Penhoat Yves du, Gouriou Yves. (1987). Hindcasts of Equatorial sea surface dynamic height in the Atlantic in 1982-1984. Journal of Geophysical Research, 92 (C4), p. 3729-3740. ISSN 0148-0227.
Titre du document
Hindcasts of Equatorial sea surface dynamic height in the Atlantic in 1982-1984
Année de publication
1987
Type de document
Article
Auteurs
Penhoat Yves du, Gouriou Yves
Source
Journal of Geophysical Research, 1987,
92 (C4), p. 3729-3740 ISSN 0148-0227
Two different wind data sets of the years 1982-1984 are used to force in linear multimode model of the Tropical Atlantic ocean. We describe the variations of the Equatorial slope in both cases and investigate the differences betwenthe two runs. The main discrepancy occurs in 1983 for the amplitude of the seasonal signal all along the equator. Models results are also compared with observations (hydrocasts and inverted echo sounders) taken during the Programme Français Océan et Climat dans l'Atlantique Equatorial/Seasonal Response of the Equatorial Atlantic (FOCAL/SEQUAL) field experiment (july 1982 throught october 1984). The contrast between 1983 and 1984 is well captured by the two runs, especially the abnormal flat topography of the sea surface along the equator in the first 3 months of 1984 due to an unusual basin wide relaxation of the Equatorial wind stress. The major discrepancy between model results and observations is found during the upwelling periods east of 10°W, but at that time dynamic height measurements are too sparse to give a good description of these events. (Résumé d'auteur)
