Turnbull, David J. and Parisi, Alfio (2002) Shade and melanoma inducing wavelengths. In: 2002 Annual Queensland Health and Medical Scientific Meeting, 4-5 Dec 2002, Brisbane, Australia.
Purpose of Study: The UV spectrum under public shade structures has not been previously investigated. This research compares the UV spectrum beneath four common shade structures with that of total solar UV, for relatively cloud-free sky conditions and changing solar zenith angle. No action spectrum exists for human melanoma, but the fish melanoma action spectrum may possibly provide an indication of the effective wavelengths for human melanoma development.
Methodology: The protective nature of the shade environments was investigated by measuring the spectral UV in 1 nm increments in the shade for the three planes of horizontal, 45o and vertical, and comparing it to that on a horizontal plane in full sun. The solar UV in the shade of a shade umbrella, covered veranda, covered sandpit and covered walkway was measured for an increasing solar zenith angle, between March and August.
Results: For a shade umbrella on dry grass with no surrounding vegetation, UV levels in the shade weighted with the fish melanoma action spectrum reached approximately 65% of those in full sun. For a covered sandpit with trees and shrubs in close proximity, UV levels were less than half those for the shade umbrella. The covered walkway and northern facing veranda received potentially damaging UV levels of approximately 39% and 15% respectively, for fish melanoma. An increasing solar zenith angle increased the relative damaging UV in the shade.
Conclusions: The biologically damaging UV for fish melanoma was far from zero in the shade. This may have significant implications for humans.
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|Item Type:||Conference or Workshop Item (Commonwealth Reporting Category E) (Speech)|
|Item Status:||Live Archive|
|Additional Information:||Conference publication consists of only the abstracts of papers presented at the conference. Abstract only, posted here.|
|Depositing User:||Dr David Turnbull|
|Faculty / Department / School:||Historic - Faculty of Sciences - Department of Biological and Physical Sciences|
|Date Deposited:||11 Oct 2007 00:35|
|Last Modified:||02 Jul 2013 22:36|
|Uncontrolled Keywords:||shade, melanoma, ultraviolet radiation|
|Fields of Research :||11 Medical and Health Sciences > 1117 Public Health and Health Services > 111705 Environmental and Occupational Health and Safety
02 Physical Sciences > 0299 Other Physical Sciences > 029999 Physical Sciences not elsewhere classified
04 Earth Sciences > 0401 Atmospheric Sciences > 040103 Atmospheric Radiation
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