闽北春季冰雹CINRAD雷达产品特征分析  

Characteristics of CINRAD radar products for spring hail in North Fujian

作　　者：彭建东 张丽凡[2] 黄待静 Peng Jiandong;Zhang Lifan;Huang Daijing(Nanping Meteorological Bureau,Nanping Fujian 353000;Jianou Meteorological Bureau,Jianou Fujian 353100)

机构地区：[1]南平市气象局,福建南平353000 [2]建瓯市气象局,福建建瓯353100

出　　处：《气象研究与应用》2018年第3期48-52,共5页Journal of Meteorological Research and Application

摘　　要：利用建阳新一代天气雷达特征参数资料,结合常规探空资料和实况资料,对近6a(2008~2013)闽北春季(3~6月)地面降雹出现前垂直积分液态含水量(VIL)的演变特征、强中心高度(Ht)、风暴顶高(TOP)和组合反射率强度(CR)临界值进行统计分析发现:降雹前,94%的雹云单体的VIL出现了"跃增"现象,1个体扫时间△VIL≥12kg?m^(-2),且跃增后的VIL≥31kg?m^(-2),VIL跃增时间提前量△T平均为5.7个体扫时间;降雹前6min内总样本的Ht平均值高度陡降了1.4km,所有的小冰雹降雹前VIL都只有一次跃增,降雹前VIL多次跃增的,冰雹直径都较大。Based on the characteristic parameters of Jianyang new generation weather radar, combined with conventional sounding data and observation data, the evolution characteristics of vertical integrated liquid water content （VIL）, strong center height （Ht）, storm top height （TOP）, and combined reflectance intensity （CR） threshold before the occurrence of spring （March- June） hail in North Fujian in recent 6 years （2008-2013） were studied. The results showed that the VIL of 94% hail cloud monomers had a significant ＂jump＂ phenomenon, in a datum time, △ VIL ≥12 kg. m-2, and after jumping the VIL ≥31 kg. m -2, the average advance time （△T） of VIL jump was 5.7 datum time. Six minutes before hailing, the Ht average height of the total sample dramatically declined 1.4 kin. There was only a jump of the VlL before small hailing, when the VIL has many jumps before hailing, the hail diameter is generally large.

关 键 词：闽北 冰雹 雷达特征参数 

分 类 号：P49[天文地球—大气科学及气象学]