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Volume 35, issue 6
Ann. Geophys., 35, 1249–1268, 2017
https://doi.org/10.5194/angeo-35-1249-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 35, 1249–1268, 2017
https://doi.org/10.5194/angeo-35-1249-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Regular paper 27 Nov 2017

Regular paper | 27 Nov 2017

Global characteristics of auroral Hall currents derived from the Swarm constellation: dependences on season and IMF orientation

Tao Huang et al.
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Cited articles  
Ahn, B.-H., Emery, B. A., Kroehl, H. W., and Kamide, Y.: Climatological characteristics of the auroral ionosphere in terms of electric field and ionospheric conductance, J. Geophys. Res.-Space, 104, 10031–10040, https://doi.org/10.1029/1999JA900043, 1999.
Anderson, B. J., Korth, H., Waters, C. L., Green, D. L., and Stauning, P.: Statistical Birkeland current distributions from magnetic field observations by the Iridium constellation, Ann. Geophys, 26, 671–687, https://doi.org/10.5194/angeo-26-671-2008, 2008.
Belehaki, A. and Rostoker, G.: Relationship between the dayside auroral electrojets and the DPY current, J. Geophys. Res.-Space, 101, 2397–2414, https://doi.org/10.1029/95JA02390, 1996.
Carter, J. A., Milan, S. E., Coxon, J. C., Walach, M.-T., and Anderson, B. J.: Average field-aligned current configuration parameterized by solar wind conditions, J. Geophys. Res.-Space, 121, JA021567, https://doi.org/10.1002/2015JA021567, 2016.
Christiansen, F., Papitashvili, V. O., and Neubert, T.: Seasonal variations of high-latitude field-aligned currents inferred from Ørsted and Magsat observations, J. Geophys. Res.-Space, 107, 13 pp., https://doi.org/10.1029/2001JA900104, 2002.
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This is the first study considering ionospheric currents (both field-aligned current and Hall current) derived from high-resolution magnetic field data of the Swarm constellation in both hemispheres. The prominent auroral electrojets are found to be closely controlled by the solar wind input, but we find no dependence of their intensity on the IMF By orientation. An important finding is that all the IMF By dependences of FACs and Hall currents practically disappear in the dark winter hemisphere.
This is the first study considering ionospheric currents (both field-aligned current and Hall...
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