The initial stage of cloud lightning imaged in high‐resolution

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F21%3A00538858" target="_blank" >RIV/68378289:_____/21:00538858 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/21:10439648

Výsledek na webu

<a href="https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2020JD033126" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2020JD033126</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1029/2020JD033126" target="_blank" >10.1029/2020JD033126</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The initial stage of cloud lightning imaged in high‐resolution

Popis výsledku v původním jazyce

With LOFAR we have been able to image the development of lightning flashes with meter‐scale accuracy and unprecedented detail. We discuss the primary steps behind our most recent lightning imaging method. To demonstrate the capabilities of our technique we show and interpret images of the first few milliseconds of two intra‐cloud flashes. In all our flashes the negative leaders propagate in the charge layer below the main negative charge. Among several interesting features we show that in about 2 ms after initiation the Primary Initial Leader triggers the formation of a multitude (more than ten) negative leaders in a rather confined area of the atmosphere. From these only one or two continue to propagate after about 30 ms to extend over kilometers horizontally while another may propagate back to the initiation point. We also show that normal negative leaders can transition into an initial‐leader like state, potentially in the presence of strong electric fields. In addition, we show some initial breakdown pulses that occurred during the primary initial leader, and even during two ”secondary” initial leaders that developed out of stepped leaders.

Název v anglickém jazyce

The initial stage of cloud lightning imaged in high‐resolution

Popis výsledku anglicky

With LOFAR we have been able to image the development of lightning flashes with meter‐scale accuracy and unprecedented detail. We discuss the primary steps behind our most recent lightning imaging method. To demonstrate the capabilities of our technique we show and interpret images of the first few milliseconds of two intra‐cloud flashes. In all our flashes the negative leaders propagate in the charge layer below the main negative charge. Among several interesting features we show that in about 2 ms after initiation the Primary Initial Leader triggers the formation of a multitude (more than ten) negative leaders in a rather confined area of the atmosphere. From these only one or two continue to propagate after about 30 ms to extend over kilometers horizontally while another may propagate back to the initiation point. We also show that normal negative leaders can transition into an initial‐leader like state, potentially in the presence of strong electric fields. In addition, we show some initial breakdown pulses that occurred during the primary initial leader, and even during two ”secondary” initial leaders that developed out of stepped leaders.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/GA20-09671S" target="_blank" >GA20-09671S: Výzkum bleskových výbojů na velkých i malých škálách</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Geophysical Research-Atmospheres

ISSN

2169-897X

e-ISSN

2169-8996

Svazek periodika

126

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

19

Strana od-do

e2020JD033126

Kód UT WoS článku

000624348900019

EID výsledku v databázi Scopus

2-s2.0-85101778774