Preprints
https://doi.org/10.5194/angeo-2021-55
https://doi.org/10.5194/angeo-2021-55

  03 Nov 2021

03 Nov 2021

Review status: this preprint is currently under review for the journal ANGEO.

Statistical Study and Corresponding Evolution of Plasmaspheric Plumes under Different Levels of Geomagnetic Storms

Haimeng Li1, Tongxing Fu1, Rongxin Tang1,2, Zhigang Yuan3, Zhihai Ouyang1, and Xiaohua Deng1 Haimeng Li et al.
  • 1Institute of Space Science and Technology, Nanchang University, Nanchang, China
  • 2Jiangxi Provincial Key Laboratory of Interdisciplinary Science, Nanchang University, Nanchang, China
  • 3School of Electronic Information, Wuhan University, Wuhan, China

Abstract. Using observations of Van Allen Probes, we present a statistical study of plasmaspheric plumes in the inner magnetosphere. Plasmaspheric plumes tend to occur during the recovery phase of geomagnetic storms. Furthermore, the results imply that the occurrence rate of observed plasmaspheric plume in the inner magnetosphere is larger during stronger geomagnetic activity. This statistical result is different from the observations of the Cluster satellite with much higher L-shells in most orbital period, which suggest that the plasmaspheric plume near the magnetopause tends to be observed during moderate geomagnetic activity (Lee et al., 2016). In the following, the dynamic evolutions of plasmaspheric plumes during a moderate geomagnetic storm in February 2013 and a strong geomagnetic storm in May 2013 are simulated through group test particle simulation. It is obvious that the plasmaspheric particles drift out on open convection paths due to sunward convection during both geomagnetic storms. It seems that the outer plasmaspheric particles exhaust sooner and the plasmasphere shrinks faster during strong geomagnetic storms. As a result, the longitudinal width of the plume is narrower and the plume is limited to lower L-shells during the recovery phase of strong geomagnetic storm. The simulated evolution may provide a possible interpretation for the occurrence rates: Van Allen Probes tend to observe plumes during stronger geomagnetic storms, and the Cluster satellite with higher L-shells tends to observe plumes during moderate geomagnetic storms.

Haimeng Li et al.

Status: open (until 15 Dec 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse

Haimeng Li et al.

Haimeng Li et al.

Viewed

Total article views: 240 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
220 19 1 240 0 0
  • HTML: 220
  • PDF: 19
  • XML: 1
  • Total: 240
  • BibTeX: 0
  • EndNote: 0
Views and downloads (calculated since 03 Nov 2021)
Cumulative views and downloads (calculated since 03 Nov 2021)

Viewed (geographical distribution)

Total article views: 281 (including HTML, PDF, and XML) Thereof 281 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 04 Dec 2021
Download
Short summary
The plasmaspheric plume is an important region of ‘detached plasma elements‘ and provides an effective coupling channel of energy/mass between the inner magnetospheric plasmasphere and outer magnetosphere. In the study, using VAP data, we present a statistical result of plasmaspheric plumes in the inner magnetosphere, which implies that the plumes tend to occur during the recovery phase of geomagnetic storms, and the occurrence rate is larger during stronger geomagnetic activity.