Optika Atmosfery i Okeana Journal

Vol. 24, issue 09, article # 8

Zhdanova E. Yu., Chubarova N. E. Estimation of different atmospheric parameters impact on biologically active UV irradiance according to calculations and measurements. // Optika Atmosfery i Okeana. 2011. V. 24. No. 09. P. 775-781 [in Russian].
Copy the reference to clipboard

Abstract:

Different factors (sun elevation, total ozone, surface albedo, optical propeties of aerosols and clouds), which influence on the two types of biologically active ultraviolet irradiance (Q_bio) - erythemally weighted UV irradiance (Q_ery) and vitamin D action spectrum weighted UV irradiance (Q_vitD) - were analyzed. The Q_bio sensitivity to some factors is characterized by Radiation Amplification Factor (RAF). It was revealed that sun elevation and total ozone determine the strongest difference between the character of Q_ery and Q_vitD changes. The Q_ery and Q_vitD were shown to have different sensitivity character to total ozone, which depends on sun elevation. Modelling of RAF values due to aerosol and cloud optical thickness and surface albedo have shown insignificant differences between Q_ery and Q_vitD. Along with calculations of sensitivity to various factors, we also estimated the ranges of Q_bio variations in different conditions, which in some cases were supported by the analysis of measurements of Q_ery at the Meteorological observatory of the Moscow State University.

Keywords:

biologically active ultraviolet irradiance, Radiation Amplification Factor, total ozone, aerosol optical thickness, single scattering albedo, cloud optical thickness, surface albedo