Variation of the enhanced biologically damaging solar UV due to clouds

Parisi, Alfio and Downs, Nathan (2004) Variation of the enhanced biologically damaging solar UV due to clouds. Photochemical and Photobiological Sciences, 3 (7). pp. 643-647. ISSN 1474-905X


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[Abstract]: The variation of the biologically damaging solar UV (UVBE) enhanced by clouds above that of clear sky UVBE has been investigated. This was undertaken for summer through to winter for SZA of 5 to 60o employing an integrated automatic cloud and spectral UV measurement system that recorded the solar UV spectra and the sky images at five minute intervals. The UVBE calculated with action spectra with higher relative effectiveness in the UVA produced the lower percentage of cloud enhanced cases. The DNA UVBE provided the highest percentage of cloud enhanced cases compared to the total number of UV scans with 2.2% cloud enhanced cases. As a comparison, the plant and fish melanoma UVBE provided the lowest percentage of cloud enhanced cases with 0.6% to 0.8% cloud enhanced cases. For the cases of cloud enhanced UVBE, the average ratio of the measured UVBE to calculated cloud free UVBE for the photokeratitis, cataracts, plant, generalized plant damage and fish melanoma action spectra was 1.21 to 1.25. In comparison, the highest value of 1.4 was for the DNA action spectrum.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Reproduced with permission from the Royal Society of Chemistry. Photochemical and Photobiological Sciences located at:
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 11 Oct 2007 00:36
Last Modified: 02 Jul 2013 22:36
Uncontrolled Keywords: clouds; enhanced; UV; spectrum; cataracts; DNA; action spectrum
Fields of Research : 02 Physical Sciences > 0299 Other Physical Sciences > 029904 Synchrotrons; Accelerators; Instruments and Techniques
Identification Number or DOI: 10.1039/b402035a

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