A monitoring network for erythemally-effective solar ultraviolet radiationin Austria: determination of the measuring sites and visualisation of the spatial distribution
Aw. Schmalwieser et G. Schauberger, A monitoring network for erythemally-effective solar ultraviolet radiationin Austria: determination of the measuring sites and visualisation of the spatial distribution, THEOR APP C, 69(3-4), 2001, pp. 221-229
In 1997 the Austrian ultraviolet radiation monitoring network was to built
up to measure continuously erythemally-effective ultraviolet radiation. For
this network the necessary measuring sites had to be selected by an object
ive method. Therefore a method was used. based on the decorrelation distanc
es, calculated by the daily maximum of the global solar irradiance across t
he entire spectrum. For a correlation coefficient of 0.90, de-correlation d
istances were found to be in the order of 170 km (East-West) and 40 knit (N
orth-South). From this, 7 measuring sites were selected to derive a total c
overage of Austria.
For the visualisation of the measured crythemally-effective solar radiation
an optimum interpolation method was used to calculate the spatial distribu
tion. The topography of Austria was used for height correction. The global
solar radiation of 39 stations is also used to include the spatial distribu
tion of cloud cover and the resulting attenuation of the erythemally-effect
ive radiation. The combination of these two data sets provides an accuracy
estimation of people's exposure to erythemally-effective UV radiation withi
n the mountainous country of Austria.