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Variability of photosynthetic pigments in the Colombian Pacific Ocean and its relationship with the wind field using ADEOS-I data

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Abstract

Variability of the oceanographic conditions in the Colombian Pacific Ocean, a part of the Panama Basin, is subjected to the variability of wind conditions in the equatorial part of the Pacific Ocean. Data of OCTS and NSCAT of ADEOS-I satellite provided as monthly averages for the period November 1996-June 1997 by NASDA, were processed and manipulated. A meridional (N-S) component and a zonal (E-W) component were run in order to analyse the data variability and correlation. It is concluded that the variability of the oceanic surface chlorophyll and SST in the Colombian Pacific is a seasonal event related to the migration of the ITCZ and the generation of a wind jet at the Isthmus of Panama. Upwelling due to the wind rotor is present throughout the whole period, with variable spatial distribution and a tendency to be located towards the eastern part of the basin. In a similar way, high chlorophyll concentrations observed in March coincide with both the intensification of the vertical velocities during that month, and the maximal rise of the thermocline in the northern part of the Panama Basin. Picture series of surface chlorophyll, SST, wind stress and Ekman pumping are provided for the studied area.

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Authors and Affiliations

  1. Oceanography Department, University of Concepcion, Cabina 5, Concepción, 160-C, Casilla, Chile

    Efrain Rodriguez-Rubio & Jose Stuardo

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  1. Efrain Rodriguez-Rubio
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  2. Jose Stuardo
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Rodriguez-Rubio, E., Stuardo, J. Variability of photosynthetic pigments in the Colombian Pacific Ocean and its relationship with the wind field using ADEOS-I data. J Earth Syst Sci 111, 227–236 (2002). https://doi.org/10.1007/BF02701969

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