Delcroix Thierry auteur aut IRD Eldin Gérard auteur aut IRD Hénin Christian auteur aut IRD text journalArticle eng text/pdf reformatted digital access As part of the international TOGA program, the ORSTOM Center in Nouméa (New Caledonia) initiated in January 1984 a series of semi-annual cruises along the 165°E meridian from 20°S to 10°N, across the equatorial current system of the western Pacific. This paper presents an analysis of the first six hydrographic (0-1000 m) and current (0-600 m) sections. A detailed description of "typical" January 1986 vertical structures of temperature, salinity and zonal measured velocity is offered. Differences are noted with structures previously obtained in the Tropical Pacific. Compared to the Central and Eastern Pacific, the 165°E data set evidences a much weaker equatorial upwelling and deeper surface isothermal layer and subsurface currents. Compared to the few Western Pacific measurements, the two speed cores of the Equatorial Undercurrent (EUC) previously reported at 100 and 200 m are not observed here. Special attention is given to the eastward equatorial jet (2°S-2°N; 0-75 m) measured in January 1985 when westerly winds were present from the north of New Guinea to 160°E specialized CIRCULATION OCEANIQUE TEMPERATURE SALINITE COURANT MARIN COURANT GEOSTROPHIQUE PACIFIQUE TROPICAL OUEST 032DYNEAU 17 12 2248-2261 1987 https://www.documentation.ird.fr/hor/fdi:27199 10.1175/1520-0485(1987)017<2248:UOWMAT>2.0.CO;2 [F B27199] https://www.documentation.ird.fr/hor/fdi:27199 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_5/b_fdi_20-21/27199.pdf IRD - Base Horizon / Pleins textes 1989-12-06 2006-06-06 fdi:27199 fre