基于TRMM卫星的江西省闪电时空分布特征  

Temporal and Spatial Distribution Characteristics of Lightning in Jiangxi Province Based on TRMM Satellite

作　　者：杨钢 赖晨 支树林 Yang Gang;Lai Chen;Zhi Shulin(Jiangxi Ji an Meteorological Bureau of Jiangxi Province,Ji an 343000,China;Jiangxi Atmosphere Detection Technology Center,Nanchang 330096,China;Jiangxi Meteorological Observatory,Nanchang 330096,China)

机构地区：[1]吉安县气象局,江西吉安343100 [2]江西省大气探测技术中心,江西南昌330096 [3]江西省气象台,江西南昌330096

出　　处：《气象与减灾研究》2021年第1期42-50,共9页Meteorology and Disaster Reduction Research

基　　金：2019年江西省气象局面上项目“双偏振雷达探测性能及应用能力评估”.

摘　　要：TRMM卫星闪电资料的优势在于从高空探测闪电活动,能在一定程度上反映对流云中上层的对流影响过程。利用2004-2014年TRMM卫星LIS闪电数据和江西省雷电监测定位网闪电数据对江西省境内闪电活动的时空分布特征进行了分析,并比较了两种数据之间的差异。江西省闪电活动年差异较大,季节变化明显,闪电发生高峰值为低峰值两倍多,高发期为6-9月,在该时段闪电活动多集中于午后到前半夜发生。闪电活动局地性很强,多发于江西省山地与地势较低的过渡带,正地闪高发区集中在江西省中部的偏东地区。对流有效位能(CAPE)高值区与闪电密度大值区对应,表明前者对闪电活跃区有较好的指示作用。江西省闪电时空分布与地形地势、大气环流、水热条件等诸多因素有关,卫星和地面数据之间也存在一些差异。TRMM satellite lightning data can be used to detect lightning activity from high altitude,and partly reflect the convective influence processes in the upper layers of convective clouds.Based on the lightning data of TRMM satellite LIS and Jiangxi lightning monitoring and positioning network from 2004 to 2014,the temporal and spatial distribution characteristics of lightning activities in Jiangxi province were analyzed,and the differences between them were compared.The peak value of lightning was more than twice of the low peak value,and the high incidence period was from June to September.In this period,lightning activities were mostly concentrated in the afternoon to the first half of the night.The lightning activity occurred locally and mostly in the transition zone between mountain and low terrain in Jiangxi province.The high incidence area of positive ground lightning was concentrated in the east of central Jiangxi province.The high value area of CAPE corresponded to that of lightning density,indicating the former has a good indication of lightning active area.The results showed that the temporal and spatial distribution of lightning in Jiangxi province was related to many factors such as topography,atmospheric circulation,water and heat conditions,and there were some differences between satellite and ground data.

关 键 词：TRMM卫星 LIS 雷电监测定位网 地闪 

分 类 号：P414.4[天文地球—大气科学及气象学]