Beach umbrellas do not block out all solar radiation
20 minutes a day of sunshine is a good thing.
~ Uncle Russ
A team of researchers from the University of Valencia (UV) has proven that 34% of ultraviolet radiation filters through under beach umbrellas. According to what is published in the journal Photochemistry and Photobiology, umbrellas intercept the full direct flow that comes from the Sun, but not the diffused radiation that penetrates through from the sides. “We have proven that irradiance (radiation incidence per unit of surface area) that reaches the ground covered by an umbrella is 34% of the total”, José Antonio Martínez-Lozano, co-author of the study and coordinator of the Research Group of Solar Radiation in UV, highlights to SINC.