Properties of unipolar magnetic ?eld pulse trains generated by lightning discharges

Kód výsledku v IS VaVaI

RIV/68378289:_____/13:00398274 - isvavai.cz

Výsledek na webu

http://dx.doi.org/10.1002/grl.50366

DOI - Digital Object Identifier

10.1002/grl.50366

Jazyk výsledku

angličtina

Název v původním jazyce

Properties of unipolar magnetic ?eld 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 12.5?ns. The observed trains contained several tens of pulses, and the time interval between neighboring pulses typically varied between 1 and 10 ?s. The amplitude of the pulses also varied by 1 order of magnitude. A systematic analysis of these variationsis done for the first time. The interpulse interval is usually increasing (on average by 4.1??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 ?eld 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 12.5?ns. The observed trains contained several tens of pulses, and the time interval between neighboring pulses typically varied between 1 and 10 ?s. The amplitude of the pulses also varied by 1 order of magnitude. A systematic analysis of these variationsis done for the first time. The interpulse interval is usually increasing (on average by 4.1??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

GA205/09/1253: Elektromagnetické jevy spojující troposféru, mezosféru, ionosféru a magnetosféru

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

—

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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