Pagès Jean, Lemoalle Jacques. (1995). Distribution of carbon in a tropical hypersaline estuary, the Casamance (Senegal, West Africa). Estuaries, 18 (3), p. 456-468. ISSN 0160-8347.
Titre du document
Distribution of carbon in a tropical hypersaline estuary, the Casamance (Senegal, West Africa)
Année de publication
1995
Type de document
Article
Auteurs
Pagès Jean, Lemoalle Jacques
Source
Estuaries, 1995,
18 (3), p. 456-468 ISSN 0160-8347
The Casamance estuary, on the coast of Senegal, is an inverse hypersaline estuary : salinity increases landward, and dry season salinity values are up to 172 psu due to the evaporation of seawater. Dissolved inorganic carbon (DIC) concentrations decreased landward as a negative linear function of salinity. Thermodynamic modelling and the absence of CaCO3 in the sediments indicate that this loss of DIC was not due to calcite precipitation in the main water body. The intermost, almost landlocked, waters contained high phytoplankton biomass ... and high concentrations of allochthonous dissolved organic carbon. Photosynthetic uptake of DIC and subsequent particulate organic carbon sedimentation is proposed as hypothetical explanation of the relationship between DIC and salinity; localized overheating in shallow waters might also be involved. (D'après résumé d'auteur)
Plan de classement
Milieux physico-chimique [032MILPHY]
Descripteurs
ESTUAIRE ; GEOCHIMIE ; CARBONE ; DISTRIBUTION SPATIALE ; MILIEU HYPERHALIN
