A preliminary study of Magnetosphere-Ionosphere-Thermosphere coupling key parameters at Jupiter Based on Juno multi-instrument data and modelling tools
- 1IRAP, PËPS, Toulouse Cedex 4, France (michel.blanc@irap.omp.eu)
- 2Laboratoire de Physique Atmosphérique et Planétaire, STAR Institute, Université de Liège, Liège, Belgium
- 3ISAC-CNR, Bologna, Italy
- 4INAF-Istituto di Astrofisica e Planetologia Spaziali, Rome, Italy
- 5The Johns Hopkins University Applied Physics Laboratory, Laurel, MD, USA
- 6Southwest Research Institute, San Antonio, Texas, USA
- 7NASA Goddard Space Flight Center, Greenbelt, MD, USA
- 8University of Maryland College Park, College Park, MD, 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. Juno observations have amply demonstrated that the Magnetosphere-Ionosphere-Thermosphere (MIT) coupling processes and regimes which control this interplay are significantly different from their Earth and Saturn counterparts. At the ionospheric level, these MIT coupling processes can be characterized by a set of key parameters which include ionospheric electrodynamic parameters (conductances, currents and electric fields), exchanges of particles along field lines and auroral emissions. Knowledge 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. We will present a method combining Juno multi-instrument data (MAG, JADE, JEDI, UVS, JIRAM and WAVES), adequate modelling tools (the TRANSPLANET ionospheric dynamics model and a simplified set of ionospheric current closure equations) and the AMDA data handling tools to provide preliminary estimates of these key parameters and their variation along the ionospheric footprint of Juno’s magnetic field line and across the auroral ovals for three of the first perijoves of the mission. We will discuss how this synergistic use of data and models can also contribute to provide a better determination of poorly known parameters such as the vertical structure of the auroral and polar Jovian neutral atmosphere.
How to cite: Blanc, M., Wang, Y., Andre, N., Blelly, P.-L., Louis, C., Marchaudon, A., Gerard, J.-C., Bonfond, B., Grodent, D., Dinelli, B. M., Adriani, A., Mura, A., Mauk, B., Clark, G., Allegrini, F., Bolton, S., Gladstone, R., Connerney, J., Kotsiaros, S., and Kurth, W.: A preliminary study of Magnetosphere-Ionosphere-Thermosphere coupling key parameters at Jupiter Based on Juno multi-instrument data and modelling tools, Europlanet Science Congress 2020, online, 21 September–9 Oct 2020, EPSC2020-979, https://doi.org/10.5194/epsc2020-979, 2020