Background: Ultraviolet radia on is present in sunlight. If ultraviolet radia on exceeds the limit, it can cause detrimental effects on human health such as skin cancer and cataract. Materials and Methods: In this descrip ve cross-sec onal study, the level of solar ultraviolet radia on type A (UVA) were measured using UV LOG HAND HELD in Kermanshah city. The intensity of ultraviolet radia on was measured three mes a day including two hours before noon, noon and two o'clock in the a.ernoon. The results were analyzed using ANOVA sta s cal tests with a confidence interval of 95%. Results: The lowest and highest average intensity levels of solar UVA in Kermanshah were in December (14.21± 0.94 w/m2) and August (32.87 ±2.3 w/m2), respec vely. Also, winter and summer seasons (with average intensi es of 16.37± 1.12 w/m2 and 30.12±1.7 w/m2) had the lowest and highest intensity of this radia on, respec vely. Conclusion: Regarding that UVA radia on exceeds the safe exposure level, even in the winter in Kermanshah, it is recommended for people to avoid from long-term staying in open spaces at noon and use proper protec ve wears especially in summer.

The measurement of solar ultraviolet radiation in Kermanshah city over a one-year period from 2015 to 2016

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/m, respectively. Also, the lowest intensity of UVA and UVB radiation during the whole year was 22.19 and 0.79 W/m, 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.

Assessment of solar ultraviolet radiation in Tabriz city, Iran

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Assessment of solar ultraviolet radiation in Tabriz city, Iran