@inproceedings{fdi:30217,
  title = {{S}urface equatorial flow anomalies in the {P}acific ocean during the 1986-87 {ENSO} using {GEOSAT} altimeter data},
  author = {{P}icaut, {J}o{\¨e}l and {C}amusat, {B}runo and {D}elcroix, {T}hierry and {M}c{P}haden, {M}.{J}. and {B}usalacchi, {A}.{J}.},
  editor = {},
  language = {{ENG}},
  abstract = {{E}stimates of surface geostrophic zonal flow in the equatorial {P}acific are deduced from the 17-day exact repeat orbit {GEOSAT} measurements for the period november 1986-november 1987. {T}his period coincides with the height of the 1986-87 {ENSO}. {A}long-track altimeter height anomalies are first smoothed using a combination of linear and non linear filters. {B}y combining several tracks in the zonal direction and filtering in time, we are able to obtain low frequency sea surface height at any point of the tropical {P}acific. {C}urrents are calculated from the differentiated form of the meridional momentum equation at the equator and from the classical first derivative of the meridional pressure field away from the equator. {C}omparisons of low frequency near-surface zonal current directly measured from equatorial moorings at 165°{E}, 140°{W} and 110°{W} yield a correlation of 0.83, 0.84 and 0.50 respectively with a mean rms difference of 0.23 m.s-1. {S}ea level and zonal velocity solutions from a tropical {P}acific numerical model are used as proxy data sets in order to quantify errors induced to quantify the geostrophic calculation by the {GEOSAT} space-time sampling.},
  keywords = {{SURFACE} {MARINE} ; {COURANT} {GEOSTROPHIQUE} ; {ANOMALIE} ; {SATELLITE} {GEOSAT} ; {ENSO} ; 1986 1987 ; {PACIFIQUE} {EQUATORIAL} {OUEST}},
  numero = {},
  pages = {301--309},
  booktitle = {{W}estern {P}acific international meeting and workshop on {T}oga {C}oare : proceedings},
  year = {1989},
  URL = {https://www.documentation.ird.fr/hor/fdi:30217},
}