Publications des scientifiques de l'IRD

Parard G., Lefèvre Nathalie, Boutin J. (2010). Sea water fugacity of CO2 at the PIRATA mooring at 6 degrees S, 10 degrees W. Tellus Series B. Chemical and Physical Meteorology, 62 (5), p. 636-648. ISSN 0280-6509.

Titre du document
Sea water fugacity of CO2 at the PIRATA mooring at 6 degrees S, 10 degrees W
Année de publication
2010
Type de document
Article référencé dans le Web of Science WOS:000283167300025
Auteurs
Parard G., Lefèvre Nathalie, Boutin J.
Source
Tellus Series B. Chemical and Physical Meteorology, 2010, 62 (5), p. 636-648 ISSN 0280-6509
In order to better understand the variability of surface CO2 in the Tropical Atlantic, a CARIOCA sensor has been installed on a PIRATA mooring at 6 degrees S, 10 degrees W in June 2006. The fugacity of CO2 (fCO(2)) is recorded hourly from 7 June 2006 to 30 October 2009 with two important data gaps. From July to September, an upwelling develops and a decrease in sea surface temperature (SST) is observed, associated with an fCO(2) increase. However, the highest fCO(2) is observed in October, after the upwelling season, due to the warming of surface waters. The region is a net source of CO2 to the atmosphere of 2.10 +/- 0.69 mol m-2 yr-1 in 2007. The monthly flux is maximum (3.21 +/- 0.8 mol m-2 yr-1) in November (averaged over 2006 and 2008). High frequency variability is observed throughout the time series but is particularly pronounced after the upwelling season. Biological and thermodynamic processes explain the diurnal variability. Dissolved inorganic carbon (DIC) is calculated from (alkalinity) TA and fCO(2) using an empirical TA-salinity relationship determined for the eastern equatorial Atlantic. Net community production (NCP) is calculated from DIC daily changes and ranges from 9 to 41 mmol m-2 d-1, which is consistent with previous measurements in this region.
Plan de classement
Limnologie physique / Océanographie physique [032]
Localisation
Fonds IRD [F B010052862]
Identifiant IRD
fdi:010052862
Contact