%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture non répertoriées par l'AERES
%A Delcroix, Thierry
%A Picaut, Joël
%A Eldin, Gérard
%T Equatorial Kelvin and Rossby waves evinced in the Pacific ocean through GEOSAT sea level and surface current anomalies
%D 1991
%L fdi:34270
%G ENG
%J Journal of Geophysical Research
%@ 0148-0227
%K ONDE ROSSBY ; DONNEES SATELLITE ; NIVEAU MARIN ; ANOMALIE ; COURANT SUPERFICIEL
%K ONDE KELVIN ; SATELLITE GEOSAT
%K PACIFIQUE TROPICAL
%P 3249-3262
%U https://www.documentation.ird.fr/hor/fdi:34270
%> https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_5/b_fdi_31-32/34270.pdf
%V 96 suppl.
%W Horizon (IRD)
%X Equatorial Kelvin and Rossby waves are comprehensively demonstrated over most of the equatorial Pacific basin, through their signatures in sea level and zonal surface geostrophic current anomalies. This was made possible with altimeter data pertaining to the first year of the Geosat (Geodetic Satellite) 17-day exact repeat orbit (November 8, 1986, to November 8, 1987). To this end, along-track corrected Geosat sea level anomalies (SLAs), relative to the time period of interest, were first smoothed using nonlinear and linear filters. The original 17-day time step was then reduced by combining all ascending and descending tracks within 10° longitudinal bands. Finally, SLAs were gridded onto a regular grid, and low-pass filters were applied in latitude and time in order to smooth out remaining high-frequency noise. Anomalies of zonal surface geostrophic current were calculated using the first and second derivatives of the SLA meridional gradient, off and on the equator respectively
%$ 032DYNEAU ; 032CLIMET