The spatial variation of solar radiation in Iraq

Abstract

      The solar radiation is a group of ethereal radiation emitted from the sun and it travels in the space in the form of the electromagnetic waves of about 300000KM/SEC light space. The solar radiation is regarded as the main source of energy in the atmosphere that contributes of more than (99.97) parentage of this exploited energy by the atmosphere on the earth surface.

     The solar energy is responsible for all the processes that occur in the atmosphere and earth surface, clouds and rains, etc. Consequently, it controls the climate and life on the earth. Because of the earth is far away from the sun. The earth receives quite little ratio of its heat amounting to 200 million and it stops all the biological and natural aspect of the energy on the earth.