Observations of the Origin of Downward Terrestrial Gamma‐Ray Flashes
J. W. Belz
1
,
Paul R. Krehbiel
2
,
J. REMINGTON
1
,
MARK STANLEY
2
,
R. U. Abbasi
3
,
R Levon
1
,
W Rison
2
,
D. Rodeheffer
2
,
T. Abu-Zayyad
1
,
M. ALLEN
1
,
E. BARCIKOWSKI
1
,
D. R. Bergman
1
,
S. A. BLAKE
1
,
M. Byrne
1
,
R. CADY
1
,
B. G. CHEON
4
,
M. CHIKAWA
5
,
A. DI MATTEO
6, 7
,
T. Fujii
8
,
K. Fujita
9
,
R. FUJIWARA
9
,
M. FUkUSHIMA
10, 11
,
G. FURLICH
1
,
W. HANLON
1
,
M. Hayashi
12
,
Y. Hayashi
9
,
N. HAYASHIDA
13
,
K. Hibino
13
,
K. HONDA
14
,
D. IKEDA
14
,
T. Inadomi
15
,
N. INOUE
16
,
T. Ishii
14
,
H. Ito
17
,
D. Ivanov
1
,
H. Iwakura
15
,
H. M. Jeong
18
,
S. Jeong
18
,
C. C. H. Jui
1
,
K. KADOTA
19
,
F. KAKIMOTO
20
,
O. Kalashev
21
,
K. KASAHARA
22
,
S. Kasami
23
,
H. Kawai
24
,
S. Kawakami
9
,
K. Kawata
10
,
E. Kido
10
,
H. B. Kim
4
,
J H Kim
1
,
J H Kim
9
,
V. KUZMIN
21
,
M. K. Kuznetsov
6, 21
,
M. Kuznetsov
6, 21
,
Y. J. Kwon
25
,
K H Lee
18
,
B. LUBSANDORZHIEV
21
,
J. P. LUNDQUIST
1
,
K Machida
14
,
H. Matsumiya
9
,
J. N. MATTHEWS
1
,
T Matuyama
9
,
R. MAYTA
9
,
M. MINAMINO
9
,
K. Mukai
14
,
I. MYERS
1
,
S. Nagataki
17
,
K. Nakai
9
,
R. Nakamura
15
,
T. Nakamura
26
,
Y. Nakamura
15
,
Y Nakamura
15
,
T. NONAKA
10
,
H. Oda
9
,
S. Ogio
9, 27
,
M. OHNISHI
10
,
H. OHOKA
10
,
Y. Oku
23
,
T. Okuda
28
,
Y. Omura
9
,
Masaomi Ono
17
,
M. Ono
17
,
A. OSHIMA
29
,
S. OZAWA
22
,
I. H. PARK
18
,
M Potts
1
,
M. S. PSHIRKOV
21, 30
,
D. C. RODRIGUEZ
1
,
G. Rubtsov
21
,
D. RYU
31
,
H. Sagawa
10
,
R. SAHARA
9
,
K. SAITO
10
,
Y. Saito
15
,
N. SAKAKI
10
,
T. SAKO
10
,
N. SAKURAI
9
,
Kei Sano
15
,
K. Sano
15
,
T. Seki
15
,
K. SEKINO
9
,
F. SHIBATA
14
,
T Shibata
10
,
H. SHIMODAIRA
10
,
B. K. SHIN
9
,
H. S. Shin
10
,
J. D. Smith
1
,
Pierre Sokolsky
1
,
P. Sokolsky
1
,
N. Sone
15
,
B. T. Stokes
1
,
T. A. STROMAN
1
,
Y. Takagi
9
,
Y. TAKAHASHI
9
,
M. Takeda
10
,
R. TAKEISHI
18
,
A. TAKETA
32
,
M. TAKITA
10
,
Y. Tameda
23
,
K Tanaka
33
,
Masayuki Tanaka
34
,
Y. TANOUE
9
,
S. B. Thomas
1
,
G. B. THOMSON
1
,
P. TINYAKOV
6, 21
,
I. Tkachev
21
,
H. Tokuno
20
,
T. TOMIDA
15
,
S. Troitsky
21
,
Y. TSUNESADA
9, 27
,
Y. UCHIHORI
35
,
S. UDO
13
,
T. Uehama
15
,
F. URBAN
36
,
M Wallace
1
,
T. Wong
1
,
M. Yamamoto
15
,
H. Yamaoka
34
,
K. Yamazaki
29
,
K. Yashiro
37
,
M. Yosei
23
,
H. YOSHII
38
,
Y. ZHEZHER
10, 21
,
Z. ZUNDEL
1
4
12
14
27
31
Тип публикации: Journal Article
Дата публикации: 2020-10-05
scimago Q1
wos Q2
БС1
SJR: 1.545
CiteScore: 6.7
Impact factor: 3.4
ISSN: 2169897X, 21698996
Space and Planetary Science
Earth and Planetary Sciences (miscellaneous)
Atmospheric Science
Geophysics
Краткое описание
In this paper we report the first close, high-resolution observations of downward-directed terrestrial gamma-ray flashes (TGFs) detected by the large-area Telescope Array cosmic ray observatory, obtained in conjunction with broadband VHF interferometer and fast electric field change measurements of the parent discharge. The results show that the TGFs occur during strong initial breakdown pulses (IBPs) in the first few milliseconds of negative cloud-to-ground and low-altitude intracloud flashes, and that the IBPs are produced by a newly-identified streamer-based discharge process called fast negative breakdown. The observations indicate the relativistic runaway electron avalanches (RREAs) responsible for producing the TGFs are initiated by embedded spark-like transient conducting events (TCEs) within the fast streamer system, and potentially also by individual fast streamers themselves. The TCEs are inferred to be the cause of impulsive sub-pulses that are characteristic features of classic IBP sferics. Additional development of the avalanches would be facilitated by the enhanced electric field ahead of the advancing front of the fast negative breakdown. In addition to showing the nature of IBPs and their enigmatic sub-pulses, the observations also provide a possible explanation for the unsolved question of how the streamer to leader transition occurs during the initial negative breakdown, namely as a result of strong currents flowing in the final stage of successive IBPs, extending backward through both the IBP itself and the negative streamer breakdown preceding the IBP.
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Belz J. W. et al. Observations of the Origin of Downward Terrestrial Gamma‐Ray Flashes // Journal of Geophysical Research Atmospheres. 2020. Vol. 125. No. 23.
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Belz J. W. et al. Observations of the Origin of Downward Terrestrial Gamma‐Ray Flashes // Journal of Geophysical Research Atmospheres. 2020. Vol. 125. No. 23.
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@article{2020_Belz,
author = {J. W. Belz and Paul R. Krehbiel and J. REMINGTON and MARK STANLEY and R. U. Abbasi and R Levon and W Rison and D. Rodeheffer and T. Abu-Zayyad and M. ALLEN and E. BARCIKOWSKI and D. R. Bergman and S. A. BLAKE and M. Byrne and R. CADY and B. G. CHEON and M. CHIKAWA and A. DI MATTEO and T. Fujii and K. Fujita and R. FUJIWARA and M. FUkUSHIMA and G. FURLICH and W. HANLON and M. Hayashi and Y. Hayashi and N. HAYASHIDA and K. Hibino and K. HONDA and D. IKEDA and T. Inadomi and N. INOUE and T. Ishii and H. Ito and D. Ivanov and H. Iwakura and H. M. Jeong and S. Jeong and C. C. H. Jui and K. KADOTA and F. KAKIMOTO and O. Kalashev and K. KASAHARA and S. Kasami and H. Kawai and S. Kawakami and K. Kawata and E. Kido and H. B. Kim and J H Kim and others},
title = {Observations of the Origin of Downward Terrestrial Gamma‐Ray Flashes},
journal = {Journal of Geophysical Research Atmospheres},
year = {2020},
volume = {125},
publisher = {American Geophysical Union},
month = {oct},
url = {https://doi.org/10.1029/2019jd031940},
number = {23},
doi = {10.1029/2019jd031940}
}