The Magnetospheric Driving Source of Double-Peak Subauroral Ion Drifts: Double Ring Current Pressure Peaks

doi:10.1029/2019GL083186

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院地球与行星物理重点实验室

	The Magnetospheric Driving Source of Double-Peak Subauroral Ion Drifts: Double Ring Current Pressure Peaks
	wei, Dong 1; Yu, Yiqun 1; He, Fei 2,3
刊名	GEOPHYSICAL RESEARCH LETTERS
	2019-07-16
卷号	46 期号:13 页码:7079-7087
ISSN号	0094-8276
DOI	10.1029/2019GL083186
英文摘要	Double-peak subauroral ion drifts (DSAIDs), characterized by two high-speed flow channels, is a newly identified flow structure in the subauroral ionosphere. He et al. (2016, https:// doi. org/10.1002/2016GL069133) proposed that two region 2 field-aligned currents (R2 FACs) might cause the DSAIDs. However, the underlying physical process that drives the double R2 FACs is unknown. This study reports a DSAIDs event and reveals its magnetospheric drivers. Defense Meteorological Satellite Program F18 satellite observed DSAIDs in the duskside subauroral region, which corresponded well to two low-density troughs and two R2 FACs. The Van Allen Probe B demonstrated that intense substorm ion injections recurrently occurred prior to the formation of DSAIDs, suggesting a potential magnetospheric driver of DSAIDs. Simulation confirms that recurrent ion injections intensify the partial ring current and create double pressure peaks in the near-Earth dusk-to-midnight region, leading two R2 FACs to flow into the ionosphere. The two R2 FACs are thus responsible for the DSAIDs formation. This study unveils the generation mechanism of DSAIDs and deepens the knowledge of the complex magnetosphere-ionosphere system.
资助项目	NSFC[41574156] ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund (the second phase)[U1501501] ; Chinese Program for Thousands Young Talents
WOS关键词	FIELD-ALIGNED CURRENTS ; FREJA SATELLITE ; STORM ; SAPS ; CONVECTION ; MODEL ; TOOL
WOS研究方向	Geology
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000476960100002
资助机构	NSFC ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund (the second phase) ; Chinese Program for Thousands Young Talents ; NSFC ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund (the second phase) ; Chinese Program for Thousands Young Talents ; NSFC ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund (the second phase) ; Chinese Program for Thousands Young Talents ; NSFC ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund (the second phase) ; Chinese Program for Thousands Young Talents
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/92960]
专题	地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者	Yu, Yiqun
作者单位	1.Beihang Univ, Sch Space & Environm, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China 3.Chinese Acad Sci, Inst Earth Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	wei, Dong,Yu, Yiqun,He, Fei. The Magnetospheric Driving Source of Double-Peak Subauroral Ion Drifts: Double Ring Current Pressure Peaks[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(13):7079-7087.
APA	wei, Dong,Yu, Yiqun,&He, Fei.(2019).The Magnetospheric Driving Source of Double-Peak Subauroral Ion Drifts: Double Ring Current Pressure Peaks.GEOPHYSICAL RESEARCH LETTERS,46(13),7079-7087.
MLA	wei, Dong,et al."The Magnetospheric Driving Source of Double-Peak Subauroral Ion Drifts: Double Ring Current Pressure Peaks".GEOPHYSICAL RESEARCH LETTERS 46.13(2019):7079-7087.