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The effect of including field-aligned potentials in the coupling between Jupiter's thermosphere, ionosphere, and magnetosphere

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The effect of including field-aligned potentials in the coupling between Jupiter's thermosphere, ionosphere, and magnetosphere. / Ray, L. C.; Achilleos, N. A.; Yates, J. N.

In: Journal of Geophysical Research: Space Physics, Vol. 120, No. 8, 08.2015, p. 6987-7005.

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Harvard

Ray, LC, Achilleos, NA & Yates, JN 2015, 'The effect of including field-aligned potentials in the coupling between Jupiter's thermosphere, ionosphere, and magnetosphere', Journal of Geophysical Research: Space Physics, vol. 120, no. 8, pp. 6987-7005. https://doi.org/10.1002/2015JA021319

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Author

Ray, L. C. ; Achilleos, N. A. ; Yates, J. N. / The effect of including field-aligned potentials in the coupling between Jupiter's thermosphere, ionosphere, and magnetosphere. In: Journal of Geophysical Research: Space Physics. 2015 ; Vol. 120, No. 8. pp. 6987-7005.

Bibtex

@article{76e1da5bf590484980d676ef1a436c5e,
title = "The effect of including field-aligned potentials in the coupling between Jupiter's thermosphere, ionosphere, and magnetosphere",
abstract = "Jupiter's magnetosphere-ionosphere-thermosphere system drives the brightest, steadiest aurora in our solar system. This emission is the result of an electrical current system, which couples the magnetosphere to the planetary atmosphere in an attempt to enforce the corotation of the middle magnetospheric plasma. Field-aligned currents transfer angular momentum from the atmosphere to the magnetosphere. In the equatorial plane, the field-aligned currents diverge into radially outward currents, which exert a torque on the plasma due to the J × B forces. Equatorward ionospheric currents exert an opposite torque on the ionosphere, which interacts with the thermosphere via ion-neutral collisions. The upward field-aligned currents result in auroral electron precipitation, depositing energy into the high-latitude atmosphere. This energy input is a possible candidate for explaining the large thermospheric temperature measured by the Galileo probe at equatorial latitudes; however, previous atmospheric circulation models have shown that the bulk of the energy is transported poleward, rather than equatorward. We present numerical results of Jupiter's coupled magnetosphere-ionosphere-thermosphere system including, for the first time, field-aligned potentials. The model is compared with three previously published works. We find that the rotational decoupling of the magnetospheric and thermospheric angular velocities in the presence of field-aligned potentials tempers the thermospheric response to the outward transport of magnetospheric plasma, but this is a secondary effect to variations in the Pedersen conductance.",
keywords = "auroral currents, Jupiter, magnetosphere-ionosphere-thermosphere coupling",
author = "Ray, {L. C.} and Achilleos, {N. A.} and Yates, {J. N.}",
year = "2015",
month = aug,
doi = "10.1002/2015JA021319",
language = "English",
volume = "120",
pages = "6987--7005",
journal = "Journal of Geophysical Research: Space Physics",
issn = "2169-9402",
publisher = "Blackwell Publishing Ltd",
number = "8",

}

RIS

TY - JOUR

T1 - The effect of including field-aligned potentials in the coupling between Jupiter's thermosphere, ionosphere, and magnetosphere

AU - Ray, L. C.

AU - Achilleos, N. A.

AU - Yates, J. N.

PY - 2015/8

Y1 - 2015/8

N2 - Jupiter's magnetosphere-ionosphere-thermosphere system drives the brightest, steadiest aurora in our solar system. This emission is the result of an electrical current system, which couples the magnetosphere to the planetary atmosphere in an attempt to enforce the corotation of the middle magnetospheric plasma. Field-aligned currents transfer angular momentum from the atmosphere to the magnetosphere. In the equatorial plane, the field-aligned currents diverge into radially outward currents, which exert a torque on the plasma due to the J × B forces. Equatorward ionospheric currents exert an opposite torque on the ionosphere, which interacts with the thermosphere via ion-neutral collisions. The upward field-aligned currents result in auroral electron precipitation, depositing energy into the high-latitude atmosphere. This energy input is a possible candidate for explaining the large thermospheric temperature measured by the Galileo probe at equatorial latitudes; however, previous atmospheric circulation models have shown that the bulk of the energy is transported poleward, rather than equatorward. We present numerical results of Jupiter's coupled magnetosphere-ionosphere-thermosphere system including, for the first time, field-aligned potentials. The model is compared with three previously published works. We find that the rotational decoupling of the magnetospheric and thermospheric angular velocities in the presence of field-aligned potentials tempers the thermospheric response to the outward transport of magnetospheric plasma, but this is a secondary effect to variations in the Pedersen conductance.

AB - Jupiter's magnetosphere-ionosphere-thermosphere system drives the brightest, steadiest aurora in our solar system. This emission is the result of an electrical current system, which couples the magnetosphere to the planetary atmosphere in an attempt to enforce the corotation of the middle magnetospheric plasma. Field-aligned currents transfer angular momentum from the atmosphere to the magnetosphere. In the equatorial plane, the field-aligned currents diverge into radially outward currents, which exert a torque on the plasma due to the J × B forces. Equatorward ionospheric currents exert an opposite torque on the ionosphere, which interacts with the thermosphere via ion-neutral collisions. The upward field-aligned currents result in auroral electron precipitation, depositing energy into the high-latitude atmosphere. This energy input is a possible candidate for explaining the large thermospheric temperature measured by the Galileo probe at equatorial latitudes; however, previous atmospheric circulation models have shown that the bulk of the energy is transported poleward, rather than equatorward. We present numerical results of Jupiter's coupled magnetosphere-ionosphere-thermosphere system including, for the first time, field-aligned potentials. The model is compared with three previously published works. We find that the rotational decoupling of the magnetospheric and thermospheric angular velocities in the presence of field-aligned potentials tempers the thermospheric response to the outward transport of magnetospheric plasma, but this is a secondary effect to variations in the Pedersen conductance.

KW - auroral currents

KW - Jupiter

KW - magnetosphere-ionosphere-thermosphere coupling

U2 - 10.1002/2015JA021319

DO - 10.1002/2015JA021319

M3 - Journal article

AN - SCOPUS:84942821705

VL - 120

SP - 6987

EP - 7005

JO - Journal of Geophysical Research: Space Physics

JF - Journal of Geophysical Research: Space Physics

SN - 2169-9402

IS - 8

ER -