Comparison of the spectral biologically effective solar ultraviolet in adjacent tree shade and sun

A V Parisi; Michael G Kimlin

doi:10.1088/0031-9155/44/8/316

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Comparison of the spectral biologically effective solar ultraviolet in adjacent tree shade and sun

Journal article

Open access

Peer reviewed

Comparison of the spectral biologically effective solar ultraviolet in adjacent tree shade and sun

A V Parisi and Michael G Kimlin

Physics in Medicine and Biology, Vol.44(8), pp.2071-2080

1999

DOI: https://doi.org/10.1088/0031-9155/44/8/316

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Abstract

ultraviolet a radiation

ultraviolet b radiation

The solar spectral UVR irradiances in tree shade and sunlight have been measured in a sub-tropical southern hemisphere summer. The spectral data allowed the UVB and UVA irradiances and the biologically effective irradiances to be calculated for different harmful biological processes to human skin and eyes. The average of the ratio of the UVA to UVB irradiances was lower by 26% in the shade compared with the same ratio in the sun. The spectral shade ratio calculated as the ratio of the spectral biologically effective irradiances in the shade to those in the adjacent sun decreased with increasing wavelength for all of the trees. The decrease in the shade ratio was approximately 42% at 400 nm compared with the shade ratio at 300 nm. Despite the UVR protection provided by tree shade, the erythemal UVR exposure received in 1 h in the tree shade exceeded the occupational limit for UVR exposure.

Details

Title: Comparison of the spectral biologically effective solar ultraviolet in adjacent tree shade and sun
Authors: A V Parisi (Author) - University of Southern Queensland
Michael G Kimlin (Author) - University of Southern Queensland
Publication details: Physics in Medicine and Biology, Vol.44(8), pp.2071-2080
Publisher: Institute of Physics Publishing Ltd.
Date published: 1999
DOI: 10.1088/0031-9155/44/8/316
ISSN: 0031-9155
Copyright note: Copyright © 1999 Institute of Physics Publishing Ltd. This is the Author's Accepted version of V Parisi and M G Kimlin 1999 Phys. Med. Biol. 44 2071. The final version is available at: http://dx.doi.org/10.1088/0031-9155/44/8/316
Organisation Unit: University of the Sunshine Coast, Queensland; School of Health and Sport Sciences - Legacy
Language: English
Record Identifier: 99449473702621
Output Type: Journal article

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