Properties of unipolar magnetic field pulse trains generated by lightning discharges

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F13%3A10191472" target="_blank" >RIV/00216208:11320/13:10191472 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1002/grl.50366" target="_blank" >http://dx.doi.org/10.1002/grl.50366</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/grl.50366" target="_blank" >10.1002/grl.50366</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Properties of unipolar magnetic field pulse trains generated by lightning discharges

Popis výsledku v původním jazyce

We analyze and describe trains of regular unipolar microsecond-scale magnetic field pulses produced by intracloud lightning discharges. Waveforms of the magnetic field are measured using a newly developed broadband analyzer with a sampling interval of 12.5ns. The observed trains contained several tens of pulses, and the time interval between neighboring pulses typically varied between 1 and 10 mu s. The amplitude of the pulses also varied by 1 order of magnitude. A systematic analysis of these variations is done for the first time. The interpulse interval is usually increasing (on average by 4.1 mu s during a train), and the pulse amplitude is decreasing (on average by 15% of the maximum value within a given train). We propose a possible generation mechanism based on a hypothesis that periodical charge structures are present in the thundercloud. This mechanism can explain the observed evolution of peak amplitudes and interpulse intervals.

Název v anglickém jazyce

Properties of unipolar magnetic field pulse trains generated by lightning discharges

Popis výsledku anglicky

We analyze and describe trains of regular unipolar microsecond-scale magnetic field pulses produced by intracloud lightning discharges. Waveforms of the magnetic field are measured using a newly developed broadband analyzer with a sampling interval of 12.5ns. The observed trains contained several tens of pulses, and the time interval between neighboring pulses typically varied between 1 and 10 mu s. The amplitude of the pulses also varied by 1 order of magnitude. A systematic analysis of these variations is done for the first time. The interpulse interval is usually increasing (on average by 4.1 mu s during a train), and the pulse amplitude is decreasing (on average by 15% of the maximum value within a given train). We propose a possible generation mechanism based on a hypothesis that periodical charge structures are present in the thundercloud. This mechanism can explain the observed evolution of peak amplitudes and interpulse intervals.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BL - Fyzika plasmatu a výboje v plynech

OECD FORD obor

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Projekt

<a href="/cs/project/GA205%2F09%2F1253" target="_blank" >GA205/09/1253: Elektromagnetické jevy spojující troposféru, mezosféru, ionosféru a magnetosféru</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

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

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Svazek periodika

40

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

5

Strana od-do

1637-1641

Kód UT WoS článku

000319217800032

EID výsledku v databázi Scopus

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