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Rev. biol. mar. oceanogr. 50(3): 603-609

Nota Científica


Caracterización de los flujos de CO2 y los parámetros asociados con el sistema de carbonato en el estuario Río Formoso, Brasil

Carlos Noriega1,2, Moacyr Araujo1,2, Manuel Flores Montes1 y Nathalie Lefèvre1,3

1Department of Oceanography (DOCEAN), Federal University of Pernambuco (UFPE), Av. Arquitetura s/n, Cidade Universitária, CEP: 50740-550, Recife, Brazil
2Center for Risk Analysis and Environmental Modeling (CEERMA), Federal University of Pernambuco (UFPE), Av. Arquitetura s/n, Cidade Universitária, CEP: 50740-550, Recife, Brazil
3LOCEAN Laboratory, IRD, CNRS, MNHN, Sorbonne Universités (UPMC, Univ Paris 06), 4 Place Jussieu, 75005 Paris, France

 emailButton carlos.delnor@gmail.com

 

Nine surface water surveys were performed in the Formoso estuary (Brazil) during 2012-2013 mainly in summer and winter periods and during spring tide. Temporal variations of temperature, salinity, phosphate, silicate, total alkalinity, dissolved inorganic carbon, partial pressure of CO2 (pCO2) and water-air CO2 fluxes were analyzed. Low rates of water-air CO2 fluxes (4.7 ± 8.0 mmol C m-2 d-1) were estimated despite the different climate conditions. pCO2 values ranged from 190 to 988 matm. These values are lower than those observed in other tropical estuaries. CO2 fluxes presented in this study contribute to the characterization of humid tropical estuarine systems, thus filling an important geographical information gap.

Key words:  CO2 fluxes, carbon cycle, tropical estuary, Brazil

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