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DOI | 10.1029/2019JD032099 |
On the Accuracy of Ray-Theory Methods to Determine the Altitudes of Intracloud Electric Discharges and Ionospheric Reflections: Application to Narrow Bipolar Events | |
Li, Dongshuai1; Liu, Feifan2; Perez-Invernon, F. J.1,3; Lu, Gaopeng2,4; Qin, Zilong5; Zhu, Baoyou2; Luque, Alejandro1 | |
2020-05-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2020 |
卷号 | 125期号:9 |
文章类型 | Article |
语种 | 英语 |
国家 | Spain; Peoples R China; Germany |
英文摘要 | Narrow bipolar events (NBEs) (also called narrow bipolar pulses [NBPs] or compact intracloud discharges [CIDs]) are energetic intracloud discharges characterized by narrow bipolar electromagnetic waveforms identified from ground-based very low frequency (VLF)/low-frequency (LF) observations. The simplified ray-theory method proposed by Smith et al. (1999, ; 2004, ) is widely used to infer the altitude of intracloud lightning and the effective (or virtual) reflection height of the ionosphere from VLF/LF signals. However, due to the large amount of high-frequency components in NBEs, the propagation effect of the electromagnetic fields for NBEs at large distance depends nontrivially on the geometry and the effective conductivity of the Earth-ionosphere waveguide (EIWG). In this study, we investigate the propagation of NBEs by using a full-wave Finite-Difference Time-Domain (FDTD) approach. The simulated results are compared with ground-based measurements at different distances in Southern China, and we assess the accuracy of the simplified ray-theory method in estimating the altitude of the NBE source and the effective reflection height of the ionosphere. It is noted that the evaluated NBE altitudes have a slight difference of about +/- 1 km when compared with the full-wave FDTD results, while the evaluated ionospheric reflection heights are found to be bigger than those obtained from FDTD model by about 5 km. |
英文关键词 | finite-difference time domain (FDTD) narrow bipolar events (NBEs) Earth-Ionosphere WaveGuide (EIWG) VLF LF |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000536605500011 |
WOS关键词 | VLF-LF PROPAGATION ; RADIO-EMISSION ; WAVE-FORMS ; COMPUTATION ; RADIATION ; RECORDS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/280219 |
专题 | 气候变化 |
作者单位 | 1.CSIC, Inst Astrofis Andalucia IAA, Granada, Spain; 2.Univ Sci & Technol China, CAS Key Lab Geospace Environm, Sch Earth & Space Sci, Hefei, Peoples R China; 3.Deutsch Zentrum Luft & Raumfahrt, Inst Phys Atmosphare, Wessling, Germany; 4.Chinese Acad Sci, Inst Atmospher Phys, Key Lab Middle Atmosphere & Global Environm Obser, Beijing, Peoples R China; 5.Shenzhen Inst Meteorol Innovat, Guangdong Hongkong Macao Greater Bay Area Weather, Shenzhen, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Dongshuai,Liu, Feifan,Perez-Invernon, F. J.,et al. On the Accuracy of Ray-Theory Methods to Determine the Altitudes of Intracloud Electric Discharges and Ionospheric Reflections: Application to Narrow Bipolar Events[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2020,125(9). |
APA | Li, Dongshuai.,Liu, Feifan.,Perez-Invernon, F. J..,Lu, Gaopeng.,Qin, Zilong.,...&Luque, Alejandro.(2020).On the Accuracy of Ray-Theory Methods to Determine the Altitudes of Intracloud Electric Discharges and Ionospheric Reflections: Application to Narrow Bipolar Events.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,125(9). |
MLA | Li, Dongshuai,et al."On the Accuracy of Ray-Theory Methods to Determine the Altitudes of Intracloud Electric Discharges and Ionospheric Reflections: Application to Narrow Bipolar Events".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 125.9(2020). |
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