%0 Conference Proceedings
%9 ACTI : Communications avec actes dans un congrès international
%A Delcroix, Thierry
%A Eldin, Gérard
%A Picaut, Joël
%T GEOSAT sea level anomalies in the Western equatorial Pacific during the 1986-87 El Nino, elucidated as equatorial Kelvin and Rossby waves
%S Western Pacific international meeting and workshop on Toga Coare : proceedings
%C Nouméa
%D 1989
%E Picaut, Joël
%E Lukas, R.
%E Delcroix, Thierry
%L fdi:30213
%G ENG
%I ORSTOM
%K NIVEAU MARIN ; ANOMALIE ; EL NINO ; ONDE ROSSBY
%K 1986 1987
%K PACIFIQUE EQUATORIAL OUEST
%P 259-268
%U https://www.documentation.ird.fr/hor/fdi:30213
%> https://horizon.documentation.ird.fr/exl-doc/pleins_textes/doc34-08/30213.pdf
%W Horizon (IRD)
%X Thanks to the GEOSAT altimeter data set, information on sea level changes during the 1986-87 El Nino is presented. Special emphasis is placed on the warm pool area, with an evaluation, a detailed description and tentative explanation of the observed Sea Level Anomaly (SLA) changes. Near the 165°E longitude,the onset of the 1986-87 El Nino is characterized by a rapid development of a positive (> 14 cm) equatorial SLA in november-december 1986. This feature occurs in response to an eastward wind anomaly appearing between 140°E-170°W along the equator. The wind induces a downwelling equatorial Kelvin wave with phase speed of about 2.3 m.s.-1. Thereafter, equatorial SLA remains quite constant from january to april/may 1987. In june 1987, equatorial SLA decreases to a minimum value, just after an abrupt change of the zonal wind stress anomaly, west of 165°E. Such anomaly seems to force an upwelling equatorial Kelvin wave propagating at about 2.3. m.s-1.
%B Western Pacific International Meeting and Workshop on Toga Coare
%8 1989/05/24-30
%$ 032DYNEAU