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Solar cycle effects on the dynamics of Jupiter's and Saturn's magnetospheres

Solar cycle effects on the dynamics of Jupiter's and Saturn's magnetospheres
Solar cycle effects on the dynamics of Jupiter's and Saturn's magnetospheres

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.

0038-0938
481-502
Jackman, C.M.
9bc3456c-b254-48f1-ade0-912c5b8b4529
Arridge, C.S.
2efb7acf-be5b-41b4-bade-8b4ff0d78236
Jackman, C.M.
9bc3456c-b254-48f1-ade0-912c5b8b4529
Arridge, C.S.
2efb7acf-be5b-41b4-bade-8b4ff0d78236

Jackman, C.M. and Arridge, C.S. (2011) Solar cycle effects on the dynamics of Jupiter's and Saturn's magnetospheres. Solar Physics, 274 (1-2), 481-502. (doi:10.1007/s11207-011-9748-z).

Record type: Article

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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Published date: 14 April 2011

Identifiers

Local EPrints ID: 437330
URI: http://eprints.soton.ac.uk/id/eprint/437330
ISSN: 0038-0938
PURE UUID: b9a06349-51ee-44a4-ade6-45fbe863adce
ORCID for C.M. Jackman: ORCID iD orcid.org/0000-0003-0635-7361

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Date deposited: 24 Jan 2020 17:31
Last modified: 10 Nov 2021 03:35

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Contributors

Author: C.M. Jackman ORCID iD
Author: C.S. Arridge

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