Journal article
Magnetosphere-Ionosphere-Thermosphere Coupling Study at Jupiter Based on Juno's First 30 Orbits and Modeling Tools
Journal of geophysical research. Space physics, Vol.127(10), pp.e2022JA030586-n/a
10/2022
DOI: 10.1029/2022JA030586
PMCID: PMC9787687
PMID: 36591321
Abstract
The dynamics of the Jovian magnetosphere is controlled by the 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 magnetosphere, ionosphere, and thermosphere. At the ionospheric level, these processes can be characterized by a set of parameters including conductances, field-aligned currents, horizontal currents, electric fields, transport of charged particles along field lines including the fluxes of electrons precipitating into the upper atmosphere which trigger auroral emissions, and the particle and Joule heating power dissipation rates into the upper atmosphere. Determination of these key parameters makes it possible to estimate the net transfer of momentum and energy between Jovian upper atmosphere and equatorial magnetosphere. A method based on a combined use of Juno multi-instrument data and three modeling tools was developed by Wang et al. (2021, ) and applied to an analysis of the first nine orbits to retrieve these parameters along Juno's magnetic footprint. We extend this method to the first 30 Juno science orbits and to both hemispheres. Our results reveal a large variability of these parameters from orbit to orbit and between the two hemispheres. They also show dominant trends. Southern current systems are consistent with the generation of a region of sub-corotating ionospheric plasma flows, while both super-corotating and sub-corotating plasma flows are found in the north. These results are discussed in light of the previous space and ground-based observations and currently available models of plasma convection and current systems, and their implications are assessed.
Details
- Title: Subtitle
- Magnetosphere-Ionosphere-Thermosphere Coupling Study at Jupiter Based on Juno's First 30 Orbits and Modeling Tools
- Creators
- S. Al Saati - Université Toulouse III - Paul SabatierN. Clement - Université Toulouse III - Paul SabatierC. Louis - Université Toulouse III - Paul SabatierM. Blanc - Université Toulouse III - Paul SabatierY. Wang - National Space Science CenterN. Andre - Université Toulouse III - Paul SabatierL. Lamy - Laboratoire d’études spatiales et d’instrumentation en astrophysiqueB. Bonfond - University of LiègeB. Collet - Aix-Marseille UniversitéF. Allegrini - Southwest Research InstituteS. Bolton - Southwest Research InstituteG. Clark - Johns Hopkins University Applied Physics LaboratoryJ. E. P. Connerney - Goddard Space Flight CenterJ-C Gerard - University of LiègeG. R. Gladstone - Southwest Research InstituteS. Kotsiaros - Technical University of DenmarkW. S. Kurth - University of IowaB. Mauk - Johns Hopkins University Applied Physics Laboratory
- Resource Type
- Journal article
- Publication Details
- Journal of geophysical research. Space physics, Vol.127(10), pp.e2022JA030586-n/a
- DOI
- 10.1029/2022JA030586
- PMID
- 36591321
- PMCID
- PMC9787687
- NLM abbreviation
- J Geophys Res Space Phys
- ISSN
- 2169-9380
- eISSN
- 2169-9402
- Publisher
- Amer Geophysical Union
- Number of pages
- 27
- Grant note
- Specialized Research Fund for State Key Laboratories of China Belgian Federal Science Policy Office (BELSPO) via the PRODEX Program of ESA CNES; Centre National D'etudes Spatiales Youth Science and Technology Innovation Foundation of NSSC, Pandeng Program of National Space Science Center, Chinese Academy of Sciences 18/FRL/6199 / Science Foundation Ireland
- Language
- English
- Date published
- 10/2022
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984455541102771
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