新余雷电天气影响系统与雷达回波产品分析  

Analysis of weather system impacting on thunderbolt and radar echo in Xinyu

作　　者：傅文兵[1] 肖云 马中元[3] 颜冰[1] 

机构地区：[1]江西省气象科技服务中心,南昌330046 [2]江西省新余市气象局,新余338025 [3]江西省气象科学研究所,南昌330046

出　　处：《气象水文海洋仪器》2010年第3期51-55,共5页Meteorological,Hydrological and Marine Instruments

基　　金：江西省气象科技创新基金<新余市强雷电预警预报研究>(GCX(2007)02);<利用多普勒雷达产品进行风暴外推与预警>(GCX200909);江西省气象局重点科研项目<多普勒雷达数据质量自动控制研究>(JXQX2008Z04)共同资助

摘　　要：利用常规天气图资料、地面观测资料、南昌多普勒天气雷达资料和闪电定位资料,对2004—2008年新余雷电过程的气候概况、天气影响系统和雷达回波产品等进行研究分析,结果表明:(1)新余雷电具有明显月分布特征,主要集中在7—8月;雷电的日变化主要集中在13:00—20:00,17:00出现次数最多,而夜间到上午则很少出现。(2)有利于新余发生雷电的天气影响系统有:地面冷锋和西南倒槽、高空低槽和切变线、低空急流和副热带高压。(3)南昌站单站有利于产生雷电天气的物理量参数有10个,满足其中5个以上就有可能出现雷电天气。(4)雷电天气的雷达回波产品主要有:回波顶高度ET,基本反射率CR,垂直积分液态水含量VIL。(5)雷电天气预警信号的发布标准有3种:一般雷电发布雷电黄色预警信号;较强雷电发布雷电橙色预警信号;强雷电发布雷电红色预警信号。By means of synoptic chart,ground observation,Nanchang Doppler radar and lightning location data,this paper analyses climate situation,weather system and radar echo during lightning process in Xinyu from 2004 to 2008.The results demonstrate that （1） the lightning have obvious characteristics of monthly distribution that mainly concentrated in July and August;the daily variation of lightning focuses on 13 to 20 o’clock that the maximum occurrence is at 17 o’clock and the minimum occurrence is from night to morning.（2） The weather that easily caused lightning in Xinyu includes ground cold and southwest reverse trough,upper trough and shear line,low-level jet stream and subtropical high pressure.（3） There are ten physical parameters that induced lightning at Nanchang station.If five of those parameters appeared,there will probably cause lightning.（4） The radar echo of lightning weather includes echo top（ET）,basic reflectivity （CR）,and vertical integration water volume（VIL）.（5） There are three kinds of standards for lightning alert signals,that are yellow alert signals for general lightning,orange alert signals for relatively strong lightning and red alert signals for strong lightning.

关 键 词：雷电气候概况 天气系统 物理量参数 雷达回波参数 

分 类 号：P457.9[天文地球—大气科学及气象学]