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We report partial pressure of CO2 (pCO2) and
ancillary data in three rivers (Bia, Tanoé, and Comoé) and
five lagoons (Tendo, Aby, Ebrié, Potou, and Grand-Lahou)
in Ivory Coast (West Africa), during four cruises covering
the main climatic seasons. The three rivers were oversaturated
in CO2 with respect to atmospheric equilibrium,
and the seasonal variability of pCO2 was due to dilution
during the flooding period. Surface waters of the Potou,
Ebrié, and Grand-Lahou lagoons were oversaturated in CO2
during all seasons. These lagoons behaved similarly to the
oligohaline regions of macrotidal estuaries that are CO2
sources to the atmosphere due to net ecosystem heterotrophy
and inputs of riverine CO2 rich waters. The Aby and
Tendo lagoons were undersaturated in CO2 with respect to
the atmosphere because of their permanent haline stratification
(unlike the other lagoons) that seemed to lead to
higher phytoplankton production and export of organic
carbon below the pycnocline. |
