| Summary: | El objetivo del presente trabajo es estudiar la estructura termohalina superficial y subsuperficial de una región del Pacífico Sudeste (Guayaquil-Valparaíso), Fig. 1, durante el término de la primavera austral de 1997 para determinar los posibles cambios en la circulación. Para esta fecha se dio comienzo la VII Expedición Ecuatoriana a la Antártida a bordo del B/I ORION y simultáneamente se estaba desarrollando un evento ENOS de intensidad fuerte. During the VII Ecuadorian Expedition to the Antarctic (December of 1997) the B/I ORION carried out oceanographic stations and XBT launches in the track (Guayaquil-Valparaiso in order to determine the change in circulation and termohaline structure on Southeast Pacific during the development of the ENSO event. By means of Sea Surface Temperature, sections of temperature and salinity diagrams T/S, were observed, positive surface and subsurface anomalies of subtropical surfaces waters that suggest a reforcement of the Equatorial undercurrent those feed the Gunther Undercurrent and the Perú-Chile Countercurrent those go toward the south, forcing to turn early toward the west to the Oceanic Current of Humboldt and to fathom the Chile Coastal Current Measures of direct current even the 100 meters demonstrate the great flow from north. Incluye ref.bibl., ilus. Published Pacifico sudeste
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