Study on Climatic Change in Shihezi Region in Resent 48 Years

Based on the 48-year(1961-2008)climatology data collected from 3 meteorological stations in Shihezi region,we analyzed the features and trends of the changes in such climatic elements as annual mean temperature,precipitation,sunshine hours,wind speed,potential evapotranspiration and surface aridity index,by using linear regression,Morlet wavelet analysis and Mann-Kendall abrupt examination.The main results are as follows:1)The annual mean temperature,precipitation and sunshine hours are increasing,but the annual average wind speed are decreasing;2)There are significant positive correlation between potential evapotranspiration and the annual average wind speed,annual sunshine hours,significant negative correlation with annual rainfall,insignificant correlation with annual mean temperature.In the comprehensive influence of climatic factors,the potential evapotranspiration and surface aridity index are decreasing;3)The the annual mean temperature and precipitation had the abrupt ascension in 1970 and 1986,annual average wind speed,annual Potential evapotranspiration and surface aridity index abruptly decreased in 1973,1987 and 1986 respectively,but the sunshine hours had no abrupt changes;4)Various climatic elements have the cyclical change of the 3a-23a criterion respectively.