The corresponding air temperature data were contrastively analyzed between new and old observation station at Toksun national general weather station. It was found that there was significance difference in air temperature between new and old station. 78 percent of months had significance difference in average, average maximum, average minimum air temperature between new and old station. Preliminary analysis showed that significance difference in air temperature resulted from the geographical

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... ironment, underlying surface properties and urban heat island effect. The air temperature data of new station were emended to old station by unitary linear regression analysis, which could get homogeneity air temperature data representing local air temperature change.