中文摘要：

文章利用廊坊市9个站1964—2013年的降水资料,详细分析了春季首场透雨的时空分布特征,首场透雨日期与春季、夏季降水的关系,并对首场透雨的典型环流特征进行了分析。结果表明：廊坊春季首场透雨出现日期中部早于北部和南部,北部和南部基本一致。透雨日期偏早或偏晚的地方均是易山现异常天气的地区：廊坊地区首场透雨出现日期呈现出提前趋势,每10a提前4-5d：在首场透雨偏早（晚）的年份,春季降水偏多（少）,夏季降水偏少（多）：两风槽和高空冷涡是造成廊坊市首场透雨的主要高空环流形势。

英文摘要：

Based on daily precipitation data of 17 stations in Shijiazhuang during 1972-2006,the spatial and temporal variation features of the first soaking rain in spring were analyzed by using the methods of EOF,REOF and linear trend,and the relations between the first soaking rain date and spring,summer rainfall using the method of correlation analysis,as well as the typical circulation features of the first soaking rain were also analyzed.Results show that the dates of the first soaking rain in spring delayed ge...