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On the Accuracy of Ray-Theory Methods to Determine the Altitudes of Intracloud Electric Discharges and Ionospheric Reflections: Application to Narrow Bipolar Events

Li, Dongshuai and Liu, Feifan and Pérez-Invernón, Francisco J. and Lu, Gaopeng and Qin, Zilong and Zhu, Baoyou and 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), pp. 1-10. Wiley. doi: 10.1029/2019JD032099. ISSN 2169-897X.

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Official URL: https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019JD032099

Abstract

Abstract 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, https://doi.org/10.1029/1998JD200045; 2004, https://doi.org/10.1029/2002RS002790) 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.

Item URL in elib:https://elib.dlr.de/140757/
Document Type:Article
Additional Information:e2019JD032099 10.1029/2019JD032099
Title:On the Accuracy of Ray-Theory Methods to Determine the Altitudes of Intracloud Electric Discharges and Ionospheric Reflections: Application to Narrow Bipolar Events
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Li, DongshuaiCSIC, Granada, Spainhttps://orcid.org/0000-0002-9858-3042UNSPECIFIED
Liu, FeifanCAS Univ. of Science and Technology of China, Hefei, Chinahttps://orcid.org/0000-0002-2932-8515UNSPECIFIED
Pérez-Invernón, Francisco J.DLR, IPAhttps://orcid.org/0000-0003-4523-0144UNSPECIFIED
Lu, GaopengCAS Univ. of Science and Technology of China, Hefei, Chinahttps://orcid.org/0000-0003-4523-0144UNSPECIFIED
Qin, ZilongShenzhen Institute of Meteorological Innovation, Shenzhen, Chinahttps://orcid.org/0000-0001-7499-355XUNSPECIFIED
Zhu, BaoyouCAS Univ. of Science and Technology of China, Hefei, ChinaUNSPECIFIEDUNSPECIFIED
Luque, AlejandroCSIC, Granada, Spainhttps://orcid.org/0000-0002-7922-8627UNSPECIFIED
Date:27 April 2020
Journal or Publication Title:Journal of Geophysical Research: Atmospheres
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:125
DOI:10.1029/2019JD032099
Page Range:pp. 1-10
Publisher:Wiley
ISSN:2169-897X
Status:Published
Keywords:finite-difference time domain (FDTD), narrow bipolar events (NBEs), Earth-Ionosphere WaveGuide (EIWG), VLF/LF
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication and Navigation
DLR - Research area:Raumfahrt
DLR - Program:R KN - Kommunikation und Navigation
DLR - Research theme (Project):R - Vorhaben Ionosphäre (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Perez-Invernon, Francisco Javier
Deposited On:08 Feb 2021 08:32
Last Modified:28 Feb 2023 14:55

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