Conference proceeding
Magnetosphere-Ionosphere-Thermosphere Coupling study at Jupiter Based on Juno First 30 Orbits and Modeling Tools
EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-8268
01/20/2023
DOI: 10.5194/egusphere-egu22-8268
Abstract
<p>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.</p>
Details
- Title: Subtitle
- Magnetosphere-Ionosphere-Thermosphere Coupling study at Jupiter Based on Juno First 30 Orbits and Modeling Tools
- Creators
- Sariah Al SaatiNoé ClémentCorentin LouisMichel BlancYuxian WangNicolas AndréLaurent LamyJean-Claude GérardBertrand BonfondBarry MaukGeorge ClarkFrédéric AllegriniScott BoltonRandy GladstoneJohn ConnerneyStavros KotsiarosWilliam Kurth
- Resource Type
- Conference proceeding
- Publication Details
- EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-8268
- DOI
- 10.5194/egusphere-egu22-8268
- Publisher
- Copernicus GmbH
- Language
- English
- Date published
- 01/20/2023
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984531658302771
Metrics
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