Diffuse component of solar ultraviolet radiation in tree shade
Article
Article Title | Diffuse component of solar ultraviolet radiation in tree shade |
---|---|
ERA Journal ID | 2243 |
Article Category | Article |
Authors | Parisi, A. V. (Author), Kimlin, M. G. (Author), Wong, J. C. F. (Author) and Wilson, M. (Author) |
Journal Title | Journal of Photochemistry and Photobiology, B: Biology |
Journal Citation | 54 (2-3), pp. 116-120 |
Number of Pages | 5 |
Year | 2000 |
Publisher | Elsevier |
Place of Publication | Lausanne, Switzerland |
ISSN | 1011-1344 |
1873-2682 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/S1011-1344(00)00003-8 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S1011134400000038 |
Abstract | The first set of quantitative data of diffuse erythemal UV and UV-A radiation in tree shade at a sub-tropical Southern Hemisphere latitude is presented. Over the summer, approximately 60% of the erythemal UV radiation in tree shade is due to the diffuse component. Similarly, approximately 56% of the UV-A radiation in tree shade is due to the diffuse component. In tree shade these diffuse UV percentages are relatively constant from the morning to noon to afternoon periods. In comparison, in full sun, there is a decrease in the percentage of diffuse UV from morning to noon to afternoon. The exposures to diffuse UV on a horizontal plane in tree shade between 9:00 EST and 15:00 EST are of the order of 4 MED (minimum erythemal dose)and 14 J cm -2 for erythemal UV and UV-A, respectively. The high diffuse UV component in the shade may result in high UV exposures not only to unprotected parts of the body on a horizontal plane, but also in equally high UV irradiances to parts of the body, including the eyes and face, that are not UV protected. |
Keywords | diffuse radiation; tree shade; UV; erythema; UVA |
ANZSRC Field of Research 2020 | 519999. Other physical sciences not elsewhere classified |
370106. Atmospheric radiation | |
511099. Synchrotrons and accelerators not elsewhere classified | |
Public Notes | (C) 2000 Elsevier Science S.A. All rights reserved. |
Byline Affiliations | Centre for Astronomy, Solar Radiation and Climate |
Centre for Astronomy and Atmospheric Research | |
Queensland University of Technology |
https://research.usq.edu.au/item/9xvzv/diffuse-component-of-solar-ultraviolet-radiation-in-tree-shade
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