Oceanographic conditions during a relaxation phase of a winter upwelling event off Point Lengua de Vaca, Coquimbo Condiciones oceanográficas durante la fase de relajación de un evento de surgencia invernal frente a Punta Lengua de Vaca, Coquimbo

Moraga J.; Valdebenito, E; Rutllant, J.

Abstract

Oceanographic stations in a 12 nm transect off the upwelling focus of Punta Lengua de Vaca and adyacent area were occupied using CTD and bottles to 350 m depth on August 10 to 17, 1990. The characteristics and dynamics of coastal and oceanic waters are analyzed and interpreted by means of T-S profiles and geostrophic speed estimates. The observational period coincided with a relaxation of the coastal wind followed by an upwelling-favorable wind event, as observed "in situ" by an automatic metereological station. Differences of the temperature and salinity behavior at the coastal stations with respect to the oceanic ones are explained by intrusion of oceanic water masses and the influence of internal gravity waves. Geostrophic estimates relative to the 300 db level indicate northward currents of the order of 10 cm*s-1 in the first 100 m depth layer and southward ones under that level, consistent with the classical coastal upwelling scheme. The influence of the upwelling focus on the Tongoy and Guanaquero bays located north of Punta Lengua de Vaca is analyzed.

Más información

Título según SCOPUS: Oceanographic conditions during a relaxation phase of a winter upwelling event off Point Lengua de Vaca, Coquimbo [Condiciones oceanográficas durante la fase de relajación de un evento de surgencia invernal frente a Punta Lengua de Vaca, Coquimbo]
Título de la Revista: INVESTIGACIONES MARINAS
Volumen: 29
Número: 1
Editorial: Escuela de Ciencias del Mar, Pontificia Universidad Católica de Valparaíso
Fecha de publicación: 2001
Página de inicio: 59
Página final: 71
Idioma: Spanish
URL: http://www.scopus.com/inward/record.url?eid=2-s2.0-33847358186&partnerID=q2rCbXpz
Notas: SCOPUS