English
 
Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Equatorial plasma bubbles developing around sunrise observed by an all-sky imager and global navigation satellite system network during storm time.

Authors

Wu,  Kun
External Organizations;

Xu,  Jiyao
External Organizations;

Yue,  Xinan
External Organizations;

/persons/resource/bear

Xiong,  C.
2.3 Geomagnetism, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Wang,  Wenbin
External Organizations;

Yuan,  Wei
External Organizations;

Wang,  Chi
External Organizations;

Zhu,  Yajun
External Organizations;

Luo,  Ji
External Organizations;

External Ressource
No external resources are shared
Fulltext (public)

5000647.pdf
(Publisher version), 15MB

Supplementary Material (public)
There is no public supplementary material available
Citation

Wu, K., Xu, J., Yue, X., Xiong, C., Wang, W., Yuan, W., Wang, C., Zhu, Y., Luo, J. (2020): Equatorial plasma bubbles developing around sunrise observed by an all-sky imager and global navigation satellite system network during storm time. - Annales Geophysicae, 38, 1, 163-177.
https://doi.org/10.5194/angeo-38-163-2020


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5000647
Abstract
A large number of studies have shown that equatorial plasma bubbles (EPBs) occur mainly after sunset, and they usually drift eastward. However, in this paper, an unusual EPB event was simultaneously observed by an all-sky imager and the global navigation satellite system (GNSS) network in southern China, during the recovery phase of a geomagnetic storm that happened on 6–8 November 2015. Observations from both techniques show that the EPBs appeared near dawn. Interestingly, the observational results show that the EPBs continued to develop after sunrise, and they disappeared about 1 h after sunrise. The development stage of EPBs lasted for at least about 3 h. To our knowledge, this is the first time that the evolution of EPBs developing around sunrise was observed by an all-sky imager and the GNSS network. Our observation showed that the EPBs drifted westward, which was different from the usual eastward drifts of post-sunset EPBs. The simulation from the Thermosphere–Ionosphere–Electrodynamics General Circulation Model (TIE-GCM) suggest that the westward drift of EPBs should be related to the enhanced westward winds at storm time. Besides this, bifurcation and merging processes of EPBs were observed by the all-sky imager in the event. Associated with the development of EPBs, an increase in the peak height of the ionospheric F region was also observed near sunrise, and we suggest the enhanced upward vertical plasma drift during the geomagnetic storm plays a major role in triggering the EPBs near sunrise.