武汉天河国际机场2023年入梅强降水过程闪电特征  

Analysis of Lightning Characteristics During Heavy Rainfall in 2023 at Wuhan Tianhe International Airport

作　　者：陈炜 王清龙 成勤 姚润 Chen Wei;Wang Qinglong;Cheng Qin;Yao Run(Hubei Branch of the Civil Aviation Administration of China's Central and Southern Regions,Wuhan 430302,Hubei,China;Three Gorges National Climate Observatory,Yichang 443000,Hubei,China;Yichang Weather Bureau,Yichang,Hubei 443000,Hubei,China;Changyang Tujia Autonomous County Weather Bureau,Changyang 443599,Hubei,China)

机构地区：[1]中国民用航空中南地区空中交通管理局湖北分局,湖北武汉430302 [2]三峡国家气候观象台,湖北宜昌443000 [3]宜昌市气象局,湖北宜昌443000 [4]湖北省长阳土家族自治县气象局,湖北长阳443599

出　　处：《绿色科技》2024年第22期20-25,30,共7页Journal of Green Science and Technology

基　　金：湖北省自然科学基金气象创新发展联合基金项目(编号:2023AFD106);湖北省气象局科技发展基金项目(编号:2023Y13)。

摘　　要：利用FY-4A卫星闪电成像仪LMI、地基闪电ADTD数据、雷达回波数据和ERA5再分析资料等,以2023年6月18日湖北省入梅强降水过程为例,对武汉天河国际机场附近50 km范围内对流云团闪电特征进行了分析。结果表明:①本次过程受低槽发展、低涡东移、中低层切变线和暖低压发展共同影响,天气形势和环境条件均有利于闪电等对流天气发生;②云地之间闪电活跃时段可分为三个阶段,均以负极性为主;③第一、第三阶段的雷电流强度、陡度分布较集中,第二阶段分布相对均匀;第三阶段的闪击次数最多,但雷电流幅值、陡度均最小;④第一阶段对流云团和闪电自南向北、自西向东汇合发展,机场西部的闪电密度最大;第二阶段强回波向东北方向移动,闪电密集区位于机场西北部的孝南区北部;第三阶段对流单体活跃、分散,造成的闪电持续时间长、影响范围大,造成多个核密度中心;⑤FY-4A探测的TBB低值区与云地闪电位置一致性好,探测的闪电密集区主要在机场的东北部、东部和南部。二者结合可以为制定科学的决策信息提供依据。Using the FY-4A satellite lightning imager LMI,ground-based lightning ADTD data,radar echo data and ERA5 reanalysis data,taking the first heavy rainfall process in Hubei during plum rain season on June 18,2023 as an example,the 50km range near Hubei Tianhe International Airport was analyzed.The lightning characteristics of internal convective clouds were analyzed.The results showed that:①this process was jointly affected by the development of the trough,the eastward movement of the low vortex,the mid-and low-level shear lines,and the development of warm low pressure.The weather situation and environmental conditions are conducive to the occurrence of convective weather such as thunder and lightning;②the active lightning period could be divided into three stages,all of which were dominated by negative polarity;③the distribution of lightning current intensity and steepness in the first and third stages was relatively concentrated,while the distribution in the second stage was relatively uniform;the third stage had the largest number of lightning strikes,but the lightning current amplitude and steepness were the smallest;④in the first stage,convective clouds and lightning converge converged from south to north and from west to east,with the density of lightning in the west of the airport being the highest.In the second stage,the strong echo moved northeastward,and the lightning intensive area was located in the northern part of Xiaonan District,northwest of the airport.In the third stage,convective cells were active and dispersed,resulting in a long duration of lightning,a large range of influence and multiple nuclear density centers;⑤the dense cloud flash areas detected by FY-4A were mainly in the northeast,east and south of Tianhe International Airport.The combination of the two can provide a basis for formulating scientific decision.

关 键 词：ADTD闪电系统 FY-4A闪电成像仪 强对流 雷达回波 云顶亮温TBB 

分 类 号：P426.62[天文地球—大气科学及气象学]