A frontal thunderstorm with several multi-cell lines found to produce energetic preliminary breakdown

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F22%3A00553343" target="_blank" >RIV/68378289:_____/22:00553343 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/22:10456488

Výsledek na webu

<a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021JD035780" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021JD035780</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1029/2021JD035780" target="_blank" >10.1029/2021JD035780</a>

Jazyk výsledku

angličtina

Název v původním jazyce

A frontal thunderstorm with several multi-cell lines found to produce energetic preliminary breakdown

Popis výsledku v původním jazyce

We combine electromagnetic measurements with meteorological and lightning detection data to explain an observation of unusually strong preliminary breakdown (PB) produced by a thunderstorm system that developed along the Mediterranean Coast of Southern France in the early hours of 19 June 2013. This multi-cellular storm was composed of several parallel convective lines in the NW-SE direction. Our analysis focuses on ten sequences of energetic electromagnetic PB pulses recorded by two receivers located at different distances from this thunderstorm. The peak currents, which generated these strong PB pulses, reached -36 kA. The initial polarity of all observed energetic PB pulses confirmed the movement of the negative charge downward, as in case of PB pulses preceding negative cloud-to-ground discharges. The locations of PB pulses appeared in areas with none or very weak lightning activity. Most PB pulses were initiated in small, short-living, rapidly moving convective storm cells characterized by low reflectivity values (generally < 40 dBZ), weak vertical development, and low flash density. Our findings indicate that the observed thunderstorm might posses temporary strong negatively charged pockets located above a strong positive charge region at low-level. Such charge arrangement, likely explains our observation of unusually strong PB pulses and the absence of RS pulses in electromagnetic recordings.

Název v anglickém jazyce

A frontal thunderstorm with several multi-cell lines found to produce energetic preliminary breakdown

Popis výsledku anglicky

We combine electromagnetic measurements with meteorological and lightning detection data to explain an observation of unusually strong preliminary breakdown (PB) produced by a thunderstorm system that developed along the Mediterranean Coast of Southern France in the early hours of 19 June 2013. This multi-cellular storm was composed of several parallel convective lines in the NW-SE direction. Our analysis focuses on ten sequences of energetic electromagnetic PB pulses recorded by two receivers located at different distances from this thunderstorm. The peak currents, which generated these strong PB pulses, reached -36 kA. The initial polarity of all observed energetic PB pulses confirmed the movement of the negative charge downward, as in case of PB pulses preceding negative cloud-to-ground discharges. The locations of PB pulses appeared in areas with none or very weak lightning activity. Most PB pulses were initiated in small, short-living, rapidly moving convective storm cells characterized by low reflectivity values (generally < 40 dBZ), weak vertical development, and low flash density. Our findings indicate that the observed thunderstorm might posses temporary strong negatively charged pockets located above a strong positive charge region at low-level. Such charge arrangement, likely explains our observation of unusually strong PB pulses and the absence of RS pulses in electromagnetic recordings.

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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

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

127

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

18

Strana od-do

e2021JD035780

Kód UT WoS článku

000765621000003

EID výsledku v databázi Scopus

2-s2.0-85125151250