UV effects on human health

Solar UV radiation exposure on humans can have harmful but also beneficial effects on human health. The solar UV Index provides the expected risk of overexposure to UV radiation from the sun. UV index is connected with the erythemal UV dose. UV can normally penetrate the skin only about 0,6mm deep and affects mostly epidermal cells causing melanoma. UVB radiation is also responsible for DNA damage. Finally, UV of wavelengths less than 310nm also stimulates the synthesis of biologically active vitamin D3 from provitamin by photoconversion.

The figures below represent daily updated and past satellite data (GOME-2 and OMI) of:

  • Solar Ultraviolet Index (UVI) for local noon, at Athens (top left) and Thessaloniki (top right). Blue dots represent this years’ measurements and black (continuous/green area), black and red lines the mean, 1 sigma and 2 sigma (calculated from the 2002-last year period), respectively.
  • DNA damage dose induced by solar UV radiation (in W/m2) in Athens (middle left) and Thessaloniki (middle right), Greece. Blue dots represent this years’ measurements and black, green and red lines the mean, 1 sigma and 2 sigma (calculated from the 2002-last year period), respectively.
  • Vitamin D dose (VID) induced by solar UV irradiance for Athens (bottom left) and Thessaloniki (bottom right), Greece. Blue dots represent this years’ measurements and black, green and red lines the mean, 1 sigma and 2 sigma (calculated from the 2002-last year period), respectively.