Lightning initiation: Strong pulses of VHF radiation accompany preliminary breakdown
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10389400" target="_blank" >RIV/00216208:11320/18:10389400 - isvavai.cz</a>
Alternative codes found
RIV/68378289:_____/18:00487518
Result on the web
<a href="https://doi.org/10.1038/s41598-018-21972-z" target="_blank" >https://doi.org/10.1038/s41598-018-21972-z</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s41598-018-21972-z" target="_blank" >10.1038/s41598-018-21972-z</a>
Alternative languages
Result language
angličtina
Original language name
Lightning initiation: Strong pulses of VHF radiation accompany preliminary breakdown
Original language description
We analyze lightning initiation process using magnetic field waveforms of preliminary breakdown (PB) pulses observed at time scales of a few tens of microseconds by a broad-band receiver. We compare these pulses with sources of narrow-band very high frequency (VHF) radiation at 60-66 MHz recorded by two separate Lightning Mapping Arrays (LMAs). We find that almost none of the observed PB pulses correspond to geo-located VHF radiation sources, in agreement with previous results and with the hypothesis that processes generating VHF radiation and PB pulses are only weakly related. However, our detailed analysis discovers that individual peaks of strong VHF radiation seen by separate LMA stations correspond surprisingly well to the PB pulses. This result shows that electromagnetic radiation generated during fast stepwise extension of developing lightning channels is spread over a large interval of frequencies. We also show that intense VHF radiation abruptly starts with the first PB pulse and that it is then continuously present during the entire PB phase of developing discharges.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Scientific Reports
ISSN
2045-2322
e-ISSN
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Volume of the periodical
8
Issue of the periodical within the volume
Feb
Country of publishing house
GB - UNITED KINGDOM
Number of pages
10
Pages from-to
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UT code for WoS article
000426045700071
EID of the result in the Scopus database
2-s2.0-85042728315