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Estructura termal y distribución superficial del clorofila "a" en el Paso Drake durante el verano austral de 1989-1990

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Author
Zambrano Q., E.
Allauca, S.
Arcos, F.
Date
1990

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Alternative Title
Thermal Characteristics and surface distribution of chlorophyll "a" at Drake Passage during austral summer 1989-1990
Abstract
En el verano austral de 1990, durante la II Expedición Ecuatoriana a la Antártica a bordo del B/I ORION se efectuaron dos secciones (ida y retorno) en el Paso Drake, en las cuales se realizaron un total de 28 lances de XBT y el muestreo horario de parámetros superficiales como temperatura del mar, del aire, salinidad, vientos y clorofila "a". Los resultados obtenidos en ambas secciones permiten observar la variación de estos parámetros, en el transcurso aproximado de un mes, en el Paso Drake durante aquella época. Claramente, en las secciones verticales de temperatura, se observa la presencia de los Frentes Polar y Subantártico, dando lugar a una marcada convergencia Antártica. En el transcurso de casi un mes entre las dos secciones, se puede observar el descenso de la temperatura del mar no solo a nivel superficial, sino también en las aguas subsuperficiales. La distribución superficial de la temperatura del aire y de vientos muestran las condiciones ambientales en aquella época. También se presenta la variación superficial de la clorofila "a", en ambas transectas.
During the southern summer of 1990 on the II Ecuadorian Antarctic Expedition, the R/V ORION made two sections (going and coming) in the Drake Passage, taking 28 XBT launches and hourly monitoring of sea surface temperature, air temperature, salinity, wind and chlorophyll "a". Results of both sections show variations of this parameters during this epoch on Drake Passage. On the vertical sections of temperature is clearly determined the presence of Polar and Subantarctic Fronts. On the lapse of one month between both sections, it is observed a fall of the SST, both on surface and in subsurface layers. Distributions of air surface temperature and winds show the environmental conditions at that time. Also, surface chlorophyll "a" variations in both transects are presented.
Journal
Acta Antartica Ecuatoriana
Volume
2
Issue/Article Nr
1
Publisher or University
Instituto Antartico Ecuatoriano
URI
http://hdl.handle.net/1834/3729
Collections
Acta Antártica Ecuatoriana

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