Field line resonances in discretized magnetospheric models: an artifact study
For more than two decades numerical models of the Earth's magnetosphere have been used successfully to study magnetospheric dynamic features such as the excitation of ULF pulsations and the mechanism of field line resonance. However, numerical formulations simplify important properties of t...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
1997-06-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/15/614/1997/angeo-15-614-1997.pdf |
| Summary: | For more than two decades numerical models of
the Earth's magnetosphere have been used successfully to study magnetospheric
dynamic features such as the excitation of ULF pulsations and the mechanism of
field line resonance. However, numerical formulations simplify important
properties of the real system. For instance the Alfvén continuum becomes
discrete because of a finite grid size. This discretization can be a possible
source of numerical artefacts. Therefore a careful interpretation of any
observed features is required. Examples of such artefacts are presented using
results from a three dimensional dipole model of the magnetosphere, including an
inhomogeneous distribution of the Alfvén velocity. |
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| ISSN: | 0992-7689 1432-0576 |