TEMIS -- UV index & UV dose based on GOME -- archive

UV index & UV dose based on GOME	UV radiation monitoring
Overview of the data product archive

Example of the time series of the erythemal UV index & UV dose
The main page of this example showed the time evolution of the ozone, the erythemal UV index and the erythemal UV dose for Rome. To see whether these quantities have changed over time, the daily average over the whole period has been computed and then substracted from the data.
The following graphs show the result of this exercise, the conclusion of which is that there has been no increase or decrease as function of time in the ozone, the erythemal UV index and the erythemal UV dose for Rome during the GOME period (1 August 1995 to 31 May 2003).
Note that the data file provided via the List of available stations/places only contains the real data -- the average and difference as shown on this are not in these data files.


The ozone column value at local solar noon in Dobson Units (DU) for Rome averaged over the GOME period (left) and the difference between difference and the ozone column values as function of time (right). The red line in the latter graph is a fit through all the data points. This line is almost exactly horizontal: there is a tiny increase of less then 2 DU.

The clear-sky erythemal UV index local solar noon for Rome averaged over the GOME period (left) and the difference between difference and the ozone column values as function of time (right). The red line in the latter graph is a fit through all the data points. This line is almost exactly horizontal: there is a tiny decrease of less then 0.07.

The daily erythemal UV dose in kJ/m2 for Rome averaged over the GOME period (left) and the difference between difference and the ozone column values as function of time (right). The left graph also shows the UV dose assuming the sky is cloud-free and the UV dose assuming the sky is fully clouded. The red line in the right graph is a fit through all the data points. This line is almost exactly horizontal: there is a tiny increase of less then 0.05 kJ/m2.