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| Titel |
Diffusion spreading of middle-latitude ionospheric plasma irregularities |
| VerfasserIn |
N. Blaunstein |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 13, no. 6 ; Nr. 13, no. 6, S.617-626 |
| Datensatznummer |
250011882
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| Publikation (Nr.) |
 copernicus.org/angeo-13-617-1995.pdf |
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| Zusammenfassung |
| In contrast to the way that the spreading of
irregularities in a plasma is usually considered, the diffusion spreading of
irregularities stretched along the geomagnetic field B is
examined using a three-dimensional rigorous numerical model of quasi-neutral
diffusion in the presence of a magnetic field, in conjunction with the actual
height variations of the diffusion and conductivity tensors in the ionosphere. A
comparison with the earlier constructed approximate model of unipolar diffusion
was made. As in the previous case, the same peculiarities of irregularity
spreading in the inhomogeneous background ionospheric plasma were observed. The
accuracy of the approximate model for describing the process of spreading of
anisotropic ionospheric irregularities is established. Time relaxation effects
of real heating-induced ionospheric irregularities on their scale transverse to B
are presented using the approximate analytical model for the case of a
quasi-homogeneous ionospheric plasma. The calculated results have a vivid
physical meaning and can be directly compared with experimental data on the
radiophysical observations of artificial heating-induced irregularities created
by powerful radio waves in the ionosphere. |
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