Fast acceleration of inner magnetospheric hydrogen and oxygen ions by shock induced ULF waves

doi:10.1029/2012JA018024

	Fast acceleration of inner magnetospheric hydrogen and oxygen ions by shock induced ULF waves
	Zong, Q. -G.1; Wang, Y. F.1; Zhang, H.2,3; Fu, S. Y.1; Zhang, H.4; Wang, C. R.1; Yuan, C. J.1; Vogiatzis, I.1
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2012-11-14
卷号	117
ISSN号	0148-0227
DOI	10.1029/2012JA018024
文献子类	Article
英文摘要	The interaction between interplanetary shocks and the Earth's magnetosphere manifests in many important space physics phenomena including particle acceleration. We investigated the response of the inner magnetospheric hydrogen and oxygen ions to a strong interplanetary shock impinging on the Earth's magnetosphere. Both hydrogen and oxygen ions are found to be heated/accelerated significantly with their temperature enhanced by a factor of two and three immediately after similar to 1 min and similar to 12 min of the shock arrival respectively. Multiple energy dispersion signatures of ions were found in the parallel and anti-parallel direction to the magnetic field immediately after the interplanetary shock impact. The energy dispersions in the anti-parallel direction preceded those in the parallel direction. Multiple dispersion signatures can be explained by the flux modulations of local ions (rather than the ions from the Earth's ionosphere) by ULF waves. It is found that the energy spectrum from 10 eV to similar to 40 keV are highly correlated with the cross product of observed ULF wave electric and magnetic field (V = (E x B)/B-2), which indicate that both cold plasmaspheric plasma and hot thermal ions (10 eV to similar to 40 keV) are accelerated and decelerated with the various phases of ULF wave electric field. We then demonstrate that ion acceleration due to the interplanetary shock compression on the Earth's magnetic field is rather limited, whereas the major contribution to acceleration comes from the electric field carried by ULF waves via drift-bounce resonance for both the hydrogen and oxygen ions. The integrated hydrogen and oxygen ion flux with the poloidal mode ULF waves are highly coherent (>0.9) whereas the coherence with the toroidal mode ULF waves is negligible, implying that the poloidal mode ULF waves are much more efficient in accelerating hydrogen and oxygen ions in the inner magnetosphere than the toroidal mode ULF waves. The duration of high coherence for oxygen ions with the poloidal mode ULF wave is longer than that for hydrogen ions, indicating that oxygen ions can be heated/accelerated more efficiently by the poloidal mode ULF wave induced by the interplanetary shock.
WOS关键词	FREQUENCY GEOMAGNETIC-PULSATIONS ; STORM SUDDEN COMMENCEMENTS ; CHARGED-PARTICLE BEHAVIOR ; ELECTRON-SCATTERING LOSS ; RADIATION BELT ; SOLAR-WIND ; RELATIVISTIC ELECTRONS ; MAGNETIC-FIELD ; INTERPLANETARY SHOCK ; DRIFT ECHOES
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000311251900005
资助机构	Major Project of Chinese National Programs for Fundamental Research and Development(2012CB825603) ; Major Project of Chinese National Programs for Fundamental Research and Development(2012CB825603) ; National Natural Science Foundation of China(41074117 ; National Natural Science Foundation of China(41074117 ; 41031065 ; 41031065 ; 41150110579) ; 41150110579) ; Major Project of Chinese National Programs for Fundamental Research and Development(2012CB825603) ; Major Project of Chinese National Programs for Fundamental Research and Development(2012CB825603) ; National Natural Science Foundation of China(41074117 ; National Natural Science Foundation of China(41074117 ; 41031065 ; 41031065 ; 41150110579) ; 41150110579) ; Major Project of Chinese National Programs for Fundamental Research and Development(2012CB825603) ; Major Project of Chinese National Programs for Fundamental Research and Development(2012CB825603) ; National Natural Science Foundation of China(41074117 ; National Natural Science Foundation of China(41074117 ; 41031065 ; 41031065 ; 41150110579) ; 41150110579) ; Major Project of Chinese National Programs for Fundamental Research and Development(2012CB825603) ; Major Project of Chinese National Programs for Fundamental Research and Development(2012CB825603) ; National Natural Science Foundation of China(41074117 ; National Natural Science Foundation of China(41074117 ; 41031065 ; 41031065 ; 41150110579) ; 41150110579)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/84232]
专题	中国科学院地质与地球物理研究所
通讯作者	Zong, Q. -G.
作者单位	1.Peking Univ, Inst Space Phys & Appl Technol, Beijing 100871, Peoples R China 2.Univ Alaska Fairbanks, Dept Phys, Fairbanks, AK USA 3.Univ Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775 USA 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Zong, Q. -G.,Wang, Y. F.,Zhang, H.,et al. Fast acceleration of inner magnetospheric hydrogen and oxygen ions by shock induced ULF waves[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2012,117.
APA	Zong, Q. -G..,Wang, Y. F..,Zhang, H..,Fu, S. Y..,Zhang, H..,...&Vogiatzis, I..(2012).Fast acceleration of inner magnetospheric hydrogen and oxygen ions by shock induced ULF waves.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,117.
MLA	Zong, Q. -G.,et al."Fast acceleration of inner magnetospheric hydrogen and oxygen ions by shock induced ULF waves".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 117(2012).