Post-Return Stroke VHF Electromagnetic Activity in North-Western Mediterranean CG Flashes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F24%3A00598998" target="_blank" >RIV/68378289:_____/24:00598998 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/24:10492264

Výsledek na webu

<a href="https://ieeexplore.ieee.org/abstract/document/10584766" target="_blank" >https://ieeexplore.ieee.org/abstract/document/10584766</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.46620/URSIATRASC24/PBGZ6353" target="_blank" >10.46620/URSIATRASC24/PBGZ6353</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Post-Return Stroke VHF Electromagnetic Activity in North-Western Mediterranean CG Flashes

Popis výsledku v původním jazyce

We investigate the electromagnetic activity following the first return stroke (RS), using data from the SLAVIA (Shielded Loop Antenna with a Versatile Integrated Amplifier) sensor and the lightning mapping array SAETTA (Suivi de l'Activite Electrique Tridimensionnelle Totale de l'Atmosphere). From data collected between September and December 2015 in the north-western Mediterranean region, we selected 69 negative cloud-to-ground (-CG) and 29 positive cloud-to-ground (+CG) flashes. Within SAETTA data, we observe a reduction in counts and power of VHF radiation sources immediately after the RS pulse in 62CG flashes. Contrastingly, all examined +CG flashes exhibit a rapid increase in the counts and power of VHF radiation sources immediately after the RS. We offer a hypothesis of a step-like propagation of a negative leader starting at the top end of the lightning channel inside the thundercloud, emitting electromagnetic radiation across a broad frequency spectrum.

Název v anglickém jazyce

Post-Return Stroke VHF Electromagnetic Activity in North-Western Mediterranean CG Flashes

Popis výsledku anglicky

We investigate the electromagnetic activity following the first return stroke (RS), using data from the SLAVIA (Shielded Loop Antenna with a Versatile Integrated Amplifier) sensor and the lightning mapping array SAETTA (Suivi de l'Activite Electrique Tridimensionnelle Totale de l'Atmosphere). From data collected between September and December 2015 in the north-western Mediterranean region, we selected 69 negative cloud-to-ground (-CG) and 29 positive cloud-to-ground (+CG) flashes. Within SAETTA data, we observe a reduction in counts and power of VHF radiation sources immediately after the RS pulse in 62CG flashes. Contrastingly, all examined +CG flashes exhibit a rapid increase in the counts and power of VHF radiation sources immediately after the RS. We offer a hypothesis of a step-like propagation of a negative leader starting at the top end of the lightning channel inside the thundercloud, emitting electromagnetic radiation across a broad frequency spectrum.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název statě ve sborníku

2024 4TH URSI ATLANTIC RADIO SCIENCE MEETING, AT-RASC 2024

ISBN

979-8-3503-6025-7

ISSN

—

e-ISSN

—

Počet stran výsledku

4

Strana od-do

200952

Název nakladatele

IEEE

Místo vydání

USA

Místo konání akce

Meloneras

Datum konání akce

19. 5. 2024

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

001269451500180