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| Titel |
Response of Jupiter's thermospheric flows to different magnetospheric conditions |
| VerfasserIn |
Japheth Yates, Nicholas Achilleos, Patrick Guio |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250041310
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| Zusammenfassung |
| The magnetosphere-ionosphere coupling at Jupiter is known to play a central role in
generating auroral emissions at this planet. The strength of these emissions is partly
determined by the relative rotational flows in the upper atmosphere (thermosphere) and in the
magnetodisc. We present simulations of the atmospheric flow which employ an azimuthally
symmetric global circulation model. In order to make preliminary estimates of
the effects of upstream solar wind conditions on these flows, we calculate models
which assume different profiles of magnetic field and plasma angular velocity in the
magnetodisc, corresponding to compressed and expanded states of the planet’s
magnetosphere. We use these simulations to comment on the relationship between global
magnetospheric configuration and the global pattern of winds and energy inputs into
the thermosphere. We comment on the procedure for obtaining solutions for the
plasma angular velocity in the presence of an ionospheric conductance which is itself
dependent on the field-aligned currents which flow between the ionosphere and the
disc. |
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