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European Geosciences Union, Annales Geophysicae, 10(18), p. 1283-1292, 2000

DOI: 10.1007/s00585-000-1283-4

European Geosciences Union, Annales Geophysicae, 10(18), p. 1283-1292

DOI: 10.1007/s005850000259

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On the spectrum of mid-latitude sporadic- E irregularities

Journal article published in 1 by Y.-U. V. Kyzyurov
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

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)