Paper Title
Effect of Data Homogenization on Determination of Temperature Trends over Iran

Abstract
The daily minimum, maximum and mean temperature data at 37 weather stations in Iran from1960 to 2018 are analyzed for homogeneity and trend. Only 12 stations passed the homogeneity test successfully without any break point or outlier. Approximately 86%of the breaks could be explained by the station relocations. Annual anomalies of homogenized series were calculated using as reference the 30-years period 1961-1990. The regional trend of temperature is estimated using mean annual anomalies from stations with similar variability. The minimum temperature have increased significantly in all regions at rate of 0.35-0.63° C/decade. The maximum temperature have positive trend over most regions with the rate of change varying from 0.14 to 0.29 °C/decade. Keywords - Homogeneity, Iran, Temperature, Trend