scholarly journals Equatorial Plasma Bubbles Developing Around Sunrise Observed by an All-Sky Imager and GNSS Network during the Storm Time

2019 ◽  
Author(s):  
Kun Wu ◽  
Jiyao Xu ◽  
Xinan Yue ◽  
Chao Xiong ◽  
Wenbin Wang ◽  
...  
Keyword(s):  
Geomagnetic Storm ◽  
Southern China ◽  
Recovery Phase ◽  
Peak Height ◽  
Development Stage ◽  
Global Navigation Satellite Systems ◽  
Plasma Bubbles ◽  
Equatorial Plasma Bubbles ◽  
Sky Imager ◽  
Gnss Network

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 Systems (GNSS) network in southern China, during the recovery phase of geomagnetic storm 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 disappeared about one hour after sunrise. The development stage of EPBs lasted for at least about 3 hours. 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 usually eastward drifts of post-sunset 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, break and recombination processes of EPBs were observed by the all-sky imager in the event. Associated with the development of EPBs, increasing in the ionospheric F region peak height was also observed near sunrise, and we suggest the enhance upward vertical plasma drift during geomagnetic storm plays a major role in triggering the EPBs near sunrise.

Developing Equatorial Plasma Bubbles Observed by Multi-Instrument at Dawn

2021 ◽  
Author(s):  
Kun Wu ◽  
Jiyao Xu ◽  
Xinan Yue ◽  
Chao Xiong ◽  
Wenbin Wang ◽  
...  
Keyword(s):  
Southern China ◽  
Life Time ◽  
Peak Height ◽  
Global Navigation Satellite Systems ◽  
Satellite Systems ◽  
Plasma Bubbles ◽  
F Region ◽  
Equatorial Plasma Bubbles ◽  
Gnss Network ◽  
Global Navigation Satellite

<p>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.</p>

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

2020 ◽  
Vol 38 (1) ◽  
pp. 163-177
Author(s):  
Kun Wu ◽  
Jiyao Xu ◽  
Xinan Yue ◽  
Chao Xiong ◽  
Wenbin Wang ◽  
...  
Keyword(s):  
Geomagnetic Storm ◽  
Global Navigation Satellite System ◽  
Satellite System ◽  
Navigation Satellite ◽  
Plasma Bubbles ◽  
Equatorial Plasma Bubbles ◽  
Global Navigation ◽  
Sky Imager ◽  
Gnss Network ◽  
Global Navigation Satellite

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.

Variation in occurrence of equatorial plasma bubbles (EPBs) using All Sky Imager from low latitude station Kolhapur (16.8 °N, 74.2 °E, 10.6° dip. Lat.)

2017 ◽  
Vol 60 (11) ◽  
pp. 2452-2463 ◽  
Author(s):  
A.K. Sharma ◽  
O.B. Gurav ◽  
G.A. Chavan ◽  
H.P. Gaikwad ◽  
R.N. Ghodpage ◽  
...  
Keyword(s):  
Low Latitude ◽  
Plasma Bubbles ◽  
Latitude Station ◽  
Equatorial Plasma Bubbles ◽  
Sky Imager

Study of equatorial plasma bubbles using all sky imager and scintillation technique from Kolhapur station: a case study

2018 ◽  
Vol 363 (4) ◽  
Author(s):  
A. K. Sharma ◽  
O. B. Gurav ◽  
H. P. Gaikwad ◽  
G. A. Chavan ◽  
D. P. Nade ◽  
...  
Keyword(s):  
Plasma Bubbles ◽  
Equatorial Plasma Bubbles ◽  
Sky Imager

scholarly journals Semimonthly oscillation observed in the start times of equatorial plasma bubbles

2020 ◽  
Vol 38 (2) ◽  
pp. 437-443
Author(s):  
Igo Paulino ◽  
Ana Roberta Paulino ◽  
Ricardo Y. C. Cueva ◽  
Ebenezer Agyei-Yeboah ◽  
Ricardo Arlen Buriti ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Case Studies ◽  
Lunar Tide ◽  
Plasma Bubbles ◽  
Equatorial Plasma Bubbles ◽  
Sky Imager

Abstract. Using airglow data from an all-sky imager deployed at São João do Cariri (7.4∘ S, 36.5∘ W), the start times of equatorial plasma bubbles was studied in order to investigate the day-to-day variability of this phenomenon. Data from a period over 10 years were analyzed from 2000 to 2010. Semimonthly oscillations were clearly observed in the start times of plasma bubbles from OI6300 airglow images during this period of observation, and four case studies (September 2003, September–October 2005, November 2005 and January 2008) were chosen to show in detail this kind of modulation. Since the airglow measurements are not continuous in time, more than one cycle of oscillation in the start times of plasma bubbles cannot be observed from these data. Thus, data from a digisonde at São Luís (2.6∘ S, 44.2∘ W) in November 2005 were used to corroborate the results. Technical/climate issues did not allow one to observe the semimonthly oscillations simultaneously by the two instruments, but from October to November 2005 there was a predominance of this oscillation in the start times of the irregularities over Brazil. Besides, statistical analysis for the data in the whole period of observation has shown that the lunar tide, which has semimonthly variability, is likely the main forcing for the semimonthly oscillation in the start times of equatorial plasma bubbles. The presence of this oscillation can contribute to the day-to-day variability of equatorial plasma bubbles.

scholarly journals Observations of equatorial plasma bubbles during the geomagnetic storm of October 2016

2021 ◽  
Vol 5 (5) ◽  
pp. 1-11
Author(s):  
FuQing Huang ◽  
◽  
JiuHou Lei ◽  
Chao Xiong ◽  
JiaHao Zhong ◽  
...  
Keyword(s):  
Geomagnetic Storm ◽  
Plasma Bubbles ◽  
Equatorial Plasma Bubbles

scholarly journals Observations of equatorial plasma bubbles using a low-cost 630.0-nm all-sky imager in Ishigaki Island, Japan

2020 ◽  
Vol 72 (1) ◽  
Author(s):  
Keisuke Hosokawa ◽  
Kohei Takami ◽  
Susumu Saito ◽  
Yasunobu Ogawa ◽  
Yuichi Otsuka ◽  
...  
Keyword(s):  
Low Cost ◽  
Plasma Bubbles ◽  
Ishigaki Island ◽  
Equatorial Plasma Bubbles ◽  
Sky Imager
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