Articles | Volume 31, issue 9
https://doi.org/10.5194/angeo-31-1521-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/angeo-31-1521-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Regular paper
| 
06 Sep 2013
Regular paper |
| 06 Sep 2013
Seasonal variation of the ion upflow in the topside ionosphere during SAPS (subauroral polarization stream) periods
Dept. of Space Physics, School of Electronic Information, Wuhan University, Wuhan 430072, China
Helmholtz Centre Potsdam – GFZ, German Research Center for Geosciences, 14473 Potsdam, Germany
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For subauroral polarization streams (SAPS) commencing at different universal
times (UT), the strongest westward neutral winds exhibit large variations
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Extreme meteorological events such as SSWs induce variabilities in the ionosphere by modulating the atmospheric tides, and these variabilities can be comparable to a moderate geomagnetic storm. The equatorial electrojet (EEJ) is a narrow ribbon of current flowing over the dip equator in the ionosphere and is particularly sensitive to tidal changes. In this study, we use ground-magnetic measurements to investigate the semidiurnal solar and lunar tidal variabilities of the EEJ during SSWs.
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