Characteristics of middle- to low-latitude Pi2 excited by bursty bulk flows

doi:10.1029/2007JA012629

	Characteristics of middle- to low-latitude Pi2 excited by bursty bulk flows
	Cao, Jinbin 1; Duan, Juntao 1; Du, Aiming 2; Ma, Yuduan 1; Liu, Zhenxin 1; Zhou, G. C.1; Yang, Dongmei 3; Zhang, Tielong 4; Li, Xinlin 5,6; Vellante, Massimo 7
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2008-05-29
卷号	113 期号:A7
ISSN号	0148-0227
DOI	10.1029/2007JA012629
文献子类	Article
英文摘要	This paper, by using the data of Cluster, TC-1, GOES, and eight ground stations on 22 October 2004, studied the characteristics of low-latitude Pi2s generated by an earthward bursty bulk flow ( BBF) in the near-Earth tail plasma sheet. The BBF excited simultaneously two distinct classes of Pi2s: one is long-period Pi2 ( 90-130 s) and the other is short-period Pi2 ( similar to 50s). The long-period Pi2 is transient response type Pi2 associated with field-aligned current produced by the braking of BBFs. The spectrum analysis show that the amplitude spectrum peak of long-period Pi2 increases with increasing latitude, indicating that the source is at higher latitudes. The time delay for the propagation of Alfven waves from Cluster to the Earth is very close to the time difference between the onset time of the BBFs at Cluster and the starting time of the long-period Pi2 on the ground. The short-period Pi2 is a global cavity mode since the Pi2s in H components at eight stations have almost the same starting time, same oscillation period, and same waveform, which are all typical characteristics of cavity mode. The amplitude spectrum peak of short-period Pi2 at NCK (N42.7) is larger than those at higher-station UPS (N56.5) and lower-station CST (N40.8). The polarization analysis at three lower-latitude stations shows that the polarization underwent two reversals. The major axis of the polarization ellipse points to approximately the north, indicating that the short-period Pi2s are not excited by nightside current system. TC-1 observed transverse mode Pi2s. Its period is almost identical with the periods of Pi2 on the ground, indicating they belong to the same wave.
WOS关键词	MAGNETIC PULSATIONS ; PLASMA SHEET ; MAGNETOSPHERE ; SUBSTORM ; SATELLITE ; PROPAGATION ; GENERATION ; DYNAMICS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000256362200001
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/69040]
专题	中国科学院地质与地球物理研究所
通讯作者	Cao, Jinbin
作者单位	1.CSSAR, Key Lab Space Weather, Beijing 100080, Peoples R China 2.CAS, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.CEA, Inst Geophys, Beijing 100081, Peoples R China 4.Austrian Acad Sci, Space Res Inst, A-8042 Graz, Austria 5.Univ Colorado, Dept Aerosp Engn Sci, Boulder, CO 80309 USA 6.Univ Colorado, LASP, Boulder, CO 80309 USA 7.Univ Aquila, Dipartimento Fis, I-67010 Coppito, Italy 8.Ctr Etud Spatiale Rayonnements, F-31028 Toulouse, France 9.Univ London Imperial Coll Sci Technol & Med, London SW7 2BZ, England 10.Univ Massachusetts, Ctr Atomospher Res, Lowell, MA 02215 USA
推荐引用方式 GB/T 7714	Cao, Jinbin,Duan, Juntao,Du, Aiming,et al. Characteristics of middle- to low-latitude Pi2 excited by bursty bulk flows[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2008,113(A7).
APA	Cao, Jinbin.,Duan, Juntao.,Du, Aiming.,Ma, Yuduan.,Liu, Zhenxin.,...&Li, Qi.(2008).Characteristics of middle- to low-latitude Pi2 excited by bursty bulk flows.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,113(A7).
MLA	Cao, Jinbin,et al."Characteristics of middle- to low-latitude Pi2 excited by bursty bulk flows".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 113.A7(2008).