@article{fdi:010067233,
  title = {{C}omparing the results of a 4{D}-variational assimilation of satellite and in situ data with {WOCE} {CITHER} hydrographic measurements in the tropical {A}tlantic},
  author = {{G}reiner, {E}. and {A}rnault, {S}abine},
  editor = {},
  language = {{ENG}},
  abstract = {{TOPEX}/{POSEIDON} and {ERS}1 sea level anomalies, expendable bathythermograph temperature profiles, sea surface salinities and satellite sea surface temperatures have been assimilated from {N}ovember 1992 to {O}ctober 1994 into a non-linear primitive equation model of the tropical {A}tlantic {O}cean using a 4{D}-variational method. {T}he model is forced monthly by ship winds and climatologies of heat and fresh water fluxes. {T}he comparison between the model run both with and without assimilation is first analyzed in terms of empirical orthogonal functions, and along particular sections in the basin. {T}he results are then compared with independent hydrological measurements obtained during the {W}orld {O}cean {C}irculation {E}xperiment cruise {CITHER} 1, in the tropical {A}tlantic {O}cean in early 1993. {T}he comparison is improved globally with assimilation. {T}he largest impact or the assimilation appears in the {N}orth {E}quatorial {C}ounter {C}urrent and the {N}orth {E}quatorial {C}urrent (5 degrees {N}-15 degrees {N}). {S}ub-surface thermocline motions were not reproduced by the model alone, but, are, clearly depicted in the assimilation results along 7 degrees 30'{N} and are in good agreement with the {CITHER} {I} data. {C}onsiderations about the assimilation technique, the model and the forcing data sets are also discussed via this independent validation.},
  keywords = {{BRESIL} ; {CAP} {VERT} ; {ATLANTIQUE} ; {ZONE} {TROPICALE}},
  booktitle = {},
  journal = {{P}rogress in {O}ceanography},
  volume = {47},
  numero = {1},
  pages = {1--68},
  ISSN = {0079-6611},
  year = {2000},
  DOI = {10.1016/{S}0079-6611(00)00031-8},
  URL = {https://www.documentation.ird.fr/hor/fdi:010067233},
}