Storm time occurrence and spatial distribution of Pc4 poloidal ULF waves in the inner magnetosphere: A Van Allen Probes statistical study

	Storm time occurrence and spatial distribution of Pc4 poloidal ULF waves in the inner magnetosphere: A Van Allen Probes statistical study
	Dai, Lei; Takahashi, Kazue; Lysak, Robert; Wang, Chi; Wygant, John R.; Kletzing, Craig; Bonnell, John; Cattell, Cynthia A.; Smith, Charles W.; MacDowall, Robert J.
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2015
卷号	120 期号:6 页码:4748-4762
关键词	Pc4 ULF waves poloidal waves geomagnetic storm Van Allen Probe solar wind dynamic pressure ring current
ISSN号	2169-9380
通讯作者	Dai, L (reprint author), Chinese Acad Sci, State Key Lab Space Weather, Ctr Space Sci & Appl Res, Beijing, Peoples R China.
英文摘要	Poloidal ULF waves are capable of efficiently interacting with energetic particles in the ring current and the radiation belt. Using Van Allen Probes (Radiation Belt Storm Probes (RBSP)) data from October 2012 to July 2014, we investigate the spatial distribution and storm time occurrence of Pc4 (7-25mHz) poloidal waves in the inner magnetosphere. Pc4 poloidal waves are sorted into two categories: waves with and without significant magnetic compressional components. Two types of poloidal waves have comparable occurrence rates, both of which are much higher during geomagnetic storms. The noncompressional poloidal waves mostly occur in the late recovery phase associated with an increase of Dst toward 0, suggesting that the decay of the ring current provides their free energy source. The occurrence of dayside compressional Pc4 poloidal waves is found correlated with the variation of the solar wind dynamic pressure, indicating their origin in the solar wind. Both compressional and noncompressional waves preferentially occur on the dayside near noon at L similar to 5-6. In addition, compressional poloidal waves are observed at magnetic local time 18-24 on the nightside. The location of the Pc4 poloidal waves relative to the plasmapause is investigated. The RBSP statistical results may shed light on the in-depth investigations of the generation and propagation of Pc4 poloidal waves.
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/4563]
专题	国家空间科学中心_空间科学部
推荐引用方式 GB/T 7714	Dai, Lei,Takahashi, Kazue,Lysak, Robert,et al. Storm time occurrence and spatial distribution of Pc4 poloidal ULF waves in the inner magnetosphere: A Van Allen Probes statistical study[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2015,120(6):4748-4762.
APA	Dai, Lei.,Takahashi, Kazue.,Lysak, Robert.,Wang, Chi.,Wygant, John R..,...&Chen, Lunjin.(2015).Storm time occurrence and spatial distribution of Pc4 poloidal ULF waves in the inner magnetosphere: A Van Allen Probes statistical study.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,120(6),4748-4762.
MLA	Dai, Lei,et al."Storm time occurrence and spatial distribution of Pc4 poloidal ULF waves in the inner magnetosphere: A Van Allen Probes statistical study".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 120.6(2015):4748-4762.