@article{fdi:010069237,
  title = {{V}ariability of f{CO}(2) in the {E}astern {T}ropical {A}tlantic from a moored buoy},
  author = {{L}ef{\`e}vre, {N}athalie and {G}uillot, {A}. and {B}eaumont, {L}. and {D}anguy, {T}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A} f{CO}(2) sensor, based on a colorimetric method used for the {CARIOCA} buoys, has been installed on a {P}ilot {R}esearch {M}oored {A}rray in the {T}ropical {A}tlantic ({PIRATA}) mooring at 6 degrees {S}, 10 degrees {W}, in the gulf of {G}uinea, in {J}une 2006 during the {EGEE} 3 cruise. {H}ourly f{CO}(2) data recorded from {J}une to {D}ecember 2006 are presented. {A}n alkalinitysalinity relationship has been determined using data from different cruises, which allows the calculation of dissolved inorganic carbon. {A}lthough the tropical {A}tlantic is an important source of {CO}2, an unexpected area of low {CO}2 concentrations is observed in the {S}outh {E}quatorial {C}ounter {C}urrent with f{CO}(2) values close to equilibrium conditions or even slightly undersaturated with respect to the atmospheric f{CO}(2) value of 367.7 mu atm measured during the cruise. {A}t the end of {J}une, an increase of seawater f{CO}(2) to 400 mu atm is consistent with the beginning of the upwelling season occurring from {J}uly to {S}eptember. {A}lthough the mooring is not located within the upwelling area, the spreading of the cold tongue explains the large {CO}2 outgassing. {T}he monthly {CO}2 flux ranges from 1.19 mmol m(-2) d(-1) in {J}une to a maximum of 8.37 mmol m(-2) d(-1) in {O}ctober, when high f{CO}(2) values above 420 matm are maintained by the warming of surface water. {M}ost of the f{CO}(2) distribution can be explained by physical processes and a strong relationship between f{CO}(2) and {SST} is determined for the upwelling season. {F}rom mid-{S}eptember, diurnal cycles can be detected. {U}sing a dissolved inorganic carbon budget, periods where net community production or diurnal warming and cooling dominates are observed.},
  keywords = {},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch {O}ceans},
  volume = {113},
  numero = {{C}1},
  pages = {art. no. {C}01015},
  ISSN = {0148-0227},
  year = {2008},
  DOI = {10.1029/2007{JC}004146},
  URL = {https://www.documentation.ird.fr/hor/fdi:010069237},
}