Low frequency electromagnetic radiation from sprite streamers

Jianqi Qin, Sebastien Celestin, Victor P. Pasko

    Research output: Contribution to journalArticle

    16 Citations (Scopus)

    Abstract

    Sprites are mesospheric discharges that carry significant electrical currents and produce electromagnetic radiation observed typically in the extremely low (ELF) to ultra low (ULF) frequency bands. In this letter, we present the first theoretical estimates of the electromagnetic radiation produced by individual sprite streamers using simulation results from a plasma fluid model. It is demonstrated that the spectral content of the radiation produced by sprite streamers is a function of the air density N and the lightning-induced quasi-static ambient electric field E in the regions of space where the sprite streamers are propagating. We demonstrate that the exponential growth of the current in sprite streamers at 75 km would be preferentially associated with electromagnetic radiation in the frequency range from 0 and up to ∼3 kHz, whereas the growth of the streamer current at 40 km could produce radiation with frequencies up to ∼300 kHz, consistently with the scaling of atmospheric air density. We further conjecture that the periodic branching of streamers may lead to a radiation spectrum enhancement in the very low (VLF) to low frequency (LF) range.

    Original languageEnglish (US)
    Article numberL22803
    JournalGeophysical Research Letters
    Volume39
    Issue number22
    DOIs
    StatePublished - Nov 28 2012

    Fingerprint

    sprite
    electromagnetic radiation
    low frequencies
    frequency ranges
    extremely low frequencies
    radiation spectra
    air
    lightning
    radiation
    electric field
    scaling
    plasma
    electric fields
    fluid
    augmentation
    fluids
    estimates
    simulation

    All Science Journal Classification (ASJC) codes

    • Geophysics
    • Earth and Planetary Sciences(all)

    Cite this

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    abstract = "Sprites are mesospheric discharges that carry significant electrical currents and produce electromagnetic radiation observed typically in the extremely low (ELF) to ultra low (ULF) frequency bands. In this letter, we present the first theoretical estimates of the electromagnetic radiation produced by individual sprite streamers using simulation results from a plasma fluid model. It is demonstrated that the spectral content of the radiation produced by sprite streamers is a function of the air density N and the lightning-induced quasi-static ambient electric field E in the regions of space where the sprite streamers are propagating. We demonstrate that the exponential growth of the current in sprite streamers at 75 km would be preferentially associated with electromagnetic radiation in the frequency range from 0 and up to ∼3 kHz, whereas the growth of the streamer current at 40 km could produce radiation with frequencies up to ∼300 kHz, consistently with the scaling of atmospheric air density. We further conjecture that the periodic branching of streamers may lead to a radiation spectrum enhancement in the very low (VLF) to low frequency (LF) range.",
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    Low frequency electromagnetic radiation from sprite streamers. / Qin, Jianqi; Celestin, Sebastien; Pasko, Victor P.

    In: Geophysical Research Letters, Vol. 39, No. 22, L22803, 28.11.2012.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Low frequency electromagnetic radiation from sprite streamers

    AU - Qin, Jianqi

    AU - Celestin, Sebastien

    AU - Pasko, Victor P.

    PY - 2012/11/28

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    AB - Sprites are mesospheric discharges that carry significant electrical currents and produce electromagnetic radiation observed typically in the extremely low (ELF) to ultra low (ULF) frequency bands. In this letter, we present the first theoretical estimates of the electromagnetic radiation produced by individual sprite streamers using simulation results from a plasma fluid model. It is demonstrated that the spectral content of the radiation produced by sprite streamers is a function of the air density N and the lightning-induced quasi-static ambient electric field E in the regions of space where the sprite streamers are propagating. We demonstrate that the exponential growth of the current in sprite streamers at 75 km would be preferentially associated with electromagnetic radiation in the frequency range from 0 and up to ∼3 kHz, whereas the growth of the streamer current at 40 km could produce radiation with frequencies up to ∼300 kHz, consistently with the scaling of atmospheric air density. We further conjecture that the periodic branching of streamers may lead to a radiation spectrum enhancement in the very low (VLF) to low frequency (LF) range.

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