Articles | Volume 36, issue 2
https://doi.org/10.5194/angeo-36-509-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-36-509-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Regular paper
| 
29 Mar 2018
Regular paper |
| 29 Mar 2018
| 29 Mar 2018
The effect of subauroral polarization streams on the mid-latitude thermospheric disturbance neutral winds: a universal time effect
Dept. of Space Physics, School of Electronic Information, Wuhan University, Hubei, 430072, China
Kedeng Zhang
Dept. of Space Physics, School of Electronic Information, Wuhan University, Hubei, 430072, China
National Center for Atmospheric Research, Boulder, CO 80301, USA
Zhichao Zheng
Dept. of Space Physics, School of Electronic Information, Wuhan University, Hubei, 430072, China
Aaron James Ridley
Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, USA
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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.
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Short summary
For subauroral polarization streams (SAPS) commencing at different universal
times (UT), the strongest westward neutral winds exhibit large variations
in amplitudes. The effect of a sine-wave oscillation of SAPS on the neutral wind also exhibits UT variations in association with the solar illumination. The reduction in the electron density and enhancement in the air mass density are strongest when the maximum solar illumination collocates with the SAPS.
For subauroral polarization streams (SAPS) commencing at different universal
times (UT), the...
