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86400 Solar Cycle Effects on the Dynamics of Jupiter’s and Saturn’s Magnetospheres | Solar Physics
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Solar Cycle Effects on the Dynamics of Jupiter’s and Saturn’s Magnetospheres

  • The Sun–Earth Connection near Solar Minimum
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Abstract

The giant planetary magnetospheres surrounding Jupiter and Saturn respond in quite different ways, compared to Earth, to changes in upstream solar wind conditions. Spacecraft have visited Jupiter and Saturn during both solar cycle minima and maxima. In this paper we explore the large-scale structure of the interplanetary magnetic field (IMF) upstream of Saturn and Jupiter as a function of solar cycle, deduced from solar wind observations by spacecraft and from models. We show the distributions of solar wind dynamic pressure and IMF azimuthal and meridional angles over the changing solar cycle conditions, detailing how they compare to Parker predictions and to our general understanding of expected heliospheric structure at 5 and 9 AU. We explore how Jupiter’s and Saturn’s magnetospheric dynamics respond to varying solar wind driving over a solar cycle under varying Mach number regimes, and consider how changing dayside coupling can have a direct effect on the nightside magnetospheric response. We also address how solar UV flux variability over a solar cycle influences the plasma and neutral tori in the inner magnetospheres of Jupiter and Saturn, and estimate the solar cycle effects on internally driven magnetospheric dynamics. We conclude by commenting on the effects of the solar cycle in the release of heavy ion plasma into the heliosphere, ultimately derived from the moons of Jupiter and Saturn.

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Author notes

  1. C. M. Jackman

    Present address: Department of Physics and Astronomy, University College London, Gower Place, WC1E 6BT, London, UK

Authors and Affiliations

  1. Blackett Laboratory, Imperial College London, Prince Consort Road, London, UK

    C. M. Jackman

  2. Mullard Space Science Laboratory, Department of Space and Climate Physics, University College London, Dorking, UK

    C. S. Arridge

  3. The Centre for Planetary Sciences at UCL/Birkbeck, London, UK

    C. S. Arridge

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  1. C. M. Jackman
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  2. C. S. Arridge
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Correspondence to C. M. Jackman.

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The Sun–Earth Connection near Solar Minimum

Guest Editors: M.M. Bisi, B.A. Emery, and B.J. Thompson.

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Jackman, C.M., Arridge, C.S. Solar Cycle Effects on the Dynamics of Jupiter’s and Saturn’s Magnetospheres. Sol Phys 274, 481–502 (2011). https://doi.org/10.1007/s11207-011-9748-z

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