Repozitorij Univerze v Novi Gorici

Izpis gradiva
A+ | A- | SLO | ENG

Naslov:Observations of the origin of downward terrestrial gamma-ray flashes
Avtorji:Belz, J. W. (Avtor)
Krehbiel, P. R. (Avtor)
Remington, J. (Avtor)
Stanley, M. A. (Avtor)
Abbasi, R. U. (Avtor)
LeVon, R. (Avtor)
Rison, W. (Avtor)
Rodeheffer, D. (Avtor)
Abu-Zayyad, T. (Avtor)
Lundquist, Jon Paul (Avtor)
Datoteke:URL https://doi.org/10.1029/2019JD031940
 
Jezik:Angleški jezik
Vrsta gradiva:Neznano ()
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:UNG - Univerza v Novi Gorici
Opis: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.
Ključne besede:terrestrial gamma-ray flashes, lightning, fast breakdown, initial breakdown pulse, atmospheric electricity, transient conducting events
Leto izida:2020
Št. strani:str. 1-36
Številčenje:no. 23, Vol. 125
COBISS_ID:50284291 Povezava se odpre v novem oknu
UDK:53
ISSN pri članku:2169-8996
URN:URN:SI:UNG:REP:YQHCIQD8
DOI:10.1029/2019JD031940 Povezava se odpre v novem oknu
Število ogledov:467
Število prenosov:2
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
Področja:Gradivo ni uvrščeno v področja.
:
  
Skupna ocena:(0 glasov)
Vaša ocena:Ocenjevanje je dovoljeno samo prijavljenim uporabnikom.

Postavite miškin kazalec na naslov za izpis povzetka. Klik na naslov izpiše podrobnosti ali sproži prenos.

Gradivo je del revije

Naslov:Journal of geophysical research
Skrajšan naslov:J. geophys. res., Atmos.
Založnik:John Wiley & Sons
ISSN:2169-8996
COBISS.SI-ID:310441 Novo okno

Nazaj