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| Titel |
Solar wind vs magnetosheath turbulence and Alfvén vortices |
| VerfasserIn |
O. Alexandrova |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 15, no. 1 ; Nr. 15, no. 1 (2008-02-11), S.95-108 |
| Datensatznummer |
250012557
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| Publikation (Nr.) |
 copernicus.org/npg-15-95-2008.pdf |
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| Zusammenfassung |
| In this paper we give firstly a broad review of the space plasma turbulence
around the ion characteristic space and temporal scales within two natural
laboratories, the solar wind and the Earth magnetosheath. In both regions
power law spectra of magnetic fluctuations are observed. In both regions
these spectra have a break in the vicinity of the ion cyclotron frequency. A
distinctive feature of the magnetosheath turbulence is the presence of
Alfvén vortices at scales of the spectral break. The Alfvén vortices are
multi-scale nonlinear structures. We give a review of the main theoretical
features of incompressible Alfvén vortsices in the second part of the
paper. Finally, we analyze the spectral properties of the Alfvén vortex
solution and of the network of such vortices. We show that the observed
magnetosheath spectrum in presence of the Alfvén vortices can be described,
at least partially, by the vortex network model. |
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