Busalacchi A.J., McPhaden M.J., Picaut Joël. (1994). Variability in Equatorial Pacific sea surface topography during the verification phase of the Topex/Poseidon mission. Journal of Geophysical Research, 99 (N° C12), p. 24,725-24,738. ISSN 0148-0227.
Titre du document
Variability in Equatorial Pacific sea surface topography during the verification phase of the Topex/Poseidon mission
Année de publication
1994
Type de document
Article
Auteurs
Busalacchi A.J., McPhaden M.J., Picaut Joël
Source
Journal of Geophysical Research, 1994,
99 (N° C12), p. 24,725-24,738 ISSN 0148-0227
As part of the verification phase of the TOPEX/POSEIDON mission, 10-day gridded fields of altimeter data derived from TOPEX geophysical data records are compared with 10-day gridded fields of dynamic height derived from more than 60 moorings of the Tropical Ocean and Global Atmosphere-Tropical Atmosphere Ocean (TOGA-TAO) array in the Equatorial Pacific ocean. Acess to TAO data in real time permits the first 500 days of the TOPEX/POSEIDON mission to be placed in the context of complementary, in situ measurements of surface winds, sea surface temperatures, and upper ocean thermal structure, as well as the time history of these variables prior to lauch. Analysis of the space-time structure in the TOPEX and TAO surface topography data indicates sea level variability primarily due to equatorial Kelvin wave activity generated by intense windbursts west of the date line in association with the 1991-1993 El Nino. Cross correlations between the two data sets are generally >0.7, with RMS differences <4 cm. However, for reasons not fully understood, correlations drop to <0.5 in certain regions off the equator in the Eastern Pacific, and RMS differences can be >5 cm north of the equator in the Central and Eastern Pacific. (Résumé d'auteur)
Plan de classement
Climatologie / Météorologie [032CLIMET]
Descripteurs
ACQUISITION DE DONNEES ; ALTIMETRIE ; SURFACE MARINE ; VENT ; TEMPERATURE DE SURFACE ; FLUX THERMIQUE ; NIVEAU MARIN ; HAUTEUR DYNAMIQUE ; EL NINO
