Studies of the correlation between the global radiation,ultraviolet radiation,cosmic radiation,sunspot number and meteorological parameters

The correlation between the ratio of the global irradiation to the extraterrestrial solar radiation (H/H ₀), and the ratio of the ultraviolet solar irradiation to the extraterrestrial solar radiation (H _u /H ₀) on a horizontal surface at Bahrain (=26°), and some terrestrial and solar parameters (the monthly average relative humidity, temperature, relative sunshine duration, cosmic radiation intensity, and sunspot number) have been studied. Moreover, the role of the solar effects and the terrestrial effects on the global and the solar ultraviolet radiation has been studied. A detailed investigation has been carried between the level of the cosmic radiation received at Bahrain and the sunspot number. It was concluded that as the solar activity increases, cosmic radiation and sunspot number play a predominant effect on the correlation of (H/H ₀) and (H _u /H ₀). Furthermore, the correlation between cosmic radiation and sunspot number also increases.