The Effect of Atmospheric Transmittance of UVB Solar Irradiance to Broadband Solar Radiation at Different Climate Sites

In the present research, continuous measurements of global solar radiation (G) and UVB are taken in different climate sites during period time from 1986 to 2020 for all weather conditions. The differences between measured calculated energy values vary 1% 2.2%. average hourly intensity ratio current study's total was 0.294%. contrast, UVBext. corresponding Gext., UVBext./Gext., 1.563%, demonstrating much greater degree attenuation relative radiation. transmission through can be evaluated investigation, where typical estimations declining due air as a daytime component. change monthly UVB/G% may caused by increase decrease both G UVB's values. mean UVB/G varies 0.15% January 0.30% June. also lower afternoon compared morning. effect aerosols on fluctuation transparency have contributed levels afternoon. reduction throughout this research were 92.21%, 90%, 90.2%, 90.1 Hurghada, El-Kharga, Dammam, Hail, respectively, study. Inversely, relationship UVI zenith angle (SZA) at selected locations. RAF under clear skies equal 1.058, 1.003, 1.027, 1.087 Hail research. skies, rise 1.058%, 1.003%, 1.027%, 1.087% if slant ozone value examined decreases 1%. Ozone variations high angles result non-linear transmission.