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On the terrestrial gamma-ray flashes preceding narrow bipolar events

Narrow bipolar events (NBEs) are occasionally reported to occur within a few ms after Terrestrial Gamma-ray Flashes (TGFs), while the formation mechanism remains mysterious partially due to the lack of sufficient observations. Here, nine more TGFs of this scenario are reported with concurrent LF sfe...

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Main Authors: Lu, Gaopeng, Zhang, Hongbo, Qie, Xiushu, Xian, Tao, Yang, Jing, Liu, Feifan, Zhu, Baoyou, Lyu, Fanchao, Xiong, Shaolin, Yi, Qibin, Ahmad, Mohd Riduan, Li, Dongshuai, Pu, Yunjiao, Cummer, Steven A., Briggs, Michael S.
Format: Article
Language:English
Published: Blackwell Publishing Ltd 2021
Online Access:http://eprints.utem.edu.my/id/eprint/25832/2/GRL_2021_ZHANG_LU_LYU_COMPRESSED.PDF
http://eprints.utem.edu.my/id/eprint/25832/
https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2020GL092160
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spelling my.utem.eprints.258322023-06-02T12:49:13Z http://eprints.utem.edu.my/id/eprint/25832/ On the terrestrial gamma-ray flashes preceding narrow bipolar events Lu, Gaopeng Zhang, Hongbo Qie, Xiushu Xian, Tao Yang, Jing Liu, Feifan Zhu, Baoyou Lyu, Fanchao Xiong, Shaolin Yi, Qibin Ahmad, Mohd Riduan Li, Dongshuai Pu, Yunjiao Cummer, Steven A. Briggs, Michael S. Narrow bipolar events (NBEs) are occasionally reported to occur within a few ms after Terrestrial Gamma-ray Flashes (TGFs), while the formation mechanism remains mysterious partially due to the lack of sufficient observations. Here, nine more TGFs of this scenario are reported with concurrent LF sferics and lightning location data. The gamma-ray production in these TGFs preceded the occurrence of NBEs by a minimum of 60 µs up to 13.5 ms, and no other fast leader discharge was found within 20 ms before the TGF. The TGF-preceded positive NBEs occurred at altitudes of 8.6–11 km in thunderstorms, likely in the high electric field (E-field) region of lightning initiation. The analyses show that the NBE-preceding TGFs bear harder energy spectrum with larger proportion of high-energy photons than EIP-related TGFs produced in association with lightning leader. Our findings support the relativistic feedback mechanism of gamma-ray generation in the large-scale thunderstorm E-field. Blackwell Publishing Ltd 2021-04 Article PeerReviewed text en http://eprints.utem.edu.my/id/eprint/25832/2/GRL_2021_ZHANG_LU_LYU_COMPRESSED.PDF Lu, Gaopeng and Zhang, Hongbo and Qie, Xiushu and Xian, Tao and Yang, Jing and Liu, Feifan and Zhu, Baoyou and Lyu, Fanchao and Xiong, Shaolin and Yi, Qibin and Ahmad, Mohd Riduan and Li, Dongshuai and Pu, Yunjiao and Cummer, Steven A. and Briggs, Michael S. (2021) On the terrestrial gamma-ray flashes preceding narrow bipolar events. Geophysical Research Letters, 48 (8). pp. 1-12. ISSN 0094-8276 https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2020GL092160 10.1029/2020GL092160
institution Universiti Teknikal Malaysia Melaka
building UTEM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknikal Malaysia Melaka
content_source UTEM Institutional Repository
url_provider http://eprints.utem.edu.my/
language English
description Narrow bipolar events (NBEs) are occasionally reported to occur within a few ms after Terrestrial Gamma-ray Flashes (TGFs), while the formation mechanism remains mysterious partially due to the lack of sufficient observations. Here, nine more TGFs of this scenario are reported with concurrent LF sferics and lightning location data. The gamma-ray production in these TGFs preceded the occurrence of NBEs by a minimum of 60 µs up to 13.5 ms, and no other fast leader discharge was found within 20 ms before the TGF. The TGF-preceded positive NBEs occurred at altitudes of 8.6–11 km in thunderstorms, likely in the high electric field (E-field) region of lightning initiation. The analyses show that the NBE-preceding TGFs bear harder energy spectrum with larger proportion of high-energy photons than EIP-related TGFs produced in association with lightning leader. Our findings support the relativistic feedback mechanism of gamma-ray generation in the large-scale thunderstorm E-field.
format Article
author Lu, Gaopeng
Zhang, Hongbo
Qie, Xiushu
Xian, Tao
Yang, Jing
Liu, Feifan
Zhu, Baoyou
Lyu, Fanchao
Xiong, Shaolin
Yi, Qibin
Ahmad, Mohd Riduan
Li, Dongshuai
Pu, Yunjiao
Cummer, Steven A.
Briggs, Michael S.
spellingShingle Lu, Gaopeng
Zhang, Hongbo
Qie, Xiushu
Xian, Tao
Yang, Jing
Liu, Feifan
Zhu, Baoyou
Lyu, Fanchao
Xiong, Shaolin
Yi, Qibin
Ahmad, Mohd Riduan
Li, Dongshuai
Pu, Yunjiao
Cummer, Steven A.
Briggs, Michael S.
On the terrestrial gamma-ray flashes preceding narrow bipolar events
author_facet Lu, Gaopeng
Zhang, Hongbo
Qie, Xiushu
Xian, Tao
Yang, Jing
Liu, Feifan
Zhu, Baoyou
Lyu, Fanchao
Xiong, Shaolin
Yi, Qibin
Ahmad, Mohd Riduan
Li, Dongshuai
Pu, Yunjiao
Cummer, Steven A.
Briggs, Michael S.
author_sort Lu, Gaopeng
title On the terrestrial gamma-ray flashes preceding narrow bipolar events
title_short On the terrestrial gamma-ray flashes preceding narrow bipolar events
title_full On the terrestrial gamma-ray flashes preceding narrow bipolar events
title_fullStr On the terrestrial gamma-ray flashes preceding narrow bipolar events
title_full_unstemmed On the terrestrial gamma-ray flashes preceding narrow bipolar events
title_sort on the terrestrial gamma-ray flashes preceding narrow bipolar events
publisher Blackwell Publishing Ltd
publishDate 2021
url http://eprints.utem.edu.my/id/eprint/25832/2/GRL_2021_ZHANG_LU_LYU_COMPRESSED.PDF
http://eprints.utem.edu.my/id/eprint/25832/
https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2020GL092160
_version_ 1768012365765279744
score 13.211869

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