Global climate change response of Xi'an area

Based on the observed data of precipitation,temperature from 1951 to 2005 in Xi'an,the climate change characteristics were analyzed. The results showed that the temperature of Xi'an had an increasing trend with fluctuation,especially in winter. The decadal mean annual temperature in Xi'an was increased by 0. 296℃ / 10a,more than the same period in the national annual average rate of warming by 0. 04℃ /10a. Temperature increasing mainly took place after 1990; The decadal annual precipitation was reduced by 6. 752 mm,lower than the national average annual amount decreasing 1. 269 mm. However,winter precipitation showed an upward trend; The test with SPSS software revealed that mean annual precipitation and mean annual as well as the spring, summer,autumn rainfall and temperature were negatively correlated. Winter precipitation and temperature was positively correlated. Between the two showed a significant linear correlation,and the adoption of a = 0. 01 level of significance test; Compared with other 2 cities like Baoji,Weinan in the Guanzhong,Xi'an experienced largest increase in temperature,precipitation reduction was the smallest; Xi'an,Baoji,Weinan will have a warming and drying trend in recent years.