Proton auroral intensification induced by interplanetary shock on 7 November 2004

	Proton auroral intensification induced by interplanetary shock on 7 November 2004
	Su, Zhenpeng; Zong, Qiu-Gang; Yue, Chao; Wang, Yongfu; Zhang, Hui; Zheng, Huinan
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2011
卷号	116 页码:A08223
ISSN号	0148-0227
通讯作者	Su, ZP (reprint author), Univ Sci & Technol China, Chinese Acad Sci Key Lab Basic Plasma Phys, Sch Earth & Space Sci, Hefei 230026, Anhui, Peoples R China.
中文摘要	We report a shock-induced auroral intensification event observed by the IMAGE spacecraft on 7 November 2004. The comparison of simultaneous auroral snapshots, obtained from FUV-SI12 and FUV-SI13 cameras onboard IMAGE spacecraft, indicates the dominance of proton precipitation (rather than electron precipitation) throughout the auroral oval region. The proton aurora in the postnoon sector showed the most significant intensification, with luminosity increasing by 5 times or more. We describe the main characteristics of interplanetary parameters observed by the ACE and Geotail satellites and plasma parameters within the mapped precipitation region detected by the Los Alamos National Laboratory 1990-1995 satellite. The generation mechanism of postnoon proton auroral intensification is further investigated on the basis of these observations. The estimated increase of loss cone size was not enough to produce the required proton auroral precipitation enhancement. The expected oxygen band electromagnetic ion cyclotron waves (no available observation), in the highly fluctuating density region during the shock period, might contribute to the enhanced precipitation of auroral protons. Our new finding is that the shock-driven buildup of 1-10 keV proton fluxes could account for the observed proton auroral intensification.
英文摘要	We report a shock-induced auroral intensification event observed by the IMAGE spacecraft on 7 November 2004. The comparison of simultaneous auroral snapshots, obtained from FUV-SI12 and FUV-SI13 cameras onboard IMAGE spacecraft, indicates the dominance of proton precipitation (rather than electron precipitation) throughout the auroral oval region. The proton aurora in the postnoon sector showed the most significant intensification, with luminosity increasing by 5 times or more. We describe the main characteristics of interplanetary parameters observed by the ACE and Geotail satellites and plasma parameters within the mapped precipitation region detected by the Los Alamos National Laboratory 1990-1995 satellite. The generation mechanism of postnoon proton auroral intensification is further investigated on the basis of these observations. The estimated increase of loss cone size was not enough to produce the required proton auroral precipitation enhancement. The expected oxygen band electromagnetic ion cyclotron waves (no available observation), in the highly fluctuating density region during the shock period, might contribute to the enhanced precipitation of auroral protons. Our new finding is that the shock-driven buildup of 1-10 keV proton fluxes could account for the observed proton auroral intensification.
学科主题	空间物理
收录类别	SCI
资助信息	National Natural Science Foundation of China [40831061]; NASA; Natural Science Foundation; Specialized Research Fund for State Key Laboratories
语种	英语
公开日期	2014-12-15
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/3156]
专题	国家空间科学中心_空间科学部
推荐引用方式 GB/T 7714	Su, Zhenpeng,Zong, Qiu-Gang,Yue, Chao,et al. Proton auroral intensification induced by interplanetary shock on 7 November 2004[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2011,116:A08223.
APA	Su, Zhenpeng,Zong, Qiu-Gang,Yue, Chao,Wang, Yongfu,Zhang, Hui,&Zheng, Huinan.(2011).Proton auroral intensification induced by interplanetary shock on 7 November 2004.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,116,A08223.
MLA	Su, Zhenpeng,et al."Proton auroral intensification induced by interplanetary shock on 7 November 2004".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 116(2011):A08223.