Maximum sprite streamer luminosity near the stratopause

Martin Fullekrug, Stanislaus Nnadih, Serge Soula, Janusz Mlynarczyk, Michael Stock , Jeff Lapierre, Michael Kosch

Research output: Contribution to journalLetter

Abstract

Sprites are composed of numerous streamers which exhibit transient luminosities in the upper middle atmosphere above thunderclouds after initiation by an intense positive lightning discharge, often followed by lightning continuing current. Here we report the discovery of a sprite which exhibits its main luminosity near the stratopause. This novel phenomenon is attributed to a sudden surge of intracloud lightning leader activity, based on a rigorous analysis of our observed electromagnetic waveforms. Each lightning leader discharge causes an additional electric field that generates a small amount of electromagnetic energy near the stratopause and thereby contributes to the overall sprite luminosity morphology. The observation of sprite streamers near the stratopause is important because it is relevant for the ongoing assessment of the lightning impact on N2 and CO2 with emissions from the near to far infrared part of the spectrum.
Original languageEnglish
Pages (from-to)12572-12579
Number of pages8
JournalGeophysical Research Letters
Volume46
Issue number21
Early online date16 Oct 2019
DOIs
Publication statusPublished - 16 Nov 2019

Keywords

  • atmospheric and space electricity
  • lightning discharges
  • transient luminous events

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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