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The Ecology of the Tamar Estuary II. Under-Water Illumination

Published online by Cambridge University Press:  11 May 2009

L. H. N. Cooper  and
A. Milne
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Extract

The Zeiss Pulfrich photometer, with its eight spectral niters covering narrow spectral bands within the visible spectrum, has been used to investigate the penetration of light into an estuary under winter and summer conditions.

Throughout the visible spectrum, extinction coefficients in Hamoaze are always higher, in winter often very much higher, than in the English Channel. In marked contrast to the open sea, red light penetrates as well or better than green, and blue is cut down most rapidly

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 22 , Issue 2 , April 1938 , pp. 509 - 527
Copyright
Copyright © Marine Biological Association of the United Kingdom 1938

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