Modelling the radial penetration of Solar-Wind-driven convection electric field in the Jovian magnetosphere, in relation to observed local-time asymmetries

Modelling the radial penetration of Solar-Wind-driven convection electric field in the Jovian magnetosphere, in relation to observed local-time asymmetries | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL This is a preprint and has not been peer reviewed. Data may be preliminary. 9 January 2026 V1 Latest version Share on Modelling the radial penetration of Solar-Wind-driven convection electric field in the Jovian magnetosphere, in relation to observed local-time asymmetries Authors : Marie Devinat 0009-0003-3387-9998 [email protected] , Michel F. Blanc 0000-0002-1290-7350 , Zhi-Yang Liu 0000-0003-3800-1044 , Yuki Nakamura 0000-0003-1700-238X , Yuxian Wang 0000-0002-8736-5541 , Sariah Al Saati 0000-0002-9524-8687 , Noé Clément 0000-0001-9928-2981 , Chongjing Yuan 0000-0003-1434-5803 , Aneesah Kamran 0000-0003-3736-9680 , Nicolas André 0000-0001-8017-5676 , and Catherine Senior 0000-0002-4124-0612 Authors Info & Affiliations https://doi.org/10.22541/au.176800070.08893684/v1 78 views 74 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Many current models of plasma transport in the Jovian magnetodisk/plasmasheet consider it to be azimuthally symmetric over radial distances extending from the outer edge of the Io torus to about 50 Jovian radii. But there are also many pieces of evidence pointing to a local time asymmetry in this system at such radial distances, and in the upper atmosphere to which it is coupled. Many of these observed asymmetries have been interpreted as the result of a large-scale dawn-to-dusk electric field generated across the magnetospheric cavity by its interaction with the Solar Wind that would be superimposed to the dominant corotation electric field. But no consistent model of this electric field, of its generation and of its mapping to different magnetospheric radial distances and ionospheric altitudes exists yet. We attempt to fill this gap by developing a simple semi-analytical model of electric fields, plasma convection, and current flows in the Jovian ionosphere and magnetosphere derived from the Earth case, which describes their variations with ionospheric colatitude and magnetospheric radial distance. Comparison to existing estimates of asymmetries and currents support the idea that the dawn-dusk electrostatic potential existing across the polar cap inside the main auroral emissions does penetrate to lower latitudes and down to the Io torus location, and is only partly attenuated by the shielding effect of trapped particles in the magnetodisk. Supplementary Material File (1057370_0_merged_1764686290.pdf) Download 52.58 MB File (detailled_conductances_correction.pdf) Download 378.67 KB File (figure_inputconductances_ddefield_withj.pdf) Download 15.62 MB Information & Authors Information Version history V1 Version 1 09 January 2026 Copyright This work is licensed under a Creative Commons Attribution 4.0 International License Keywords asymmetry electric field juno magnetosphere-ionosphere-thermosphere modeling coupling Authors Affiliations Marie Devinat 0009-0003-3387-9998 [email protected] Institut de Recherche en Astrophysique et Planetologie View all articles by this author Michel F. Blanc 0000-0002-1290-7350 IRAP, CNRS-UPS-CNES View all articles by this author Zhi-Yang Liu 0000-0003-3800-1044 Institut de Recherche en Astrophysique et Planetologie View all articles by this author Yuki Nakamura 0000-0003-1700-238X Graduate School of Science, The University of Tokyo View all articles by this author Yuxian Wang 0000-0002-8736-5541 National Space Science Center, Chinese Academy of Sciences View all articles by this author Sariah Al Saati 0000-0002-9524-8687 Institut de Recherche en Astrophysique et Planétologie View all articles by this author Noé Clément 0000-0001-9928-2981 IPSL View all articles by this author Chongjing Yuan 0000-0003-1434-5803 Institute of Geology and Geophysics, Chinese Academy of Sciences View all articles by this author Aneesah Kamran 0000-0003-3736-9680 Institut de Recherche en Astrophysique et Planetologie View all articles by this author Nicolas André 0000-0001-8017-5676 Institut de Recherche en Astrophysique et Planétologie, CNRS-Université Toulouse III-CNES View all articles by this author Catherine Senior 0000-0002-4124-0612 Met Office View all articles by this author Funding Information Université de Toulouse Marie Devinat Metrics & Citations Metrics Article Usage 78 views 74 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Marie Devinat, Michel F. Blanc, Zhi-Yang Liu, et al. Modelling the radial penetration of Solar-Wind-driven convection electric field in the Jovian magnetosphere, in relation to observed local-time asymmetries. Authorea . 09 January 2026. DOI: https://doi.org/10.22541/au.176800070.08893684/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. For more information or tips please see 'Downloading to a citation manager' in the Help menu . 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