Full-scale simulation study of the initial stage of ionospheric turbulence

Bengt Eliasson, Lennart Stenflo

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We present a full-scale simulation of the nonlinear interaction between an intense electromagnetic wave and the Earth's ionosphere, by means of a generalized Zakharov model. The radio wave propagates from the neutral atmosphere into the ionospheric plasma layer and reaches the turning points of the ordinary and extraordinary wave modes. At the turning point of the ordinary mode, a parametric instability takes place in which the electromagnetic wave decays into an electron plasma wave and an ion acoustic wave with a typical wavelength of one meter. This is followed by collapse and caviton formation and trapping of the intense electron plasma wave. The cavitons lead to an efficient excitation of slow X (or Z) waves that propagate further into the denser ionospheric layer at higher altitudes. We use a realistic ion (oxygen) mass, length scales, and other plasma parameters. This numerical study should be useful for understanding the nonlinear interaction between intense radio waves and the ionosphere.
LanguageEnglish
Article numberA02305
Number of pages9
JournalJournal of Geophysical Research: Space Physics
Volume113
Issue numberA2
DOIs
Publication statusPublished - 14 Feb 2008

Fingerprint

cavitons
radio waves
plasma waves
electron plasma
ionospherics
electromagnetic radiation
turbulence
Earth ionosphere
neutral atmospheres
plasma layers
ion acoustic waves
high altitude
oxygen ions
ionospheres
simulation
trapping
interactions
decay
wavelengths
excitation

Keywords

  • ionospheric turbulence
  • full-scale simulation

Cite this

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Full-scale simulation study of the initial stage of ionospheric turbulence. / Eliasson, Bengt; Stenflo, Lennart.

In: Journal of Geophysical Research: Space Physics, Vol. 113, No. A2, A02305, 14.02.2008.

Research output: Contribution to journalArticle

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