EGU22-8268
https://doi.org/10.5194/egusphere-egu22-8268
EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Magnetosphere-Ionosphere-Thermosphere Coupling study at Jupiter Based on Juno First 30 Orbits and Modelling Tools

Michel Blanc1, Sariah Al Saati1, Noe Clement1, Yuxian Wang2, Corentin Louis3, Nicolas Andre1, Laurent Lamy4, Jean-Claude Gérard5, Bertrand Bonfond5, George Clark6, Barry Mauk6, Frederick Allegrini7, Randy Gladstone7, Scott Bolton7, Stavros Kotsiaros8, and William Kurth9
Michel Blanc et al.
  • 1IRAP, PËPS, Toulouse Cedex 4, France (michel.blanc@irap.omp.eu)
  • 2State Key Laboratory for Space Weather, NSSC, CAS, China
  • 3Dublin Institute for Advanced Studies, Dublin, Ireland
  • 4LAM, Marseille
  • 5University of Liège, Belgium
  • 6JHU-APL, Laurel, MD, USA
  • 7SwRI, San Antonio, TX, USA
  • 8Technical University of Denmark
  • 9University of Iowa, USA

The dynamics of the Jovian magnetosphere is controlled by the complex interplay of the planet’s fast rotation, its solar-wind interaction and its main plasma source at the Io torus, mediated by coupling processes involving its thermosphere, ionosphere and magnetosphere, referred to as “MIT coupling processes”. At the ionospheric level, these processes can be characterized by a set of key parameters which include ionospheric conductances, currents and electric fields, transport of charged particles along field lines which carry electric currents connecting the ionosphere and magnetosphere, and among them fluxes of electrons precipitating into the upper atmosphere which trigger auroral emissions. Determination of these key parameters in turn makes it possible to estimate the net deposition/extraction of momentum and energy into/out of the Jovian upper atmosphere. A method based on a combined use of Juno multi-instrument data (MAG, JADE, JEDI, UVS, JIRAM and WAVES) and three modelling tools was first developed by Wang et al. (2021) and applied to an analysis of the first nine Juno orbits to retrieve these key parameters along the Juno magnetic footprint. In this communication we will extend this method to the first thirty Juno science orbits and to both north and south main auroral ovals crossings. Our results make it possible to characterize how the local systems of field-aligned electric currents, height-integrated ionospheric conductances, electric currents and fields, and Joule and particle heating rates vary across the main ovals between their poleward and equatorward edges. They suggest that southern current systems display a trend consistent with the generation of a region of sub-corotating ionospheric plasma poleward of the main aurora, while this dominant trend is not found around the northern main auroral oval.

How to cite: Blanc, M., Al Saati, S., Clement, N., Wang, Y., Louis, C., Andre, N., Lamy, L., Gérard, J.-C., Bonfond, B., Clark, G., Mauk, B., Allegrini, F., Gladstone, R., Bolton, S., Kotsiaros, S., and Kurth, W.: Magnetosphere-Ionosphere-Thermosphere Coupling study at Jupiter Based on Juno First 30 Orbits and Modelling Tools, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-8268, https://doi.org/10.5194/egusphere-egu22-8268, 2022.

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