Spring Climatic Change and Its Impacts on Agriculture in Anshan City

The data of air temperature,precipitation,mean highest and lowest temperatures,soaking rain etc.of Anshan city from Anshan observation station in 1951～2005 were analyzed by the methods such as air temperature anomaly,linear trend,moving average and wavelet analysis.It was found from the results that the climatic change characteristics of Anshan city in spring in recent 55 years were as follows: the air temperature and precipitation showed increasing trend and the spring precipitation had main change periods of 19～20,5 and 3 years with little decreasing trend of sunlight;The increment of mean lowest temperature was higher than that of mean highest temperature and the daily difference of air temperature reduced;The soaking rain inclined to be late and the frequency of extreme climate event increased.