Latitudinal distribution and propagation of lightning-generated whistler:A statistical study by Van Allen Probes observation and ray-tracing simulation  

作　　者：Zhaoguo HE Jiang YU Xiangling DING Zuzheng CHEN Nigang LIU Yuguang YE Jun CUI Qiugang ZONG 

机构地区：[1]State Key Laboratory of Lunar and Planetary Sciences,Macao University of Science and Technology,Macao,999078,China [2]CNSA Macao Center for Space Exploration and Science,Macao,999078,China [3]Zhuhai MUST Science and Technology Research Institute,Macao University of Science and Technology,Zhuhai,519000,China [4]Planetary Environmental and Astrobiological Research Laboratory(PEARL),School of Atmospheric Sciences,Sun Yat-sen University,Zhuhai,519000,China [5]Institute of Space Physics and Applied Technology,Peking University,Beijing,100871,China

出　　处：《Science China Earth Sciences》2025年第4期1291-1297,共7页中国科学(地球科学英文版)

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.42422406,42174185,42474209);the Science and Technology Development Fund,Macao SAR(Grant Nos.0042/2024/RIA1,0176/2023/RIA3,0008/2024/AKP and 002/2024/SKL);the Guangdong Basic and Applied Basic Research Foundation(Grant No.2024A1515012093)。

摘　　要：Lightning-generated whistler(LGW)is an important electromagnetic wave in the magnetosphere,causing energetic electron losses.Here we analyze the LGW distribution and propagation using Van Allen Probes data and ray-tracing simulation.The statistics show that LGW occurs more frequently at L<2.5 with higher amplitudes in the northern hemisphere.The Poynting flux demonstrates that LGW originates from both hemispheres within L~2.5,and propagates into the space as the wave power decays.The wave normal angle distributions indicate that LGW propagates quasi-parallel to the field line near its source and becomes oblique as the magnetic latitude decreases.Furthermore,we use the ray-tracing model to simulate the LGW propagation,and statistically analyze the propagation characteristics of LGW,which are consistent with the observational data.This paper presents the latitudinal distribution and propagation properties of LGW based on statistics for the first time,providing new insights into the LGW generation and evolution in the magnetosphere.

关 键 词：Lightning-generated whistler Ray-tracing model Magnetosphere Wave distribution Wave propagation 

分 类 号：P352[天文地球—空间物理学]