鞍山地区大暴雨的气候特征研究

Study on the Climatic Characteristics of Heavy Rain in Anshan

依据鞍山市4个国家基本气象观测站(鞍山、海城、台安、岫岩)1960—2012年的逐日降水资料,选取这53年鞍山地区发生的60个大暴雨日个例进行气候特征统计分析。结果表明:鞍山地区大暴雨出现频次为1.1次/年,集中出现在7—8月份,岫岩县大暴雨出现频次相对较高;鞍山地区大暴雨“三带”环流特征明显,中低纬天气系统相互作用,气旋类大暴雨是最主要的天气影响系统。

Based on the daily precipitation data of the four national basic meteorological observation stations in Anshan City(Anshan,Haicheng,Tai'an,and Xiuyan)from 1960 to 2012,the 60 heavy rainstorm days that occurred in Anshan area during the 53 years were selected for statistical analysis of climate characteristics.The results show that the frequency of heavy rainstorms in Anshan area is 1.1 times per year,concentrated in July-August,and the frequency of heavy rainstorms in Xiuyan County is relatively high;the"three belts"circulation characteristics of heavy rainstorms in Anshan area are obvious,and the middle and low latitude weather systems interact,Cyclone heavy rain is the most important weather system.