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  2. 地质与地球物理研究所
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  4. 中国科学院地球与行星物理重点实验室
The distribution of oscillation frequency of magnetic field and plasma parameters in BBFs: THEMIS statistics

文献类型：期刊论文

作者Wu, Qi1,2,3,4; Du, A. M.1,2; Volwerk, M.5; Tsurutani, B. T.6; Ge, Y. S.1,2
刊名JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
出版日期2017-04-01
卷号122期号:4页码:4325-4334
ISSN号2169-9380
DOI10.1002/2016JA023089
文献子类Article
英文摘要Bursty bulk flows (BBFs) have been correlated with Pi2 pulsations and damping oscillations of plasma velocity in many investigations. But the oscillation time scales in BBFs are still an open question. The purpose of this study is to statistically study the oscillated frequency distribution of magnetic field and plasma parameters inside BBFs. The data are obtained by the Time History of Events and Macroscale Interactions during Substorms (THEMIS) probes during the period of 2008 to 2011. For 424 selected BBF events, we use the wavelet spectrum analysis to select the main, second, and third period components of the magnetic field and plasma parameters according to their largest, second, and third largest values of the wavelet power spectral density, respectively. The power spectra show repeated information in the form of multiple peaks or oscillations. The quasi-Gaussian distribution is a good model for the occurrences of the main and secondary periods. The most probable main periods of the magnetic field and plasma parameters are between 143 s and 160 s, which are located in the frequency band of Pi2 and Pi3 pulsations. The second and third period ranges from 63 s to 70 s and from 34 s to 37 s, respectively. Main periods of these parameters change little with the radial distance. We conclude that periods of these parameters are formed at the beginning of BBF history. Although the distribution model cannot give the dynamic processes, it identifies the intrinsic frequencies in oscillations of magnetic field and ion velocity inside of BBFs.
WOS关键词BURSTY BULK FLOWS ; HIGH-SPEED FLOWS ; PI2 PULSATIONS ; SUBSTORM ONSET ; SHEET ; MAGNETOTAIL ; BRAKING ; RECONNECTION ; MECHANISM ; DYNAMICS
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000401340800030
出版者AMER GEOPHYSICAL UNION
资助机构National Basic Research Program of China(2014CB845903 ; National Basic Research Program of China(2014CB845903 ; National Natural Science Foundation of China(41174122) ; National Natural Science Foundation of China(41174122) ; Natural Science Foundation of China(41574162 ; Natural Science Foundation of China(41574162 ; NASA(NAS5-02099) ; NASA(NAS5-02099) ; German Ministry for Economy and Technology ; German Ministry for Economy and Technology ; German Center for Aviation and Space (DLR)(50 OC 0302) ; German Center for Aviation and Space (DLR)(50 OC 0302) ; 2012CB825604) ; 2012CB825604) ; 41204122) ; 41204122) ; National Basic Research Program of China(2014CB845903 ; National Basic Research Program of China(2014CB845903 ; National Natural Science Foundation of China(41174122) ; National Natural Science Foundation of China(41174122) ; Natural Science Foundation of China(41574162 ; Natural Science Foundation of China(41574162 ; NASA(NAS5-02099) ; NASA(NAS5-02099) ; German Ministry for Economy and Technology ; German Ministry for Economy and Technology ; German Center for Aviation and Space (DLR)(50 OC 0302) ; German Center for Aviation and Space (DLR)(50 OC 0302) ; 2012CB825604) ; 2012CB825604) ; 41204122) ; 41204122) ; National Basic Research Program of China(2014CB845903 ; National Basic Research Program of China(2014CB845903 ; National Natural Science Foundation of China(41174122) ; National Natural Science Foundation of China(41174122) ; Natural Science Foundation of China(41574162 ; Natural Science Foundation of China(41574162 ; NASA(NAS5-02099) ; NASA(NAS5-02099) ; German Ministry for Economy and Technology ; German Ministry for Economy and Technology ; German Center for Aviation and Space (DLR)(50 OC 0302) ; German Center for Aviation and Space (DLR)(50 OC 0302) ; 2012CB825604) ; 2012CB825604) ; 41204122) ; 41204122) ; National Basic Research Program of China(2014CB845903 ; National Basic Research Program of China(2014CB845903 ; National Natural Science Foundation of China(41174122) ; National Natural Science Foundation of China(41174122) ; Natural Science Foundation of China(41574162 ; Natural Science Foundation of China(41574162 ; NASA(NAS5-02099) ; NASA(NAS5-02099) ; German Ministry for Economy and Technology ; German Ministry for Economy and Technology ; German Center for Aviation and Space (DLR)(50 OC 0302) ; German Center for Aviation and Space (DLR)(50 OC 0302) ; 2012CB825604) ; 2012CB825604) ; 41204122) ; 41204122)
源URL[http://ir.iggcas.ac.cn/handle/132A11/52911]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Du, A. M.
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Fuyang Normal Univ, Sch Phys & Elect Engn, Fuyang, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
5.Austrian Acad Sci, Space Res Inst, Graz, Austria
6.CALTECH, Jet Prop Lab, Pasadena, CA USA
推荐引用方式
GB/T 7714		 Wu, Qi,Du, A. M.,Volwerk, M.,et al. The distribution of oscillation frequency of magnetic field and plasma parameters in BBFs: THEMIS statistics[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2017,122(4):4325-4334.
APA Wu, Qi,Du, A. M.,Volwerk, M.,Tsurutani, B. T.,&Ge, Y. S..(2017).The distribution of oscillation frequency of magnetic field and plasma parameters in BBFs: THEMIS statistics.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,122(4),4325-4334.
MLA Wu, Qi,et al."The distribution of oscillation frequency of magnetic field and plasma parameters in BBFs: THEMIS statistics".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 122.4(2017):4325-4334.

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来源：地质与地球物理研究所

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