Disappearance of plasmaspheric hiss following interplanetary shock

Plasmaspheric hiss is one of the important plasma waves controlling radiation belt dynamics. Its spatiotemporal distribution and generation mechanism are presently the object of active research. We here give the first report on the shock‐induced disappearance of plasmaspheric hiss observed by the Va...

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Published inGeophysical research letters Vol. 42; no. 9; pp. 3129 - 3140
Main Authors Su, Zhenpeng, Zhu, Hui, Xiao, Fuliang, Zheng, Huinan, Wang, Yuming, Shen, Chao, Zhang, Min, Wang, Shui, Kletzing, C. A., Kurth, W. S., Hospodarsky, G. B., Spence, H. E., Reeves, G. D., Funsten, H. O., Blake, J. B., Baker, D. N., Wygant, J. R.
Format Journal Article
LanguageEnglish
Published Washington Blackwell Publishing Ltd 16.05.2015
John Wiley & Sons, Inc
Subjects
Active control
Chorus waves
cyclotron instability
cyclotron resonance
Damping
Dynamics
Electric power distribution
Electron density
Electron flux
Fluxes
Geophysics
Hiss
interplanetary shock
Landau damping
Magnetic fields
Magnetopause
Plasma
Plasma waves
Plasmasphere
plasmaspheric hiss
Probes
Radiation
radiation belt
Sensors
Shock
Spatial distribution
Temporal variations
Variability
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Summary:Plasmaspheric hiss is one of the important plasma waves controlling radiation belt dynamics. Its spatiotemporal distribution and generation mechanism are presently the object of active research. We here give the first report on the shock‐induced disappearance of plasmaspheric hiss observed by the Van Allen Probes on 8 October 2013. This special event exhibits the dramatic variability of plasmaspheric hiss and provides a good opportunity to test its generation mechanisms. The origination of plasmaspheric hiss from plasmatrough chorus is suggested to be an appropriate prerequisite to explain this event. The shock increased the suprathermal electron fluxes, and then the enhanced Landau damping promptly prevented chorus waves from entering the plasmasphere. Subsequently, the shrinking magnetopause removed the source electrons for chorus, contributing significantly to the several‐hours‐long disappearance of plasmaspheric hiss. Key Points First report on shock‐induced disappearance of plasmaspheric hiss Interruption of chorus access into plasmasphere by enhanced Landau damping Removal of source electrons for chorus by the shrinking magnetopause
Bibliography:NASA Prime - No. NAS5-01072
istex:0D4A1225C41CD8FE7B68CC1F49200BDF363980F9
ArticleID:GRL52787
National Natural Science Foundation of China - No. 41274169; No. 41274174; No. 41422405; No. 41174125; No. 41131065; No. 41121003; No. 41074120; No. 41231066; No. 41304134
JHU/APL - No. 921647; No. 967399; No. 922613
National Key Basic Research Special Foundation of China - No. 2011CB811403
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Chinese Academy of Sciences - No. KZCX2-EW-QN510; No. KZZD-EW-01-4
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0094-8276
1944-8007
DOI:10.1002/2015GL063906