RELATION BETWEEN UNDERWATER IRRADIANCE AND QUANTUM IRRADIANCE IN DEPENDENCE ON WATER TRANSPARENCY AT DIFFERENT DEPTHS IN THE WATER BODIES

Authors
REINART A ARST H BLANCOSEQUEIROS A HERLEVI A
Citation
A. Reinart et al., RELATION BETWEEN UNDERWATER IRRADIANCE AND QUANTUM IRRADIANCE IN DEPENDENCE ON WATER TRANSPARENCY AT DIFFERENT DEPTHS IN THE WATER BODIES, J GEO RES-O, 103(C4), 1998, pp. 7749-7752
Citations number
5
Categorie Soggetti
Oceanografhy,"Geosciences, Interdisciplinary","Astronomy & Astrophysics","Geochemitry & Geophysics","Metereology & Atmospheric Sciences
Journal title
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
ISSN journal
21699275 → ACNP
Volume
103
Issue
C4
Year of publication
1998
Pages
7749 - 7752
Database
ISI
SICI code
2169-9275(1998)103:C4<7749:RBUIAQ>2.0.ZU;2-T
Abstract
The ratio between underwater quantum irradiance (q) and irradiance (E) for Jerlov's [1976] oceanic and coastal water types and for 11 Estoni an and Finnish lakes was studied. This ratio was found to depend on th e depth in the water body and the transparency of the water. The ratio q/E for the photosynthetically active radiation (PAR) region of the s pectrum may differ from its value in air by up to 24%. The results of the present paper can be used to convert the underwater radiation data from units of W m(-2) to mu mol s(-1) m(-2) (or vice versa) and to es timate the errors caused by applying the ''air'' value of q/E instead of its real value in the water.