Erythemal Dose Rate and UV Index, Determined through Direct Solar Spectrophotometric Measurements
Abstract
This study investigates the possibility to determine the erythemal dose rate and the UV index using the direct solar UV measurements, performed in Stara Zagora (42° 25' N, 25° 37'E), Bulgaria. For this purpose the ground-level global ultraviolet radiation has been retrieved by means of a solar radiative transfer model, used to calculate the spectral ratio between the global and direct irradiances at the moment of measurement. The UV erythemal dose rates are given as an integral of the UV global solar spectra, obtained in this way, weighted with the erythemal action spectrum in the 290-400 nm wavelength interval. The dependence of the erythemal doses on the total ozone content and on the solar zenith angle has also been estimated. The obtained results are compared with the respective data from satellite experiments.
- Publication:
-
37th COSPAR Scientific Assembly
- Pub Date:
- 2008
- Bibcode:
- 2008cosp...37.2000M