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Average field-aligned current configuration parameterized by solar wind conditions

Average field-aligned current configuration parameterized by solar wind conditions
Average field-aligned current configuration parameterized by solar wind conditions
We present the first large-scale comparison of the spatial distribution of field-aligned currents as measured by the Active Magnetosphere and Planetary Electrodynamics Response Experiment, with the location and brightness of the average auroral oval, determined from the Imager for Magnetopause-to-Aurora Global Exploration far ultraviolet instrument. These distributions are compared under the same interplanetary magnetic field magnitude and clock angle conditions. The field-aligned currents and auroral oval drop to lower latitudes, as the interplanetary magnetic field becomes both increasingly stronger in magnitude and increasingly southward. We find that the region 2 currents are more closely aligned with the distribution of auroral UV emission, whether that be in the discrete auroral zone about dusk or in the postmidnight diffuse aurora sector. The lack of coincidence between the region 1 field-aligned currents with the auroral oval in the dusk sector is contrary to expectation.
field-aligned currents, auroral oval
2169-9402
1294-1307
Carter, J.A.
750f3f36-98fc-4729-acfe-60ded2bd23c1
Milan, S.E.
4495fdee-b600-43e5-99f7-6193a849b7f5
Coxon, John
566baea5-6a30-4855-bde3-a09c115efde4
Walach, M.-T.
fa30182c-4902-4562-8a9f-8e38f41fcf85
Anderson, B.J.
51b61cf6-5745-467f-9efa-5e4bef5f88c7
Carter, J.A.
750f3f36-98fc-4729-acfe-60ded2bd23c1
Milan, S.E.
4495fdee-b600-43e5-99f7-6193a849b7f5
Coxon, John
566baea5-6a30-4855-bde3-a09c115efde4
Walach, M.-T.
fa30182c-4902-4562-8a9f-8e38f41fcf85
Anderson, B.J.
51b61cf6-5745-467f-9efa-5e4bef5f88c7

Carter, J.A., Milan, S.E., Coxon, John, Walach, M.-T. and Anderson, B.J. (2016) Average field-aligned current configuration parameterized by solar wind conditions. Journal of Geophysical Research: Space Physics, 121 (2), 1294-1307. (doi:10.1002/2015JA021567).

Record type: Article

Abstract

We present the first large-scale comparison of the spatial distribution of field-aligned currents as measured by the Active Magnetosphere and Planetary Electrodynamics Response Experiment, with the location and brightness of the average auroral oval, determined from the Imager for Magnetopause-to-Aurora Global Exploration far ultraviolet instrument. These distributions are compared under the same interplanetary magnetic field magnitude and clock angle conditions. The field-aligned currents and auroral oval drop to lower latitudes, as the interplanetary magnetic field becomes both increasingly stronger in magnitude and increasingly southward. We find that the region 2 currents are more closely aligned with the distribution of auroral UV emission, whether that be in the discrete auroral zone about dusk or in the postmidnight diffuse aurora sector. The lack of coincidence between the region 1 field-aligned currents with the auroral oval in the dusk sector is contrary to expectation.

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Carter_et_al-2016-Journal_of_Geophysical_Research-_Space_Physics - Version of Record
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More information

Accepted/In Press date: 20 January 2016
e-pub ahead of print date: 15 February 2016
Published date: February 2016
Keywords: field-aligned currents, auroral oval

Identifiers

Local EPrints ID: 417614
URI: https://eprints.soton.ac.uk/id/eprint/417614
ISSN: 2169-9402
PURE UUID: 937583dd-0f01-44a4-b88a-b3d37a157c40
ORCID for John Coxon: ORCID iD orcid.org/0000-0002-0166-6854

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Date deposited: 07 Feb 2018 17:30
Last modified: 10 Dec 2019 01:33

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