Noriega C. auteur aut IRD Araujo M. auteur aut IRD Montes M. F. auteur aut IRD Lefèvre Nathalie auteur aut IRD text journalArticle eng text/pdf reformatted digital access 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 (pCO(2)) 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. pCO(2) values ranged from 190 to 988 mu atm. 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. specialized CO2 fluxes carbon cycle tropical estuary Brazil BRESIL ATLANTIQUE FORMOSO COURS D'EAU 032 50 3 603-609 2015 0717-3326 https://www.documentation.ird.fr/hor/fdi:010065506 0717-3326 [F B010065506] https://www.documentation.ird.fr/hor/fdi:010065506 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers17-03/010065506.pdf IRD - Base Horizon / Pleins textes 2016-01-14 2017-08-23 fdi:010065506 fre