分别以大连市区站、金州新区站和旅顺口区站1976-2015年的逐年及四季降水量为资料,运用年际变化降水量以及气候变率等方法,对3个站近40年的年降水量变化趋势分析.结果表明,大连市区站和旅顺口区站的年降水量均呈线性上升趋势,两地上升速率相差无几,其中,大连市区站上升速率为15.7 mm/10年;旅顺口区站上升速率为15.3 mm/10年;金州新区站的年降水量呈线性下降趋势,下降速率为-4.7 mm/10年.对3个站近40年间春夏秋冬各季的降水量变化趋势分析得出,3个站春季和秋季的降水量都呈线性上升趋势,春季降水量上升趋势尤为明显;夏季和冬季降水量均呈线性减少的趋势,夏季降水量比冬季减少趋势更为明显,特别是金州新区站夏季降水量减少趋势远大于其他两站,而夏季降水量基数较大,是金州新区站年降水量减少的主要原因.%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 present-ed 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 de-creased 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.
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