1960—2014年辽宁省汛期暴雨气候特征  

Climate characteristics of flood season rainstorms from 1960 to 2014 in Liaoning province

作　　者：吴琼[1] 赵春雨[1] 牛丹 晁华[1] 张志恒 王大钧[1] 徐方姝 

机构地区：[1]沈阳区域气候中心,辽宁沈阳110166 [2]辽宁省气象信息中心,辽宁沈阳110166 [3]辽宁省气象局,辽宁沈阳110001 [4]辽宁省气象服务中心,辽宁沈阳110166

出　　处：《气象与环境学报》2017年第2期37-43,共7页Journal of Meteorology and Environment

基　　金：辽宁省科技厅农业攻关项目"气象干旱中长期预测评估技术研究"(2015103038);公益性行业(气象)科研专项"近百年全球陆地气候变化监测技术与应用"(GYHY201206012)共同资助

摘　　要：利用1960—2014年辽宁省54个国家气象站逐日降水观测资料,对近55 a辽宁省汛期(6—9月)暴雨日数和暴雨强度的时空变化特征进行了分析。结果表明:1960—2014年辽宁省暴雨集中出现在汛期(6—9月),其中尤以7—8月暴雨出现最多,7—8月暴雨总量占年暴雨总量的72%。近55 a辽宁省汛期暴雨日数呈由东南部地区向西北部地区减少的分布,暴雨强度则自沿海地区向内陆地区减小;辽宁省汛期持续性暴雨主要为连续2 d的暴雨过程,暴雨发生次数不同区域差异较大。1960—2014年辽宁省汛期平均暴雨日数、暴雨强度和暴雨范围均无明显变化趋势,汛期暴雨日数和暴雨强度序列主要变化周期均为12 a,在20世纪90年代二者还存在显著的2 a变化周期。Daily precipitation data at 54 national weather stations from 1960 to 2014 in Liaoning were used to ana- lyze the temporal-spatial variation characteristics of the rainstorms and their intensities during the flood seasons （from June to September）. The results show that most rainstorms appear in flood seasons based on data from 55 years,especiaUy in July and August during which the number of rainstorms takes up 72% of the annual total. The number of rainstorm days decreases from the southeast to the northwest of Liaoning province and the rainstorm in- tensities decrease from coastal regions to inland regions. The lifetime for most rainstorms lasts about two days, and the number of occurring times at different regions is very different. The days, intensities and ranges of rainstorms vary little during the 55 years, with a 12-year variation period of rainstorm days and intensities and a 2-year signifi- cant period in 1990s.

关 键 词：汛期 暴雨 周期 

分 类 号：P468.024[天文地球—大气科学及气象学]