A series of 12 meridional transect along longitude 165°E in the Western Equatorial Pacific ocean were made between mid-1986 and mid-1988 : a time interval spanning an El Nino/Southern Oscillation (ENSO) event. Data collected on these cruises provide a detailed (albeit temporally sparse) view of the oceanic changes which occur in the Western Pacific during an ENSO event. The present work focuses on the evolution of the upper ocean thermohaline and zonal velocity fields as revealed by high resolution hydrographic casts and direct near surface velocity measurements. Onset of the El Nino was characterized by anomalous eatsward transport of warm surface waters equatorward of 10° latitude (where anomalies are relative to a mean state defined by historical hydrographic data and recent observations during non-ENSO periods). (D'après résumé d'auteur)
Plan de classement
Dynamique des eaux [032DYNEAU]
Descripteurs
EL NINO ; COUPLAGE OCEAN ATMOSPHERE ; NIVEAU MARIN ; HAUTEUR DYNAMIQUE ; VARIATION INTERANNUELLE
