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磁尾爆发性整体流和地磁Pi2脉动关系研究
Alternative TitleRelations Between Magnetotail BBF and Pit Pulsations
曹晋滨; 段俊涛; 马玉端; 杨冬梅; 北京8701信箱
Department空间天气学国家重点实验室
Source Publication空间科学学报
2007
Volume27Issue:6Pages:467-473
ISSN0254-6124
Language中文
KeywordPi2脉动 爆发性整体流
Abstract利用Cluster,TC-1以及中国和欧洲在中低纬六个地面台站的数据,分析了2004年10月22日1700-1930UT发生的三次BBF事件过程中地面和近地空间磁场脉动的特性.这三次BBF事件都发生在地磁活动的平静时期.结果发现,有两次平静时期的BBF确实对应着阻尼型Pi2脉动,并且脉动的特征与以前观测结果中的特征类似.在第一次BBF事件中,空间观测和地面观测均发现了Pi2脉动;在第二次事件中,地面观测到了Pi2脉动,而空间没有观测到Pi2脉动;在第三次事件中,空间和地面观测都没有发现Pi2脉动.这些观测事实说明BBF所激发的Pi2脉动特征是相当复杂的,而且并不是所有BBF都能产生Pi2脉动,所以到底BBF在什么条件下可以产生Pi2仍然是一个没有解决的问题.
Other AbstractRecent observations show that there is a close correlation between BBFs (bursty bulk flows) and mid-low latitude Pit pulsations. However the relation between BBFs and Pit pulsations remains an unsettled open question.In this paper, by using the data of Cluster, TC-1/DSP and six ground stations (Dedu, Taian, Kashi from China and Castello Tesino, Ranchio, Nagycenk from Europe), three BBF events were analyzed that occurred during magnetic quiet times from 1700 UT to 1930 UT on October 22,2004.It is found that two of BBF events can excite Pits.The Pits appeared simultaneously The Pits in H components at six ground stations have almost the same starting time,same period (about 60 s) and same waveform.The characteristics of relevant Pits are consistent with those of cavity mode.For the first BBFs, TC-1 inside the plasmasphere observed a Pit event.However for the second BBF, TC-1 did not observe any Pit signature.During the third BBF event,both ground and space observation show there no pi2s.Thus it can be concluded that not all BBFs can excite Pi2s.What kind of BBFs can excite the Pi2 remains an open question.
Indexed ByCSCD
Funding Project中国科学院空间科学与应用研究中心
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1336
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
曹晋滨,段俊涛,马玉端,等. 磁尾爆发性整体流和地磁Pi2脉动关系研究[J]. 空间科学学报,2007,27(6):467-473.
APA 曹晋滨,段俊涛,马玉端,杨冬梅,&北京8701信箱.(2007).磁尾爆发性整体流和地磁Pi2脉动关系研究.空间科学学报,27(6),467-473.
MLA 曹晋滨,et al."磁尾爆发性整体流和地磁Pi2脉动关系研究".空间科学学报 27.6(2007):467-473.
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