Solar ultraviolet exposures at ground level in tree shade during summer in south east Queensland

A V Parisi; Michael G Kimlin; J C F Wong; M Wilson

doi:10.1080/09603120020047500

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Solar ultraviolet exposures at ground level in tree shade during summer in south east Queensland

Journal article

Open access

Peer reviewed

Solar ultraviolet exposures at ground level in tree shade during summer in south east Queensland

A V Parisi, Michael G Kimlin, J C F Wong and M Wilson

International Journal of Environmental Health Research, Vol.11(2), pp.117-127

2001

DOI: https://doi.org/10.1080/09603120020047500

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Abstract

ultraviolet

erythema

tree Shade

summer

Data are presented on the effect of the tree canopy transmittance in the visible waveband (VT), canopy width, height and height of the start of the tree canopy (CH) on the solar UV in tree shade on a horizontal plane at ground level during a Southern Hemisphere summer. Of these factors, the VT and CH have an influence on the UV irradiances in the tree shade. The shade ratios (UV in tree shade to that in full sun) for erythemal UV ranged from 0.71 to 0.42, 0.54 to 0.29 and 0.63 to 0.41 for morning, noon and afternoon, respectively, for the VT range of 0.4-1.0. Over the same VT range, the shade ratios for UVA ranged from 0.61 to 0.28, 0.50 to 0.22 and 0.49 to 0.29 for morning, noon and afternoon, respectively. The UV exposures in the tree shade decreased with the VT with a marginally higher decrease in the irradiances for the UVA compared to the erythemal UV. Despite the protection by the tree shade, significant UV in the tree shade of approximately 4 MED (minimum erythemal dose) were received for the latitude in this research on a cloud free summer day on a horizontal plane over a 2-h period centred about solar noon.

Details

Title: Solar ultraviolet exposures at ground level in tree shade during summer in south east Queensland
Authors: A V Parisi (Author) - University of Southern Queensland
Michael G Kimlin (Author) - University of Southern Queensland
J C F Wong (Author) - Queensland University of Technology
M Wilson (Author) - University of Southern Queensland
Publication details: International Journal of Environmental Health Research, Vol.11(2), pp.117-127
Publisher: Taylor & Francis Ltd.
Date published: 2001
DOI: 10.1080/09603120020047500
ISSN: 0960-3123
Copyright note: Copyright © 2001 Taylor & Francis Ltd. This is an electronic version of an article published in Parisi, A V, Kimlin, Michael G, Wong, J C F, Wilson, M (2001) Solar ultraviolet exposures at ground level in tree shade during summer in south east Queensland. International Journal of Environmental Health Research, Vol. 11, No. 2, pp.117-127. International Journal of Environmental Health Research is available online at: http://www.tandfonline.com/openurl?genre=article&issn=0960-3123&volume=11&issue=2&spage=117
Organisation Unit: University of the Sunshine Coast, Queensland; School of Health and Sport Sciences - Legacy
Language: English
Record Identifier: 99450178102621
Output Type: Journal article

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