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Ultraviolet Radiation Protection by a Beach Umbrella
Citation
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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Copyright Statement
The definitive published version is available online at: http://interscience.wiley.com
DOI: doi:10.1111/j.1751-1097.2009.00677.x
Abstract
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: | Environment |
| Objective Group: | Atmosphere and Weather |
| Objective Field: | Atmosphere and Weather not elsewhere classified |
| Author: | Nunez, M (Dr Manuel Nunez) |
| ID Code: | 65226 |
| Year Published: | 2010 |
| Web of Science® Times Cited: | 15 |
| 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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