Lower thermospheric-enhanced sodium layers observed at low latitude and possible formation: Case studies

doi:10.1002/jgra.50200

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	Lower thermospheric-enhanced sodium layers observed at low latitude and possible formation: Case studies
	Xue, X. H.1,7; Dou, X. K.2,7; Lei, J.1,7; Chen, J. S.2,3,4; Ding, Z. H.4; Li, T.1,7; Gao, Q.1,7; Tang, W. W.1,7; Cheng, X. W.6; Wei, K.5
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2013-05-01
卷号	118 期号:5 页码:2409-2418
关键词	thermospheric sodium layer sporadic sodium layer sporadic E
ISSN号	2169-9380
DOI	10.1002/jgra.50200
英文摘要	We report two lower thermospheric-enhanced sodium layer (TeSL) cases observed at a low-latitude station, Lijiang, China (26.7 degrees N, 100.0 degrees E), on 10 March and 10 April 2012, respectively. The TeSLs in the two cases were located at altitudes near 122 and 112km, respectively. In addition, strong sporadic sodium layers (SSLs) near 100km accompanied the TeSL observed on 10 March 2012. Both the TeSLs and SSLs exhibited tidal-induced downward motion. The adjacent ground-based and space-borne ionospheric radio observations showed strong E-s layers before the appearance of the TeSLs, suggesting an E-s- TeSLs (SSLs) chain formed through the tidal wind shear mechanism. Assuming that the vertical tidal wavelengths remain unchanged, it is found that in different regions caused by the tidal wind shear, different TeSLs evolution processes are expected: (1) in a tidal-convergence region, a TeSL/SSL with a downward propagation phase is enhanced due to a rapid decrease in the Na(+)lifetime at the lower altitude; (2) in an ion convergence-divergence interface region, a TeSL/SSL will still follow the tidal downward phase progression, but sodium density does not exhibit evident enhancement; and (3) when a TeSL/SSL enters into a tidal wind-divergence zone, the layer density tends to decrease.
资助项目	Chinese Academy of Sciences[KJCX2-EW-J01] ; Chinese Academy of Sciences[KZZD-EW-0101] ; Chinese Academy of Sciences[KZCX2-EW-QN509] ; National Natural Science Foundation of China[41174132] ; National Natural Science Foundation of China[41121003] ; National Natural Science Foundation of China[41025016] ; foundation for the author of National Excellent Doctoral Dissertation of PR China[201025] ; Specialized Research Fund for State Key Laboratories
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000325215800050
内容类型	期刊论文
源URL	[http://202.127.146.157/handle/2RYDP1HH/3828]
专题	中国科学院武汉植物园
通讯作者	Dou, X. K.
作者单位	1.Univ Sci & Technol China, Sch Earth & Space Sci, Mengcheng Natl Geophys Observ, Hefei 230026, Anhui, Peoples R China 2.Chinese Acad Sci, State Key Lab Space Weather, Beijing, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing, Peoples R China 4.China Res Inst Radiowave Propagat, Natl Key Lab Electromagnet Environm, Qingdao, Peoples R China 5.Chinese Acad Sci, Inst Opt & Elect, Chengdu, Peoples R China 6.Chinese Acad Sci, Wuhan Inst Phys & Math, Wuhan, Peoples R China 7.Univ Sci & Technol China, Dept Geophys & Planetary Sci, CAS Key Lab Geospace Environm, Hefei 230026, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Xue, X. H.,Dou, X. K.,Lei, J.,et al. Lower thermospheric-enhanced sodium layers observed at low latitude and possible formation: Case studies[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2013,118(5):2409-2418.
APA	Xue, X. H..,Dou, X. K..,Lei, J..,Chen, J. S..,Ding, Z. H..,...&Wei, K..(2013).Lower thermospheric-enhanced sodium layers observed at low latitude and possible formation: Case studies.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,118(5),2409-2418.
MLA	Xue, X. H.,et al."Lower thermospheric-enhanced sodium layers observed at low latitude and possible formation: Case studies".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 118.5(2013):2409-2418.