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The Magnetospheric Driving Source of Double-Peak Subauroral Ion Drifts: Double Ring Current Pressure Peaks
wei, Dong1; Yu, Yiqun1; He, Fei2,3
2019-07-16
Source PublicationGEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
Volume46Issue:13Pages:7079-7087
AbstractDouble-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.
DOI10.1029/2019GL083186
Funding OrganizationNSFC ; 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
WOS KeywordFIELD-ALIGNED CURRENTS ; FREJA SATELLITE ; STORM ; SAPS ; CONVECTION ; MODEL ; TOOL
Language英语
Funding ProjectNSFC[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
Funding OrganizationNSFC ; 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
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000476960100002
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/92960
Collection地球与行星物理院重点实验室
Corresponding AuthorYu, Yiqun
Affiliation1.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
Recommended Citation
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.
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