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Body Anatomical UV Protection Predicted by Shade Structures: A Modeling Study.
Arianna Religi1, Claudine Backes2,3, Laurent Moccozet1
1Centre Universitaire d'Informatique (CUI), University of Geneva, Geneva, Switzerland.
Photochemistry and Photobiology
|June 8, 2018
Summary
Shade structures significantly reduce direct sun ultraviolet (UV) radiation, especially for the upper body. However, protection varies by shade size, height, and anatomical area, with legs receiving the least protection.
Area of Science:
- Environmental Science
- Public Health
- Dermatology
Background:
- Sun ultraviolet (UV) radiation poses health risks.
- Shade offers protection, but its effectiveness varies.
- Indirect UV exposure (diffuse and reflected) can still impact skin.
Purpose of the Study:
- To quantify UV protection from different shade structures.
- To evaluate the impact of shade size, height, and position.
- To understand the contribution of direct, diffuse, and reflected UV radiation.
Main Methods:
- Utilized SimUVEx v2, a numerical tool based on 3D graphics.
- Modeled ambient ground UV irradiance and shade structures.
- Calculated predictive protection factor (PPF) for UV exposure reduction.
Main Results:
- Shade structures reduced direct UV by 97.1%–99.9% for upper body areas.
- Legs received the least protection (PPF 18.5%–68.1%).
- Larger, lower shades and those closer to the subject offered greater protection.
Conclusions:
- Shade structure design critically influences UV protection efficacy.
- Anatomical location significantly affects UV exposure under shade.
- Optimizing shade structure parameters is crucial for effective UV protection.
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