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The enhancement of biological ocular UV radiation on beaches compared to the radiation on grass

Paper ID Volume ID Publish Year Pages File Format Full-Text
29844 44444 2014 7 PDF Available
Title
The enhancement of biological ocular UV radiation on beaches compared to the radiation on grass
Abstract

•The highest ocular UV radiation appears when SEA = 53° on the beach surface.•The highest ocular UV radiation appears when SEA = 43° on the grass surface.•The ocular UV radiation differs significantly between on the two surfaces.•The cumulative ocular UV radiation without protection may be harmful to human eyes.

BackgroundThe influence of albedo on ocular UV exposure has seldom been reported. This paper aimed to explore the enhancement effect on measured ocular UV radiation due to a sand surface compared to measured ocular UV radiation due to a grass surface.MethodsWe measured ambient and ocular UV radiation over the beach and grass surface in Sanya City of China (18.4°N, 109.7°E). The experimental apparatus was composed of a manikin and a dual-detector spectrometer. Integration of both UVA and UVB radiation was used to denote UV radiation. Then biologically effective ocular UVB radiation (UVBE) and the ratios of UVBE of two surfaces were calculated.ResultMaximum of ocular UV radiation versus time over the two surfaces is bimodal. UVBE on the beach is significantly larger than UVBE on the sand, and UVBE peaked at different solar elevation angle (SEA) over the two surfaces (about 53° and 40° on the beach and grass, respectively, according to Bayesian regression). The maximum of ocular UVBE ratios is greater than two, which peaked SEA was about 50°. One hour’s cumulative radiation under sunny weather exceeds thresholds for photokeratitis, conjunctivitis and lens damage.ConclusionsHigher albedo significantly increased biological ocular UV radiation. Tourists on tropical beaches should take protective measures and avoid facing the sun directly, especially when SEA is around 50°.

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The enhancement of biological ocular UV radiation on beaches compared to the radiation on grass
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 141, December 2014, Pages 106–112
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us