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Axially Asymmetric Steady State Model of Jupiter's Magnetosphere-Ionosphere Coupling
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  • Ivan A. Pensionerov,
  • Stanley W. H. Cowley,
  • Elena S. Belenkaya,
  • Igor I. Alexeev
Ivan A. Pensionerov
Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics

Corresponding Author:pensionerov@gmail.com

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Stanley W. H. Cowley
University of Leicester, University of Leicester
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Elena S. Belenkaya
Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics
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Igor I. Alexeev
Lomonosov Moscow State University, Lomonosov Moscow State University
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Abstract

We present an axially asymmetric steady state model of Jupiter’s magnetosphere-ionosphere coupling, including precipitation-induced enhancement of the ionospheric Pedersen conductivity. We compare the magnetodisc current intensities calculated using this model with those determined directly from magnetic field measurements in various local time sectors, and find that the observed radial current intensities require an average radial mass transport rate of magnetospheric plasma of 2000 kg s-1. Models with a traditional mass transport value of 1000 kg s-1 produce significantly weaker radial currents than observed. We also study the effect of additional field-aligned currents associated with Jupiter’s nightside partial ring current and find that their inclusion leads to much better agreement between the model and observed magnetodisc radial currents in the region beyond ~40 Jupiter radii.
Nov 2021Published in Journal of Geophysical Research: Space Physics volume 126 issue 11. 10.1029/2021JA029608