Tuesday, August 10, 2010

Beach umbrellas not a big help, no matter their size - study

Well, for the record, I like this one, because the group that made the study is not from US or France, or the usual source of studies or researchs.


Read on...


Beach umbrellas do not block all solar radiation, says study

MADRID: Hiding out under a beach umbrella may offer you far less protection from the sun's armful

ultraviolet radiation than you expect, according to a new study by Spanish researchers.

As much as 34 percent of ultraviolet radiation, found to cause skin cancer and cataracts, reaches the round covered by a beach umbrella, the University of Valencia researchers found.

This is because the umbrellas catch almost all of the direct rays but not the diffused radiation that penetrates through from the sides, according to the research published in the journal Photochemistry and Photobiology this week.

To carry out the study, researchers placed an ultraviolet ray sensor on the base of a blue and white canvas umbrella with a radius of 80 centimetres and a height of 1.5 metres.

"The umbrella intercepts the direct radiation that comes from the sun, but part of the diffused radiation, which makes up approximately 60 percent of the total, reaches the sensor from the sky not covered by the umbrella," study co-author Jose Antonio Martinez-Lozano said.

In addition to the use of umbrellas, doctors recommend people use sun creams, hats and clothing when at the beach to guard against ultraviolet  radiation, and avoid hours when the sun is at its highest.

- AFP/de

From ChannelNewsAsia.com; source article is from below page:
Beach umbrellas do not block all solar radiation, says study

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