Two propagation scenarios of isolated breakdown lightning processes in failed negative cloud‐to‐ground flashes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F20%3A00534870" target="_blank" >RIV/68378289:_____/20:00534870 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/20:10423282

Výsledek na webu

<a href="https://oadoi.org/10.1029/2020GL090593" target="_blank" >https://oadoi.org/10.1029/2020GL090593</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1029/2020GL090593" target="_blank" >10.1029/2020GL090593</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Two propagation scenarios of isolated breakdown lightning processes in failed negative cloud‐to‐ground flashes

Popis výsledku v původním jazyce

Isolated breakdown process (also known as attempted leader or inverted intra‐cloud discharge) is a lightning phenomenon characterized by radiowave pulses similar to signatures of preliminary breakdown before negative cloud‐to‐ground flashes, but in this case no cloud‐to‐ground return strokes occur. We identified 128 isolated breakdown pulse trains in measurements collected in the Mediterranean by a broadband receiver (0.005‐7 MHz) in 2015 and 2018. By combining these records with concurrent Lightning Mapping Array measurements of very high frequency radiation (60‐66 MHz) emitted by in‐cloud discharges we investigate the development of each discharge. We identify two scenarios: either the discharges continue to propagate almost horizontally for more than 150 ms (73%), or they quickly fade out (27%). The geo‐localized sources of the observed isolated breakdown pulse trains, together with their waveform characteristics (duration, inter‐pulse intervals, regularity, bipolar shapes) show that both scenarios are similar to initiation processes preceding negative cloud‐to‐ground flashes.

Název v anglickém jazyce

Two propagation scenarios of isolated breakdown lightning processes in failed negative cloud‐to‐ground flashes

Popis výsledku anglicky

Isolated breakdown process (also known as attempted leader or inverted intra‐cloud discharge) is a lightning phenomenon characterized by radiowave pulses similar to signatures of preliminary breakdown before negative cloud‐to‐ground flashes, but in this case no cloud‐to‐ground return strokes occur. We identified 128 isolated breakdown pulse trains in measurements collected in the Mediterranean by a broadband receiver (0.005‐7 MHz) in 2015 and 2018. By combining these records with concurrent Lightning Mapping Array measurements of very high frequency radiation (60‐66 MHz) emitted by in‐cloud discharges we investigate the development of each discharge. We identify two scenarios: either the discharges continue to propagate almost horizontally for more than 150 ms (73%), or they quickly fade out (27%). The geo‐localized sources of the observed isolated breakdown pulse trains, together with their waveform characteristics (duration, inter‐pulse intervals, regularity, bipolar shapes) show that both scenarios are similar to initiation processes preceding negative cloud‐to‐ground flashes.

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

2020

Kód důvěrnosti údajů

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

Název periodika

Geophysical Research Letters

ISSN

0094-8276

e-ISSN

—

Svazek periodika

47

Číslo periodika v rámci svazku

23

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

e2020GL090593

Kód UT WoS článku

000598677000032

EID výsledku v databázi Scopus

2-s2.0-85097585950