南京雷达中气旋产品特征值统计分析  

A statistical analysis of characteristics of mesocyclone products from Nanjing radar

作　　者：王易 郑媛媛[1,3,4] 孙康远[1,3,4] 吴海英 WANG Yi;ZHENG Yuanyuan;SUN Kangyuan;WU Haiying(Key Laboratory of Transportation Meteorology, China Meteorological Administration, Nanjing 210009, China;Jiangsu Meteorological Observatory, Nanjing 210008, China;Jiangsu Institute of Meteorological Sciences, Nanj ing 210009, China;Nanjing Joint Center of Atmospheric Research, Nanjing 210008. China)

机构地区：[1]中国气象局交通气象重点开放实验室,南京210009 [2]江苏省气象台,南京210008 [3]江苏省气象科学研究所,南京210009 [4]南京大气科学联合研究中心,南京210008

出　　处：《气象学报》2018年第2期266-278,共13页Acta Meteorologica Sinica

基　　金：国家自然科学基金项目(41575036;41475042);江苏省科技厅项目(BE2015731;BE2017776);南京大气联合中心基金项目(NJCAR2016ZD01);江苏省气象局科研重点项目(KZ201704);北极阁基金项目(BJG201509)

摘　　要：为了研究南京中气旋的特征,利用南京新一代天气雷达探测资料对2005—2013年的中气旋产品特征进行统计,重点对持续3个体扫以上的中气旋结构特征进行分析。结果表明:中气旋通常产生在对流有效位能较高和风垂直切变较大的环境条件下,6—7月是中气旋的多发时段,主要出现在午后到前半夜,中气旋的底高、顶高和最强切变与中欧的中气旋分布相似;高质心中气旋有利于冰雹的产生,而低质心、强切变中气旋有利于产生龙卷。Using radar data collected at Nanjing from 2005 to 2013,characteristics of mesocyclone products were statistically analyzed.Characteristics and structures of mesocyclones that last three volume scans or more were also analyzed.The results show that mesocyclones often appear under the condition of high CAPE and strong wind shear,and mainly occur in June and July and from afternoon to the first half of the night.The results also show that the characteristics of the mesocyclone base,top and maximum shear were similar to that of mesocyclones in central Europe.High-centroid mesocyclones are favorable for the generation of hails,while low-centroid mesocyclones favor the generation of tornadoes.

关 键 词：中气旋特征 强对流天气 底高顶高 最强切变 

分 类 号：P415.2[天文地球—大气科学及气象学] P466