Studying the correlation between solar radiation and air temperatures in different parts of Iraq

Abstract<br /> The Solar Radiation and Air temperature are the main effects at which the climate and atmosphere depend on, In this paper We choose three different places in Iraq to study correlations between (H/Ho) and (1/Tmax), (H/Ho) and monthly mean air temperature (Tmean), (H/Ho) and (Tmax-Tmin)0.5, the third mathematical module gives linearly strong direct correlations which is more strong than other models.<br /> The correlation coefficient (R) for the first model are (0.94, 0.91, 0.74) for Mosul, Baghdad and Nasiriyah stations respectively, The Correlation Coefficient for the second model are (0.93, 0.94, 0.72) for Mosul, Baghdad and Nasiriyah respectively، The correlation coefficient for the third model are (0.98, 0.96, 0.80) for Mosul, Baghdad and Nasiriyah respectively, statistical analysis for Air temperature and Solar radiation in the three stations were used, the estimated solar radiation by the third model were nearly the same as the measured values where the (M.A.E) does not reach more than 2.8 % and (R.M.S.E) is less than 3.3% which mean that this model is highly accurate.