Atmospheric temperature increases after sunrise to reach its maximum at approximately ٢ hours from midday. The temperature variation curve agrees with the intensity curve of incident solar radiation on the earth surface, but with delay time (tow hour) proportional to the parameters atmosphere and materials. During eclipse of sun, the intensity of solar radiation decreased, and as a consequence, this affects many atmospheric processes, such as temperature of air and wind cycles. These changes can be studied as variations of solar radiation density, which occurs in the short time of the eclipse. These variations can be observed by a spectroscopic study, was the subject of the Damascus university scientific group to studying the total eclipse in Ain- Dewar, which is located at northeast of Syria on ١١-th of August ١٩٩٩. The variations happened in solar spectrum and in the earth atmosphere were recorded and discussed in detail. The recorded diagrams and spectrum were analyzed for the estimation of the magnitude of radiation energy, which was screened during eclipse. They result in the estimation of energy loss by the atmosphere and its parameters like temperature and wind movement. It was shown, that ٦٠٪ of the total solar energy were screened during eclipse, and this was sufficient to cause many changes in wind velocity and temperature of the atmosphere. Because of the eclipse line and neighboring areas considered to be connected with thermodynamic system, thus the energy changes will decrease in the atmosphere, Sowe didn’t calculate it.