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Ultraviolet Radiation Protection by a Beach Umbrella
journal contribution
posted on 2023-05-17, 03:21 authored by Utrillas, MP, Martinez-Lozano, JA, Manuel NunezManuel NunezA 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.
History
Publication title
Photochemistry and PhotobiologyVolume
86Pagination
449-456ISSN
0031-8655Department/School
School of Geography, Planning and Spatial SciencesPublisher
Wiley-BlackwellPlace of publication
United StatesRights statement
The definitive published version is available online at: http://interscience.wiley.comRepository Status
- Restricted