Author/Authors :
Mehnati, P Department of Medical Physics - School of Medicine - Tabriz University of Medical Sciences, Tabriz, Iran , Sabri, H Department of Physics - University of Tabriz, Tabriz, Iran , Meynaghizadeh Zargar, R Department of Medical Physics - School of Medicine - Tabriz University of Medical Sciences, Tabriz, Iran , Rasoulzadeh, Y Occupational Health Engineering Department - Tabriz University of Medical Sciences, Tabriz, Iran , Mahmoudi, D Occupational Health Engineering Department - Tabriz University of Medical Sciences, Tabriz, Iran , Malekzadeh, R Student Research Committee - Tabriz University of Medical Sciences, Tabriz, Iran - Department of Medical Physics - School of Medicine - Tabriz University of Medical Sciences, Tabriz, Iran
Abstract :
Background: The solar radiation consists of a vast spectrum of wavelengths such as visible light and ultraviolet radiation (UVR). The amount of UVR that
reaches the Earth's surface is very important due to its role in vitamin D
synthesis and causing skin cancers. The hourly and daily mean values of solar
UV type A, B, and visible light radiation were measured for the first time
during the year. Materials and Methods: The hourly and daily mean values of
UVR and visible light intensity of solar radiation at Tabriz were measured and
analyzed between the 2017 and 2018 years. The intensity of solar UVA and
UVB radiation was measured by Hand-held Lux-UV meter device from sunrise
to sunset for one hour. Results: The results showed that the highest values of
UVA and UVB radiation, reaching the Earth were between 12 and 13 o’clock.
The maximum and minimum values of UVR were recorded during the months
of May and January, respectively. The maximum amounts of UVA and UVB
during the whole year were 52.48 and 2.82 W/m2, respectively. Also, the
lowest intensity of UVA and UVB radiation during the whole year was 22.19
and 0.79 W/m2, respectively. Conclusion: Comparison of maximum and
minimum UV amounts of type A and B in May was about 2.36 and 3.56 times
more than in January. The measurements showed that the intensity of UVA was significantly higher than UVB amounts.
Keywords :
Solar ultraviolet radiation , UVA , UVB , visible light , Iran
