Unipolar and bipolar pulses emitted during the development of lightning flashes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10319623" target="_blank" >RIV/00216208:11320/15:10319623 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378289:_____/15:00445915

Výsledek na webu

<a href="http://dx.doi.org/10.1002/2015GL064777" target="_blank" >http://dx.doi.org/10.1002/2015GL064777</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/2015GL064777" target="_blank" >10.1002/2015GL064777</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Unipolar and bipolar pulses emitted during the development of lightning flashes

Popis výsledku v původním jazyce

Both unipolar and bipolar magnetic or electric field pulses have been observed during preparatory stages of a lightning flash. We introduce a new simple analytical model to describe both kinds of pulses. We show how the polarity overshoot depends on theparameters of the model, including the propagation velocity of the current pulse, the step length, and the injected current waveshape. We observe that the expression for the radiation part of the magnetic field can be decomposed into two time-shifted terms with opposite polarities. The time shift of the two terms is determined by the overall propagation time of the current pulse. The model well corresponds not only to observations of the bipolar preliminary breakdown pulses at time scales of tens of microseconds but also to both unipolar and bipolar dart-stepped leader pulses at submicrosecond time scales.

Název v anglickém jazyce

Unipolar and bipolar pulses emitted during the development of lightning flashes

Popis výsledku anglicky

Both unipolar and bipolar magnetic or electric field pulses have been observed during preparatory stages of a lightning flash. We introduce a new simple analytical model to describe both kinds of pulses. We show how the polarity overshoot depends on theparameters of the model, including the propagation velocity of the current pulse, the step length, and the injected current waveshape. We observe that the expression for the radiation part of the magnetic field can be decomposed into two time-shifted terms with opposite polarities. The time shift of the two terms is determined by the overall propagation time of the current pulse. The model well corresponds not only to observations of the bipolar preliminary breakdown pulses at time scales of tens of microseconds but also to both unipolar and bipolar dart-stepped leader pulses at submicrosecond time scales.

Druh

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

CEP obor

BL - Fyzika plasmatu a výboje v plynech

OECD FORD obor

—

Projekt

<a href="/cs/project/GA14-31899S" target="_blank" >GA14-31899S: Družicová, balonová a pozemní meření elektromagnetických projevů bouřkové aktivity</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

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

42

Číslo periodika v rámci svazku

17

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

7206-7213

Kód UT WoS článku

000363411200043

EID výsledku v databázi Scopus

2-s2.0-84943361810