Publications des scientifiques de l'IRD

Picaut Joël, Busalacchi A.J., McPhaden M.J., Camusat Bruno. (1990). Validation of the geostrophic method for estimating zonal currents at the Equator from Geosat altimeter data. Journal of Geophysical Research, 95 (C3), p. 3015-3024. ISSN 0148-0227.

Titre du document
Validation of the geostrophic method for estimating zonal currents at the Equator from Geosat altimeter data
Année de publication
1990
Type de document
Article
Auteurs
Picaut Joël, Busalacchi A.J., McPhaden M.J., Camusat Bruno
Source
Journal of Geophysical Research, 1990, 95 (C3), p. 3015-3024 ISSN 0148-0227
The applicability of satellite altimeter data for estimating zonal current variability at the equator is assessed using the meridionally differenced form of the geostrophic balance. Estimates of geostrophic zonal flow anomalies in the Equatorial Pacific have been deduced from 17-day collinear altimeter data during the first year of the Geosat exact repeat mission, November 1986 to November 1987. Altimeter-derived geostrophic estimates agree well with in situ zonal current variability. Comparison of low-frequency, near surface zonal current observed from equatorial moorings at 165°E, 140°W, and 110°W yield correlations of 0.83, 0.85 and O.51, respectively, with a mean rms difference of 23 cm s-1
Plan de classement
Dynamique des eaux [032DYNEAU]
Descripteurs
COURANT GEOSTROPHIQUE ; DONNEES SATELLITE ; MODELE MATHEMATIQUE ; SATELLITE GEOSAT
Description Géographique
PACIFIQUE EQUATORIAL
Localisation
Fonds IRD [F B34274] ; Montpellier (Centre IRD) ; Nouméa
Identifiant IRD
fdi:34274
Contact