Busalacchi A.J. auteur aut IRD McPhaden M.J. auteur aut IRD Picaut Joël auteur aut IRD text journalArticle eng text/pdf reformatted digital access 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) specialized ACQUISITION DE DONNEES ALTIMETRIE SURFACE MARINE VENT TEMPERATURE DE SURFACE FLUX THERMIQUE NIVEAU MARIN HAUTEUR DYNAMIQUE EL NINO PACIFIQUE EQUATORIAL 032CLIMET 99 N° C12 24,725-24,738 1994 0148-0227 https://www.documentation.ird.fr/hor/fdi:42803 0148-0227 [F B42803] https://www.documentation.ird.fr/hor/fdi:42803 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_6/b_fdi_37-38/42803.pdf IRD - Base Horizon / Pleins textes 1995-11-13 2006-05-27 fdi:42803 fre