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Call for Papers for open call N° 69 of Revista de Investigaciones Geográficas: Una mirada desde el sur.

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Analysis of two photographs from ERTS as possible indicators of coastal upwelling in northern Chile

Authors

  • Fernando L. E. Robles University of Swansea, South Wales
  • Alvaro L. Ulloa Universidad del Norte, Coquimbo
  • José R. Pineda Universidad de Oriente, Cumaná
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Abstract

Shades of gray were observed in two ERTS images off northern Chile coastal waters. These photographs were reproduced in band 5, combined with high-density yellow false colour (diazo) images; afterwards  they were contrasted against several physico-chemical and biological oceanographic  variables. A probable relationship was established among the shades of gray detected, and coastal upwelling of equatorial subsurface water. The significance of this correlation to fisheries-oceanography is discussed, as part of a national policy towards the use of remote sensors in the seach of natural resources.