Open AccessAnálisis de dos fotografías ERTS como posibles indicadores de surgencia costera en la zona norte de Chile
Author(s) -
Fernando L. E. Robles,
Alvaro L. Ulloa,
José R. Pineda
Publication year - 1977
Publication title -
investigaciones geográficas
Language(s) - English
Resource type - Journals
eISSN - 0719-5370
pISSN - 0718-9575
DOI - 10.5354/0719-5370.1977.27357
Subject(s) - geography , upwelling , gray (unit) , oceanography , fishery , geology , biology , medicine , radiology
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.