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doi:  10.12013/qxyjzyj2021-006
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
摘要点击 994  全文点击 480  投稿时间:2020-11-20  修订日期:2021-02-11
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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”.
中文关键词:  TRMM卫星,LIS,雷电监测定位网,地闪
英文关键词:  TRMM satellite  LIS  lightning monitoring positioning network  ground to ground flashes (CGs)
        
作者中文名作者英文名单位
杨钢Yang Gang吉安县气象局
赖晨Lai Chen江西省大气探测技术中心
支树林Zhi Shulin江西省气象台
引用:杨钢,赖晨,支树林.2021,基于TRMM卫星的江西省闪电时空分布特征[J].气象与减灾研究,44(1):42-50
中文摘要:
      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。
Abstract:
      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.
主办单位:江西省气象学会 单位地址:南昌市高新开发区艾溪湖二路323号
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