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Variabilidad espacial y estacional de temperatura, salinidad y densidad en Bahía Concepción, Golfo de California, México

This study analyzed the seasonal and spatial (longitudinal, transverse and depth) variability of temperature, salinity, and density in the Bahía Concepción in the Gulf of California, Mexico. CTD data from 4 oceanographic cruises carried out during 1994 (winter, spring, summer, and autumn) were used....

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Published in:Revista de biología marina y oceanografía 2012, Vol.47 (3), p.489-502
Main Authors: Gaviño Rodríguez, Juan, Obeso Nieblas, Maclovio, Obeso Huerta, Hipólito
Format: Article
Language:por ; spa
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Summary:This study analyzed the seasonal and spatial (longitudinal, transverse and depth) variability of temperature, salinity, and density in the Bahía Concepción in the Gulf of California, Mexico. CTD data from 4 oceanographic cruises carried out during 1994 (winter, spring, summer, and autumn) were used. The presence of wind-driven southeast upwelling at the mouth of the Bahía de Concepción was found during stratified and warm conditions in the spring and summer of 1994, with the highest index of wind-induced upwelling and the maximum frequency of Brunt-Väisälä in spring. The Bay was stratified and warm in temperature during spring and summer with the thermocline, halocline, and pycnocline more pronounced in spring. This was mainly due to increased solar radiation and the arrival of cold and less salty water from the Gulf of California, caused by upwelling on the west coast of the gulf generated by the winds from the southeast. Meanwhile in autumn and winter the Bahía Concepción showed homogeneous and cold conditions, produced by strong northwest winds and lower solar radiation. The distribution of temperature, salinity, and density varied seasonally and spatially due to solar radiation, warm stratification, upwelling, and wind-driven flow. Conditions in the Bay ranged from homogeneous and cold to stratified and warm, apparently separated by two short transition periods. Se analizó la variabilidad estacional y espacial (longitudinal, transversal y profundidad) de la temperatura, salinidad y densidad en Bahía Concepción en Golfo de California, México, con datos de CTD de 4 cruceros oceanográficos realizados durante 1994 en invierno, primavera, verano y otoño. Se encontró la presencia de la surgencia impulsada por el viento del sureste en la boca de Bahía Concepción durante la condición estratificada y cálida de primavera y verano de 1994, con el mayor índice de surgencia inducida por el viento y la máxima frecuencia de Brunt-Väisälä en primavera. Se observó la bahía estratificada y cálida durante primavera y verano, con la termoclina, haloclina y picnoclina más pronunciadas en primavera, debido principalmente a la mayor radiación solar recibida y al arribo de aguas frías y menos saladas desde el Golfo de California, originadas por la acción de la surgencia en la costa occidental del Golfo de California, generada por los vientos del sureste. Mientras tanto, en otoño e invierno se presentó la condición homogénea y fría, producida por los fuertes vientos del noroes
ISSN:0717-3326
DOI:10.4067/S0718-19572012000300011