1960—2009年辽宁区域性暴雪气候特征  

Climatic characteristics of regional snowstorm from 1960 to 2009 in Liaoning province

作　　者：阎琦[1] 蒋大凯[1] 陈传雷[1] 崔锦[2] 陆井龙[1] 桑明刚[1] 

机构地区：[1]沈阳中心气象台,辽宁沈阳110016 [2]中国气象局沈阳大气环境研究所,辽宁沈阳110016

出　　处：《气象与环境学报》2012年第4期43-48,共6页Journal of Meteorology and Environment

基　　金：中国气象局公益性行业(气象)科研专项(GYHY201006001);辽宁省气象局科研项目"省市级暴雪短期落区预报技术研究"(201005)共同资助

摘　　要：利用1960—2009年辽宁58个测站逐日降水资料,分析了区域性暴雪气候变化特征。结果表明:辽宁区域性暴雪主要出现在每年11月下旬至翌年3月15日,2月为最多月。近50 a区域性暴雪过程次数呈上升趋势,并且存在9、5a和3a的周期变化;9a的周期变化信号一直存在,但强度自20世纪60年代末开始增强,70—80年代最强;5 a的周期变化信号自70年代初期开始出现,强度在70年代中期开始增强;3a的变化信号一直存在,强度在70年代中期、80年代最强。区域性暴雪过程次数和暴雪总量自东南部向西北部逐渐减少,空间分布有3个中心,分别为:沈阳—抚顺—本溪一带、鞍山附近和丹东凤城地区。辽宁区域性暴雪落区主要有4种分布,分别为中东部暴雪型、东部暴雪型、南部暴雪型和西部暴雪型。Based on the diurnal precipitation data at 58 weather stations from 1960 to 2009,the climatic characteristics of regional snowstorm were analyzed in Liaoning province.The results indicate that the regional snowstorm mainly occurs from the last ten day of November to March 15 of the next year,especially in February.The number of snowstorm is in an increasing trend in the recent 50 years,and there exist the 9-year,5-year and 3-year cycles.The 9-year cycle always exists,and its intensity enhances since 1960s,especially from 1970s to 1980s.The 5-year cycle occurs since 1970s and strengthens since the middle of 1970s.The 3-year cycle always exists,and its intensity is the strongest in the middle of 1970s and in 1980s.The number of regional snowstorm and snowstorm amount decrease from the southeast to the northwest,and three centers of snowstorm are located in Shenyang-Fushun-Benxi area,around Anshan area and in Fengcheng area.The falling area of regional snowstorm could be divided into four types,i.e.the middle and east snowstorm,the east snowstorm,the south snowstorm and the west snowstorm.

关 键 词：辽宁区域性暴雪 气候特征 小波分析 M-K突变检验 EOF分解 

分 类 号：P466[天文地球—大气科学及气象学]