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Ultraviolet Radiation Protection by a Beach Umbrella


Utrillas, MP and Martinez-Lozano, JA and Nunez, M, Ultraviolet Radiation Protection by a Beach Umbrella, Photochemistry and Photobiology, 86, (2) pp. 449-456. ISSN 0031-8655 (2010) [Refereed Article]

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DOI: doi:10.1111/j.1751-1097.2009.00677.x


A beach umbrella intercepts all direct UV irradiance, but only part of the diffuse component. Using a simple sky view factor model, we have determined the fraction of the hemispheric diffuse irradiance that is not intercepted by the umbrella. Assuming a sensor at the surface and close to the center of the umbrella, isotropic diffuse irradiance and for an umbrella of 80 cm radius and 100 cm high, our results show that approximately 34% of the incident horizontal irradiance is not intercepted by the umbrella. These results agree with irradiance measurements conducted with and without the umbrella. The model is next extended to examine receipt of UV radiation by a human figure in a vertical position, either standing or sitting.

Item Details

Item Type:Refereed Article
Keywords:UVA and UVB irradiation, skin cancer, sun protection
Research Division:Earth Sciences
Research Group:Atmospheric sciences
Research Field:Atmospheric radiation
Objective Division:Environmental Management
Objective Group:Air quality, atmosphere and weather
Objective Field:Air quality, atmosphere and weather not elsewhere classified
UTAS Author:Nunez, M (Dr Manuel Nunez)
ID Code:65226
Year Published:2010
Web of Science® Times Cited:20
Deposited By:Geography and Environmental Studies
Deposited On:2010-10-18
Last Modified:2011-03-28
Downloads:1 View Download Statistics

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