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Conclusions

Because ozone strongly absorbs energy in the UV-B, its depletion causes an important increase of the harmful UV-B radiation reaching the ground. Specific concerns include increases in the incidence of skin cancer and ocular damage. Also, clouds, aerosols and pollution affect the radiation levels. The UV-B radiation can be reduced up to 40% for days with high aerosol load and up to 70% for densely cloudy days.

As long-term prediction of UV-B levels is very difficult and uncertain, we thing that two years is not enough time to get more than qualitative conclusions.

In the near future we will measure UV-B radiation in the site described and in downtown simultaneously in order to assess and compare how UV-B radiation is affected in different environments.