Ion energization by ELF wave packets formed of lightning-induced emission in the low-altitude magnetosphere

D. R. Shklyar, I. V. Kuzichev

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

We investigate a new type of resonant interaction between suprathermal ions and specific wave packets of ion cyclotron waves in which a spatially dependent wave frequency is close to the local ion cyclotron frequency, while the magnitude of the wave vector at a local point increases linearly with time. We argue that such wave packets are naturally formed of lightning-induced emission. This type of resonant wave-particle interaction, which has not been considered so far, appears to be very efficient and to result in essential consequences for both particles and waves, namely, a strong nondiffusive particle energization and simultaneous wave absorption. Since lightning strokes happen persistently over the terrestrial globe, the mechanism suggested in this paper constitutes a continual means of ion energization in the near-Earth space.

Original languageEnglish (US)
Pages (from-to)201-208
Number of pages8
JournalGeophysical Research Letters
Volume41
Issue number2
DOIs
StatePublished - Jan 28 2014
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Keywords

  • ion cyclotron waves
  • ion energization
  • resonant interaction
  • suprathermal ions
  • wave absorption

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