Study on Variation Characteristics of Climate in Benxi County,Liaoning Province in Recent 52 Years

According to the fact of global climate warming,by utilizing the air temperature,precipitation and sunshine data in Benxi County during 1958-2009,applied mathematical statistics method,the variation characteristics of temperature,light,water with time were analyzed.The results showed that:Benxi temperature fluctuated obviously at upward trend,while the precipitation and sunshine fluctuated at decrease trend.The temperature at four seasons are all at increasing trend,it rises most in winter and least in summer;the precipitation showed at decreasing trend in summer and autumn,and increasing trend in spring and winter.Also the precipitation reduced the most in summer and increased the most in winter;sunshine duration changes are all at decreasing trend in spring,autumn and winter but shows increasing trend in summer,spring and winter are the main body for the reduction and no significant change is autumn.