Variaciones de la Extensión Sur de la Corriente Cromwell frente al Perú entre los 3 y 14°S

Roberto Flores Palomares; José Tenorio; Noel Domínguez Obregón

Authors

Roberto Flores Palomares Instituto del Mar del Perú
José Tenorio Instituto del Mar del Perú
Noel Domínguez Obregón Instituto del Mar del Perú

Keywords:

Cromwell Current Southern Extension, CCSE, Peruvian hake, variations

Abstract

The variations of the Cromwell Current Southern Extension (CCSE), between 3 and 14°S, within 60 mn, are described based on geostrophic calculations. The time series of the mean depth of the 15 o C isotherm (1961-2005) and of the mean dissolved oxygen values (1980-2005) are presented. The geostrophic flow toward the south, calculated in the sections off Paita, Punta Falsa, Chicama, Chimbote, Callao,
Pisco and San Juan up to 200 mn, showed changes mainly during the summer and autumn seasons concerning
latitudinal extension and deepening. The time series of mean depth of the 15 o C isotherm, along the coast, showed the biggest depth in January and May-June, being shallower in October-November. Oxygen ranges of 2.0-0.5 mL/L showed a strong correlation with the CCSE for depths between 90 to 180 m in northern Peru (3-8o S) where the bottom trawl fishery takes place.

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