IGGCAS OpenIR  > 地球与行星物理院重点实验室
The High-Latitude Trough in the Southern Hemisphere Observed by Swarm-A Satellite
Yang, Na1,2; Yu, Tao1; Le, Huijun3,4,5,6; Liu, Libo3,4,5,6; Sun, Yang-Yi1; Xia, Chunliang1; Zuo, Xiaomin1; Yan, Xiangxiang1; Wang, Jin1
2019-11-16
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
ISSN2169-9380
Pages11
AbstractBased on the electron density, field-aligned currents (FACs) and ion drift velocity data from the Swarm-A satellite during 2013-2018, we investigate the features of the high-latitude trough in the Southern Hemisphere. The results show that the high-latitude trough in the Southern Hemisphere is a persistent postmidnight feature in winter. It is observed mainly in the eastern longitudes under low solar activity conditions and in a smaller longitudinal range under high solar activity conditions. The high-latitude trough moves to higher latitudes at later local times, which is more obvious under low solar activity conditions. We also find that the features of FACs and ion drift velocity distribution in the high-latitude trough region depend on longitude. In the longitude sector of 0 degrees-70 degrees E, the high-latitude trough positions are always located at the poleward boundary of the downward FAC region, and collocated with the convection reversal boundary in the postmidnight region. In the longitude sector of 80 degrees-130 degrees E, the high-latitude trough positions are located at the poleward boundary of the downward FAC region in the midnight region and at the strong westward or antisunward ion flow region in the postmidnight region. It is suggested that the high-latitude trough formation and evolution is possibly associated with downward FACs, flow stagnation in the convection reversal boundary, and westward or antisunward ion flow.
Keywordhigh-latitude trough downward FACs ion drift velocity convection reversal boundary
DOI10.1029/2019JA027169
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Key Laboratory of Space Weather ; Key Laboratory of Space Weather ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Key Laboratory of Space Weather ; Key Laboratory of Space Weather ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Key Laboratory of Space Weather ; Key Laboratory of Space Weather ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Key Laboratory of Space Weather ; Key Laboratory of Space Weather
WOS KeywordFIELD-ALIGNED CURRENTS ; WINTER F-REGION ; MIDLATITUDE TROUGH ; IONOSPHERIC TROUGH ; IONIZATION TROUGHS ; ELECTRIC-FIELDS ; ION DRIFT ; CONVECTION ; ELECTRODYNAMICS ; MODEL
Language英语
Funding ProjectNational Natural Science Foundation of China[41574147] ; National Natural Science Foundation of China[41904142] ; National Natural Science Foundation of China[41822403] ; National Natural Science Foundation of China[41774165] ; National Natural Science Foundation of China[41621063] ; National Natural Science Foundation of China[41774161] ; National Natural Science Foundation of China[41604135] ; China Postdoctoral Science Foundation[1231811] ; Youth Innovation Promotion Association CAS ; Key Laboratory of Space Weather
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Key Laboratory of Space Weather ; Key Laboratory of Space Weather ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Key Laboratory of Space Weather ; Key Laboratory of Space Weather ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Key Laboratory of Space Weather ; Key Laboratory of Space Weather ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Key Laboratory of Space Weather ; Key Laboratory of Space Weather
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000496692700001
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95739
Collection地球与行星物理院重点实验室
Corresponding AuthorYu, Tao
Affiliation1.China Univ Geosci, Inst Geophys & Geomat, Hubei Subsurface Multiscale Imaging Key Lab, Wuhan, Hubei, Peoples R China
2.China Meteorol Adm, Key Lab Space Weather, Natl Ctr Space Weather, Beijing, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
4.Chinese Acad Sci, Inst Earth Sci, Beijing, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, Beijing Natl Observ Space Environm, Beijing, Peoples R China
6.Univ Chinese Acad Sci, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Yang, Na,Yu, Tao,Le, Huijun,et al. The High-Latitude Trough in the Southern Hemisphere Observed by Swarm-A Satellite[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2019:11.
APA Yang, Na.,Yu, Tao.,Le, Huijun.,Liu, Libo.,Sun, Yang-Yi.,...&Wang, Jin.(2019).The High-Latitude Trough in the Southern Hemisphere Observed by Swarm-A Satellite.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,11.
MLA Yang, Na,et al."The High-Latitude Trough in the Southern Hemisphere Observed by Swarm-A Satellite".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS (2019):11.
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