IGGCAS OpenIR  > 地球与行星物理院重点实验室
Interhemispheric conjugate effect in longitude variations of mid-latitude ion density
Chen, Yiding1,2,3,4; Liu, Libo1,2,3,4; Le, Huijun1,2,3,4; Zhang, Hui1,2,3,4
2019-11-06
Source PublicationJOURNAL OF SPACE WEATHER AND SPACE CLIMATE
ISSN2115-7251
Volume9Pages:10
AbstractEarlier incoherent scatter radar measurements revealed upward topside ion fluxes in the summer and downward fluxes in the winter at mid-latitudes at night; a summer to winter interhemispheric coupling was accordingly inferred. However, this interhemispheric coupling through the plasmasphere is difficult to confirm directly from observations. A possible result induced by this coupling is interhemispheric conjugacy of the mid-latitude ionosphere. In this paper, interhemispheric conjugate effect in longitude variations of mid-latitude total ion density (N-i) is presented, for the first time, using the Defense Meteorological Satellite Program (DMSP) measurements; northern and southern N-i longitude variations at 21:30 LT are similar between magnetically conjugate mid-latitudes around solar minimum June Solstice of 1996. The conjugate effect after sunset also occurs around the June Solstice in other solar minimum years but disappears when solar activity increases. We suggested that mid-latitude interhemispheric coupling is responsible for the conjugate effect. Neutral wind induced ionospheric transport causes topside longitude variations via upward diffusion at summer mid-latitudes; this further induces similar longitude variations of topside N-i at winter mid-latitudes via the summer to winter interhemispheric coupling. The conjugate effect occurs only inside the plasmapause where magnetic flux tubes are closed and the plasma in these tubes can stably corotate with the Earth. The conjugate effect not only proves mid-latitude interhemispheric coupling through the plasmasphere, but also implies that neutral wind induced transport can affect ionospheric coupling to the plasmasphere at mid-latitudes.
Keywordmid-latitude ionosphere topside ionosphere ion density longitude variation interhemispheric conjugate effect
DOI10.1051/swsc/2019039
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS
WOS KeywordF-REGION ; NIGHTTIME ; IONOSPHERE ; NWA ; ENHANCEMENT ; EQUATORIAL ; IONIZATION ; MORPHOLOGY ; LATITUDES ; TRANSPORT
Language英语
Funding ProjectNational Natural Science Foundation of China[41621063] ; National Natural Science Foundation of China[41674159] ; Youth Innovation Promotion Association, CAS[2016066]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS ; Youth Innovation Promotion Association, CAS
WOS Research AreaAstronomy & Astrophysics ; Geochemistry & Geophysics ; Meteorology & Atmospheric Sciences
WOS SubjectAstronomy & Astrophysics ; Geochemistry & Geophysics ; Meteorology & Atmospheric Sciences
WOS IDWOS:000497456600001
PublisherEDP SCIENCES S A
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95742
Collection地球与行星物理院重点实验室
Corresponding AuthorChen, Yiding
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Beijing Natl Observ Space Environm, Beijing 100029, Peoples R China
4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100029, Peoples R China
First Author AffilicationInstitute of Geology and Geophysics, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Geology and Geophysics, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Chen, Yiding,Liu, Libo,Le, Huijun,et al. Interhemispheric conjugate effect in longitude variations of mid-latitude ion density[J]. JOURNAL OF SPACE WEATHER AND SPACE CLIMATE,2019,9:10.
APA Chen, Yiding,Liu, Libo,Le, Huijun,&Zhang, Hui.(2019).Interhemispheric conjugate effect in longitude variations of mid-latitude ion density.JOURNAL OF SPACE WEATHER AND SPACE CLIMATE,9,10.
MLA Chen, Yiding,et al."Interhemispheric conjugate effect in longitude variations of mid-latitude ion density".JOURNAL OF SPACE WEATHER AND SPACE CLIMATE 9(2019):10.
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