The Statistical Modeling of minimum temperature trend in Central Plateau Basin

Today,climate change reasonse of these changes, forecasting and recognizing the effect of these variations on the other elements and phenomenon on the earth is very important. In this study used of 28 stations in Central Plateau Basin, Iran, during 1969-2008 for modling and surveying the minimum temperature trend. Normal distribution of the annual temperature series were valuated with using Joiner test and Normal probability plot. The obtained results show that the minimum temperature of 7stations in Central Plateau Basin has abnormal distribution.which were surveyed with Daniels nonparametric test and other stations with normal distribution were surveyed with Tr parametric test.The result show 17 station have tendency change or trend amang 28 station. Tendency changes or trend are increase in all stations except Fassa. analyzing and forecasting temperature of the stations whith trend using least square and Quadratic model show that minimum temperature trend in the stations of Hamedan, Dargzin, Sabzevar, Tehran and Semnan is decreasing and for other stations, the obtained forecast show the increasing trend continues in the next year.