EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Developing Equatorial Plasma Bubbles Observed by Multi-Instrument at Dawn

Kun Wu1,2, Jiyao Xu1,2, Xinan Yue2,3, Chao Xiong4, Wenbin Wang5, Wei Yuan1,2, Chi Wang1,2, Yajun Zhu1,2, and Ji luo1,2
Kun Wu et al.
  • 1State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing, China
  • 2College of Earth Sciences, University of Chinese Academy of Sciences, Beijing, China
  • 3Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China
  • 4GFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, Germany.
  • 5High Altitude Observatory, National Center for Atmospheric Research, Boulder, CO, USA

Previous studies have shown that equatorial plasma bubbles (EPBs) usually occur after sunset, and they usually drift eastward. Observations from an all-sky imager and the Global Navigation Satellite Systems (GNSS) network in southern China showed a special EPB event. Observational results show that the EPBs appeared near dawn and continued to develop after sunrise. They disappeared about one hour after sunrise which the life time of those EPBs exceeds 3 hours. The result provided an evidence that the EPB could develop around sunrise in optical observation. Meanwhile, those observation showed that the EPBs drifted westward, which was different from the usually eastward drifts of EPBs. The simulation from TIE-GCM model suggest that the westward drift of EPBs should be related to the enhanced westward winds at storm time. Besides, increasing in the ionospheric F region peak height was also observed near sunrise. We suggest enhance upward vertical plasma drift during geomagnetic storm plays a major role in triggering the EPBs near sunrise.

How to cite: Wu, K., Xu, J., Yue, X., Xiong, C., Wang, W., Yuan, W., Wang, C., Zhu, Y., and luo, J.: Developing Equatorial Plasma Bubbles Observed by Multi-Instrument at Dawn, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-1457,, 2021.

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