Development of a low-frequency magnetic lightning mapping system(LFM-LMS)in North China:validation and preliminary results  

作　　者：Xiao Li GaoPeng Lu FanChao Lyu HongBo Zhang Kainat Qamar RuBin Jiang 

机构地区：[1]School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,China [2]Key Laboratory of Atmospheric Optics,Anhui Institute of Optics and Fine Mechanics,HFIPS,Chinese Academy of Sciences,Hefei 230031,China [3]Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,Nanjing University of Information Science&Technology,Nanjing 210044,China [4]Key Laboratory of Transportation Meteorology of China Meteorological Administration,Nanjing Joint Institute for Atmospheric Sciences,Nanjing 210000,China [5]Key Laboratory for Middle Atmosphere and Global Environment Observation,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China

出　　处：《Earth and Planetary Physics》2023年第4期460-470,共11页地球与行星物理（英文版）

基　　金：the National Key R&D Program of China(2017YFC1501501);the CAS Project of Stable Support for Youth Team in Basic Research Field(YSRR-018);the Youth Innovation Fund project of the university(WK2080000172);the National Natural Science Foundation of China(41875006,U1938115);the Chinese Meridian Project;the International Partnership Program of Chinese Academy of Sciences(183311KYSB20200003).

摘　　要：A low-frequency magnetic lightning mapping system(LFM-LMS)was built during the SHAndong Triggered Lightning Experiment(SHATLE),based on continuous measurements of magnetic field radiation from lightning.The hardware and source-mapping techniques used by the LFM-LMS were introduced;both Monte Carlo simulations and the observation of rocket-triggered lightning examples were employed to examine the location accuracy and detection effectiveness of the LFM-LMS.We estimated that the system’s location accuracy about 100−200 m horizontally and~200 m vertically.A natural intra-cloud lightning flash and a rocket-triggered lightning flash,both with intricate structures and discharging processes,were examined using the three-dimensional mapping results.The progressing path of negative lightning leaders is usually well-defined,and its propagation speed is estimated to be(0.5−1.4)×10^(6)m/s.In summary,the LFM-LMS can reconstruct the three-dimensional morphology of lightning flashes;this technology provides a efficient method for investigating the characteristics of lightning development,as well as the overall electrical strucuture of thunderstorms.

关 键 词：rocket-triggered lightning low-frequency magnetic field lightning mapping observation location accuracy 

分 类 号：P427.3[天文地球—大气科学及气象学]