关键词: 气候特征, 降水量, 变化趋势

Abstract: According to the annual and seasonal precipitation data of Dalian, Jinzhou and Lvshun stations from 1976 to 2015,and the trend of annual precipitation in three stations nearly 40 years were analyzed by using climate trend and annual change precipitation methods. The results showed that the annual precipitation of both Dalian and Lvshun stations presented linear increasing trend. The rate of rise between the two places was almost the same,and the increasing vecolity of Dalian station was 15.7 mm/10 a,and which was 15.3 mm/10 a in Lvshun station. The annual precipitation of Jinzhou station presented linear decrease trend,and the decrease vecolity was -4.7 mm/10 a. Analyzing the viaration trend the seasonal rainfall of three stations in rencent 40 years,the results showed that the precipitation of the three stations presented linear increasing trend in spring and autumn,especially in spring. while the precipitation was going down in summer and winter,and the decreased trend of winter rainfall was not as obvious as that of summer rainfall. Especially the summer rainfall of Jinzhou staion was much larger than that of the other two stations. And the base of precipitation in summer was larger, which was the main reason for the decrease of annual precipitation in Jinzhou station.

Key words: climatic characteristics, precipitation, viaration trend