GRID-Arendal: State of the Environment Norway - The ozone layer
UV Intensity : January
The UV index used in the maps have been developed by
Environment Canada. It runs on a scale from 0 to 10, with 10 being a typical mid-summer, sunny day in the tropics. A relative scale ranging from low to extreme is also applied: In extreme conditions (UV Index higher than 9) light, untanned skin will burn in less than 5 minutes.
The maps shows UV intensity at noon calculated from sun angle and satelitte measurements of the ozone layer. The model assumes clear sky conditions at sea level and average sun reflection. With increased altitude and reflection - for instance instance snow conditions in mountain areas - the UV dose can be considerably higher.
