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| Titel |
Direct and inverse cascades in the geodynamo |
| VerfasserIn |
P. Hejda, M. Reshetnyak |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250029727
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| Zusammenfassung |
| The rapid rotation of planets causes cyclonic thermal turbulence in their cores which may generate the largescale magnetic fields observed outside the planets. We investigate numerically a model based on the geodynamo equations in simplified planar 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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