Scientia Marina, Vol 70, No 4 (2006)

Seasonal hydrodynamical features on the continental shelf of Colima (west coast of Mexico)

José Salas
Centro de Ecología y Pesquerías-Universidad Veracruzana. Boca del Río-Veracruz , Mexico

Damià Gomis
IMEDEA (Univ. de les Illes Balears-CSIC). Mallorca , Spain

Aramis Olivos-Ortiz
CEUNIVO-Universidad de Colima. Colima , Mexico

Geraldine Garcia-Uribe
CEUNIVO-Universidad de Colima. Colima , Mexico


Four high-resolution hydrographic surveys were carried out in 2002 on the continental shelf of Colima, Pacific coast of Mexico. The data collected revealed the presence of cyclonic and anticyclonic eddy-like features covering the whole extension of the shelf, which is a rather different pattern from the along-shore general circulation described in previous works. Despite the apparent complexity of the circulation features, the overall shelf-slope exchange pattern is similar in autumn and winter and the opposite in spring. In summer the exchanges also have a similar distribution to autumn and winter, but they are restricted to the upper layers. This suggests that the observed circulation features could result from the interaction between the large-scale seasonal circulation and some kind of local forcing.


west coast of Mexico; Colima shelf; seasonal hydrodynamics

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