Published Paper Details:

In this paper we used the data measurements of average hourly and monthly of UV solar radiation during the period time during from 2003 to 2017 at four different selected locations in Saudi Arabia to optimization and evaluation of UVB, UVBest., UVI solar radiation and clearness index KtUVB solar radiation and total ozone column TOC (DU). The average hourly values of UVB transmission are reduced due to the atmosphere as a function of daytime. The effect of the atmosphere on UVB radiation is reflected in the research of its behavior at the Earth�s surface. The high extremely attenuation of UVB solar radiation occur by stratospheric ozone and scattering phenomena. The predicted values of UVB solar radiation are a good agreement with the measured of the UVB solar radiation. The accuracy between measured and predicted values of UVB solar radiation in selected locations in the present research varies from 1.27-3.87%. The maximum values of KtUVB solar radiation occur between Summer and Autumn months, while the minimum values occurs between Winter and Spring months for all locations in the present study. The maximum values of the total ozone column TOC are occur between March and April months at all selected locations with exception Taif site which occur between April and May months, and in whole the highest values of TOC occurs about Spring time in all study locations. The maxiumum values of UVI occurs around the summer and spring months at the selected locations during the period time in the prsent study, while the minumum of UVI occurs around winter and autumn months. The relation between the levels of UVI and solar zenith angle (SZA) at all selected locations in the present research are discussed. The monthly average has a correlation coefficient equal to 72%, 82%, 85% and 83% at Al-Baha, Abha, Jeddah and Taif sites respectively, so the solar zenith angle (SZA) is responsible for variations of UVI by72%, 82%, 85% and 83% at Al-Baha, Abha, Jeddah and Taif locations on the monthly values respectively.