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| Titel |
Direct and inverse cascades in the geodynamo |
| VerfasserIn |
M. Reshetnyak, P. Hejda |
| 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. 6 ; Nr. 15, no. 6 (2008-11-24), S.873-880 |
| Datensatznummer |
250012804
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| Publikation (Nr.) |
 copernicus.org/npg-15-873-2008.pdf |
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| Zusammenfassung |
| The rapid rotation of planets causes cyclonic thermal
turbulence in their cores which may generate the large-scale
magnetic fields observed outside the planets.
We investigate numerically a model based on the geodynamo equations in simplified geometry,
which enables us to reproduce the main features of small-scale geostrophic flows in physical
and wave vector spaces.
We find fluxes of kinetic and magnetic energy
as a function of the wave number and demonstrate the
co-existence of forward and inverse cascades.
We also explain the mechanism of magnetic field saturation at the end of the kinematic dynamo regime. |
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