A preliminary study of Magnetosphere‐Ionosphere‐Thermosphere coupling at Jupiter: Juno multi‐instrument measurements and modelling tools

Yuxian Wang, Michel Blanc*, Corentin Louis, Chi Wang, Nicolas André, Alberto Adriani, Frederic Allegrini, Pierre‐Louis Blelly, Scott Bolton, Bertrand Bonfond, George Clark, Bianca Maria Dinelli, Jean‐Claude Gérard, Randy Gladstone, Denis Grodent, Stavros Kotsiaros, William Kurth, Laurent Lamy, Philippe Louarn, Aurélie MarchaudonBarry Mauk, Alessandro Mura, Chihiro Tao

*Corresponding author for this work

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    Abstract

    The dynamics of the Jovian magnetosphere are controlled by the interplay of the planet’s fast rotation, its main iogenic plasma source and its interaction with the solar wind. Magnetosphere-Ionosphere-Thermosphere (MIT) coupling processes controlling this interplay are significantly different from their Earth and Saturn counterparts. At the ionospheric level, they can be characterized by a set of key parameters: ionospheric conductances, electric currents and fields, exchanges of particles along field lines, Joule heating and particle energy deposition. From these parameters, one can determine (1) how magnetospheric currents close into the ionosphere, and (2) the net deposition/extraction of energy into/out of the upper atmosphere associated to MIT coupling. We present a new method combining Juno multi-instrument data (MAG, JADE, JEDI, UVS, JIRAM and Waves) and modelling tools to estimate these key parameters along Juno’s trajectories. We first apply this method to two southern hemisphere main auroral oval crossings to illustrate how the coupling parameters are derived. We then present a preliminary statistical analysis of the morphology and amplitudes of these key parameters for eight among the first nine southern perijoves. We aim to extend our method to more Juno orbits to progressively build a comprehensive view of Jovian MIT coupling at the level of the main auroral oval.
    Original languageEnglish
    Article numbere2021JA029469
    JournalJournal of Geophysical Research: Space Physics
    Volume126
    Issue number9
    Number of pages25
    ISSN0148-0227
    DOIs
    Publication statusPublished - 2021

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