The UV Index is a measure of the intensity of ultraviolet (UV) rays from the Sun. Some exposure to the Sun’s rays is beneficial as it helps our bodies produce vitamin D. But too much exposure to UV rays can have harmful effects. In the short-term, skin exposed to UV rays can burn. A ‘sunburn’ can happen within minutes or over the course of several hours. Over the long term, UV exposure can result in premature aging, skin cancer, and damage to your eyes.
These climatology maps are produced using data collected between October 2004 and January 2011 from the Ozone Monitoring Instrument (OMI) onboard the Aura satellite.