You are here: Home / Research teams / Research / SYSCO2 / _Abstracts / charria_2003


by zopeadm — last modified Jan 05, 2011 02:03 PM

Rossby wave and ocean color: The cells uplifting hypothesis in the South Atlantic Subtropical Convergence Zone,

Charria, G., Melin, F., Dadou, I., Radenac M-H, and Garçon, V.,

Geophysical Research Letters, 30, 3, 1125, doi:10.1029/2002GL016390.



Rossby waves signatures on filtered ocean color data are detected in the subtropical convergence zone of the South Atlantic ocean. We investigate whether these chlorophyll anomalies can be accounted for by the uplifting mechanism of phytoplanktonic cells associated with the passage of a Rossby wave. We consider vertical chlorophyll profiles exhibiting a subsurface chlorophyll maximum typical of the South Atlantic Subtropical Convergence Province. Chlorophyll remotely-sensed concentrations resulting from an academic uplifting of the three chlorophyll profiles are reconstructed with a radiative transfer model. Amplitude of the chlorophyll enrichments found with this hypothesis (0.06 mg chl/m³) compares well with propagative ocean color anomalies detected in the SeaWiFS data. However, other processes such as the Rototiller effect [Siegel, 2001] or advection of chlorophyll gradients could also play a non negligible role.



-> Retour à la liste des publications

Document Actions