Horizontal and sun normal spectral biologically effective ultraviolet irradiances
Parisi, Alfio V. & Kimlin, Michael G. (1999) Horizontal and sun normal spectral biologically effective ultraviolet irradiances. Journal of Photochemistry and Photobiology B: Biology, 53(1-3), pp. 70-74.
The dependence of the spectral biologically effective solar UV irradiance on the orientation of the receiver with respect to the sun has been determined for relatively cloud-free days at a sub-tropical Southern Hemisphere latitude for the solar zenith angle range 35-64 degrees. For the UV and biologically effective irradiances, the sun-normal to horizontal ratio for the total UV ranges from 1.18 +/- 0.05 to 1.27 +/- 0.06. The sun-normal to horizontal ratio for biologically effective irradiance is dependent on the relative effectiveness of the relevant action spectrum in the UV-A waveband. In contrast to the total UV, the diffuse UV and diffuse biologically effective irradiances are reduced in a sun-normal compared with a horizontal orientation by a factor ranging from 0.70 +/- 0.05 to 0.76 +/- 0.03.
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|Item Type:||Journal Article|
|Additional Information:||For more information, please refer to the journal's website (see hypertext link) or contact the author. Author contact details: firstname.lastname@example.org|
|Keywords:||UV, ultraviolet, sun, solar UV irradiance|
|Divisions:||Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
|Copyright Owner:||Copyright 1999 Elsevier|
|Deposited On:||28 Jun 2007 00:00|
|Last Modified:||10 Aug 2011 16:44|
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