Marine Science Faculty Publications

The Gulf of Tehuantepec and Adjacent Areas: Spatial and Temporal Variation of Satellite-Derived Photosynthetic Pigments [El Golfo De Tehuantepec Y Areas Ádyacentes: Variación Espaciotemporal De Pigmentos Fotosintéticos Derivados De Satélite]

Document Type

Article

Publication Date

1997

Keywords

CZCS, Gulf of Tehuantepec, Photosynthetic pigments, Satellite data

Digital Object Identifier (DOI)

https://doi.org/10.7773/cm.v23i3.809

Abstract

Photosynthetic pigment concentrations retrieved from data generated from 1978 to 1986 by the sensor Coastal Zone Color Scanner were used to describe the seasonal and interannual variation of phytoplankton biomass of the Gulf of Tehuantepec and adjacent areas. The pigment concentrations 0.3 mg m-3 and higher were considered as an index of productive waters. Its spatial coverage shows coastal upwelling in the gulfs of Tehuantepec and Papagayo (in the eastern region of the study area) between October and April, upwelling at the Costa Rica dome during summer, and the transient effect of mixing by tropical storms from July to October throughout the study area. Upwelling events in Tehuantepec and Central America are not synchronous. The region west of the Gulf of Tehuantepec is oligotrophic most of the time (<0.2 mg m-3). The most evident interannual variation was the effect of El Niño 1982-1983, with very low pigment concentrations associated with a deep thermocline in the whole study area. Also, there was an anti-El Niño event in 1985 in the eastern region, with high phytoplankton biomass concentrations associated with a shallow thermocline.

Citation / Publisher Attribution

Ciencias Marinas, v. 23, issue 3, p. 329-340

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