@article{PAR00003857,
  title = {{S}easonal variability of the {E}quatorial {U}ndercurrent at 10 degrees {W} as inferred from recent in situ observations},
  author = {{K}olodziejczyk, {N}. and {B}ourl{\`e}s, {B}ernard and {M}arin, {F}r{\'e}d{\'e}ric and {G}relet, {J}acques and {C}huchla, {R}{\'e}mi},
  editor = {},
  language = {{ENG}},
  abstract = {{E}ighteen cross-equatorial shipboard current profiling sections along 10 degrees {W} with conductivity-temperature-depth measurements taken between 1997 and 2007 are used to analyze the mean meridional structure and the seasonal variability of the {E}quatorial {U}ndercurrent ({EUC}) at 10 degrees {W}. {O}ur analysis suggests a seasonal cycle for the {EUC} transport at 10 degrees {W}, with a well-defined annual harmonic and some indication of a semiannual component, with a first maximum in {J}anuary and a second stronger maximum from {J}une to {S}eptember. {T}he mean {EUC} transport at 10 degrees {W} is estimated to be 12.1 {S}v and, compared to earlier estimates farther in the west, at 35 degrees {W} (20.9 {S}v) and 26 degrees {W} (13.8 {S}v). {T}he eastward flow transport exhibits a strong variability at 10 degrees {W} (with a total range of transports from 7.1 {S}v to more than 31.7 {S}v). {T}he seasonal amplitude of the eastward flow variability is +/- 8.9 {S}v, from a minimum of 8.2 {S}v in {N}ovember to 25.9 {S}v in {A}ugust. {T}he eastward flows within the thermocline are divided in two parts: a permanent part within the sigma(theta) = 24.5-26.5 isopycnal layer, with a semiannual cycle, known as the {EUC}, and a nonpermanent part in the deep thermocline (beneath sigma(theta) = 26.5 isopycnal), associated with a strong eastward transport (up to 15 {S}v) during the boreal summer, that is not observed during the rest of the year. {T}he current at the equator in the deep thermocline is even westward during boreal fall. {T}he disappearance of the salinity core of the {EUC} during the boreal summer, associated with the upwelling of the hydrological structure at 10 degrees {W}, reveals that the saline subtropical waters carried by the {EUC} within the thermocline no longer flow into the {G}ulf of {G}uinea during the boreal summer. {O}ur data also show the presence of the {S}outh {E}quatorial {U}ndercurrent ({SEUC}) at 10 degrees {W} in the {G}ulf of {G}uinea with a strong latitudinal and depth variability throughout the year. {T}he mean {SEUC} at 10 degrees {W} is centered near 5 degrees {S} and is farther south than observed at 35 degrees {W} and 26 degrees {W}, suggesting its poleward shift from west to east.},
  keywords = {{GUINEE} {GOLFE}},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch - {O}ceans},
  volume = {114},
  numero = {},
  pages = {{C}06014},
  ISSN = {0148-0227},
  year = {2009},
  DOI = {10.1029/2008jc004976},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00003857},
}