Even Winter Has High UV Levels - So Plan Outdoor Activities Accordingly

by Tanya Thomas on  November 18, 2010 at 7:48 AM Environmental Health
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 Even Winter Has High UV Levels - So Plan Outdoor Activities Accordingly
Ultraviolet (UV) radiation levels may remain high during winters, so adults participating in outdoor sports should rely on the season and time of day when judging the need for protective clothing and sunscreen, suggests a study.

Peter A. Andersen from San Diego State University, and colleagues investigated the temporal, seasonal, altitudinal and geographic variables to predict the prevalence of UV radiation at North American ski resorts and the decision of adults participating in outdoor snow activities to protect their skin from the damaging rays.

Data were collected at 32 high-altitude ski resorts in western North America from 2001 through 2003.

The authors found that during winter months, average UV levels at the 32 ski areas were moderately low but varied substantially. The strongest predictors of increased UV radiation were clear skies, time close to noon and deviation from the winter solstice.

Additionally, altitude and latitude had minor associations with higher UV radiation and temperature had a small positive relationship with UV levels.

Adult sun protection behaviours did not consistently increase with elevated UV levels, and use of sunscreen lip balm, application of sunscreen 30 minutes prior to skiing, wearing a head cover with a brim and wearing gloves were all unrelated to UV levels.

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