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A study of lightning flash initiation prior to the first initial breakdown pulse

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10407437" target="_blank" >RIV/00216208:11320/19:10407437 - isvavai.cz</a>

  • Alternative codes found

    RIV/68378289:_____/19:00495325

  • Result on the web

    <a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=8nkkac3F_k" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=8nkkac3F_k</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1016/j.atmosres.2018.10.013" target="_blank" >10.1016/j.atmosres.2018.10.013</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    A study of lightning flash initiation prior to the first initial breakdown pulse

  • Original language description

    This study examines the initiation of two intracloud (IC) and two cloud-to-ground (CG) lightning flashes using electric field change (FA) sensors and VHF (LogRF) sensors located at seven sites near Oxford, Mississippi, USA. For each flash the initiating event caused a pulse in the LogRF data and started an Initial E-Change (IEC) in the FA data. The initiating LogRF pulses had powers &lt; 1 W and durations of similar to 1 mu s. Numerous LogRF pulses occurred during each IEC; these pulses had durations &lt;= 3 mu s. Fewer FA pulses occurred during each IEC; these pulses had durations of &lt;= 7 mu s. During each IEC, a few of the LogRF pulses were coincident with a FA pulse, and most such pairs of pulses enhanced the IEC; no IEC enhancing events occurred without such a coincident pair. Each flash had 1 or 2 IEC enhancing events soon after the initiating event and 1 or 2 enhancing events shortly before the first classic initial breakdown (IB) pulse occurred. The point dipole moments and durations of IECs of the two IC flashes were (-520C m, 620 mu s) and (-770C m, 1790 mu s) and for the two CG flashes were (9C m, 124 mu s) and (36C m, 130 mu s). We speculate that the LogRF events were positive corona streamers, that enhancing events occurred when a new streamer extended a previous streamer path, and that this process during the flash initiation developed a nascent channel needed for the negative breakdown of the IB pulses.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10305 - Fluids and plasma physics (including surface physics)

Result continuities

  • Project

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2019

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    Atmospheric Research

  • ISSN

    0169-8095

  • e-ISSN

  • Volume of the periodical

    217

  • Issue of the periodical within the volume

    Mar

  • Country of publishing house

    NL - THE KINGDOM OF THE NETHERLANDS

  • Number of pages

    14

  • Pages from-to

    10-23

  • UT code for WoS article

    000452931100002

  • EID of the result in the Scopus database

    2-s2.0-85055630098