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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 18, issue 10
Ann. Geophys., 18, 1283–1292, 2000
https://doi.org/10.1007/s00585-000-1283-4
© European Geosciences Union 2000
Ann. Geophys., 18, 1283–1292, 2000
https://doi.org/10.1007/s00585-000-1283-4
© European Geosciences Union 2000

  31 Oct 2000

31 Oct 2000

On the spectrum of mid-latitude sporadic-E irregularities

Yu. V. Kyzyurov Yu. V. Kyzyurov
  • Main Astronomical Observatory NASU, Kiev-127, 03680, Ukraine

Abstract. We discuss the creation of mid-latitude sporadic-E plasma irregularities (with length-scales smaller than sporadic layer thickness) by the neutral atmosphere turbulence. Using fluid equations, the relation between plasma density fluctuations and the velocity field of neutrals is derived. After a brief discussion of the relevant neutral turbulence, the analytical expression for the power spectrum of plasma irregularities is obtained. This expression allows a power-law type of experimental irregularity spectra (the spectral index depends on sporadic-E characteristics) and possible departures in detail of the irregularity spectra from the power-law form to be explained. In addition, it allows us to make estimates of length-scales at which such departures must occur.

Key words: Ionosphere (ionospheric irregularities; mid-latitude ionosphere) – Space plasma physics (turbulence)

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