The Relationship of Lightning Radio Pulse Amplitudes and Source Altitudes as Observed by LOFAR.
LOFAR
altitude
amplitude
lightning
pulse detection
radio astronomy
Journal
Earth and space science (Hoboken, N.J.)
ISSN: 2333-5084
Titre abrégé: Earth Space Sci
Pays: United States
ID NLM: 101696171
Informations de publication
Date de publication:
Apr 2022
Apr 2022
Historique:
received:
10
08
2021
revised:
22
09
2021
accepted:
12
10
2021
entrez:
22
7
2022
pubmed:
23
7
2022
medline:
23
7
2022
Statut:
ppublish
Résumé
When a lightning flash is propagating in the atmosphere it is known that especially the negative leaders emit a large number of very high frequency (VHF) radio pulses. It is thought that this is due to streamer activity at the tip of the growing negative leader. In this work, we have investigated the dependence of the strength of this VHF emission on the altitude of such emission for two lightning flashes as observed by the Low Frequency ARray (LOFAR) radio telescope. We find for these two flashes that the extracted amplitude distributions are consistent with a power-law, and that the amplitude of the radio emissions decreases very strongly with source altitude, by more than a factor of 2 from 1 km altitude up to 5 km altitude. In addition, we do not find any dependence on the extracted power-law with altitude, and that the extracted power-law slope has an average around 3, for both flashes.
Identifiants
pubmed: 35865721
doi: 10.1029/2021EA001958
pii: ESS2993
pmc: PMC9286657
doi:
Types de publication
Journal Article
Langues
eng
Pagination
e2021EA001958Informations de copyright
© 2021 The Authors.
Références
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pubmed: 27867785
Nature. 2019 Apr;568(7752):360-363
pubmed: 30996312
Phys Rev Lett. 2020 Mar 13;124(10):105101
pubmed: 32216418
Earth Space Sci. 2022 Apr;9(4):e2021EA001958
pubmed: 35865721