IGGCAS OpenIR  > 地球与行星物理院重点实验室
Equinoctial Asymmetry in Solar Quiet Fields along the 120 degrees E Meridian Chain
Wu, Yingyan1; Liu, Libo2,3,4; Ren, Zhipeng2,4,5
2021-10-01
Source PublicationAPPLIED SCIENCES-BASEL
Volume11Issue:19Pages:13
AbstractEquinoctial asymmetry of the range of the solar quiet day variation (Sq) of the horizontal geomagnetic field (H) has been found in some low latitude geomagnetic observatories. This study conducted an investigation of its latitude distribution and the relationship with the solar cycle by using the H field measurements from six observatories along the 120 degrees E meridian chain in the years 1957-2013. Results illustrate a significant equinoctial asymmetry of the SqH range at all observatories. Three main features were identified. First, the signature of the equinoctial asymmetry of the SqH range is opposite for observatories located at the northern and southern sides of the Northern Hemisphere Sq current focus. It shows larger values around spring than autumn equinox at southern observatories, and the converse is seen at northern observatories. Second, the asymmetry increases with the distance from the Sq current focus, suggesting the stronger sensitivity of the distant observatories than observatories around the focus. The result of linear fitting presents a positive dependence of the asymmetry coefficient on geographic latitude, with a reversal of the asymmetry occurring at 28.1 degrees N near the focus of the average Sq current. Third, there is no obvious dependence of the equinoctial asymmetry of the SqH range on solar activity, suggesting a possible cause from some regional factors related to the ionospheric dynamo process.
Keywordsolar quiet variation equinoctial asymmetry latitudinal distribution
DOI10.3390/app11199150
Funding OrganizationNational Key R&D Program of China ; National Key R&D Program of China ; IEF Grant of CEA ; IEF Grant of CEA ; APSCO Earthquake Research Project Phase II ; APSCO Earthquake Research Project Phase II ; ISSI-BJ project: Integrating Satellite and Ground Observations for Earthquake Signatures and Precursors ; ISSI-BJ project: Integrating Satellite and Ground Observations for Earthquake Signatures and Precursors ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Research Project of Large Research Infrastructures of CAS-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Open Research Project of Large Research Infrastructures of CAS-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Meridian Project of China ; Meridian Project of China ; National Key R&D Program of China ; National Key R&D Program of China ; IEF Grant of CEA ; IEF Grant of CEA ; APSCO Earthquake Research Project Phase II ; APSCO Earthquake Research Project Phase II ; ISSI-BJ project: Integrating Satellite and Ground Observations for Earthquake Signatures and Precursors ; ISSI-BJ project: Integrating Satellite and Ground Observations for Earthquake Signatures and Precursors ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Research Project of Large Research Infrastructures of CAS-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Open Research Project of Large Research Infrastructures of CAS-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Meridian Project of China ; Meridian Project of China ; National Key R&D Program of China ; National Key R&D Program of China ; IEF Grant of CEA ; IEF Grant of CEA ; APSCO Earthquake Research Project Phase II ; APSCO Earthquake Research Project Phase II ; ISSI-BJ project: Integrating Satellite and Ground Observations for Earthquake Signatures and Precursors ; ISSI-BJ project: Integrating Satellite and Ground Observations for Earthquake Signatures and Precursors ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Research Project of Large Research Infrastructures of CAS-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Open Research Project of Large Research Infrastructures of CAS-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Meridian Project of China ; Meridian Project of China ; National Key R&D Program of China ; National Key R&D Program of China ; IEF Grant of CEA ; IEF Grant of CEA ; APSCO Earthquake Research Project Phase II ; APSCO Earthquake Research Project Phase II ; ISSI-BJ project: Integrating Satellite and Ground Observations for Earthquake Signatures and Precursors ; ISSI-BJ project: Integrating Satellite and Ground Observations for Earthquake Signatures and Precursors ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Research Project of Large Research Infrastructures of CAS-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Open Research Project of Large Research Infrastructures of CAS-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Meridian Project of China ; Meridian Project of China
WOS KeywordSQ FOCUS POSITION ; GEOMAGNETIC-VARIATION ; VARIABILITY ; IONOSPHERE ; LATITUDE ; THERMOSPHERE ; CONDUCTIVITY ; MOVEMENT ; BEHAVIOR ; DYNAMO
Language英语
Funding ProjectNational Key R&D Program of China[2018YFC1503504-03] ; IEF Grant of CEA[2021IEF0709] ; APSCO Earthquake Research Project Phase II ; ISSI-BJ project: Integrating Satellite and Ground Observations for Earthquake Signatures and Precursors ; National Natural Science Foundation of China[41774161] ; Open Research Project of Large Research Infrastructures of CAS-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Meridian Project of China
Funding OrganizationNational Key R&D Program of China ; National Key R&D Program of China ; IEF Grant of CEA ; IEF Grant of CEA ; APSCO Earthquake Research Project Phase II ; APSCO Earthquake Research Project Phase II ; ISSI-BJ project: Integrating Satellite and Ground Observations for Earthquake Signatures and Precursors ; ISSI-BJ project: Integrating Satellite and Ground Observations for Earthquake Signatures and Precursors ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Research Project of Large Research Infrastructures of CAS-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Open Research Project of Large Research Infrastructures of CAS-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Meridian Project of China ; Meridian Project of China ; National Key R&D Program of China ; National Key R&D Program of China ; IEF Grant of CEA ; IEF Grant of CEA ; APSCO Earthquake Research Project Phase II ; APSCO Earthquake Research Project Phase II ; ISSI-BJ project: Integrating Satellite and Ground Observations for Earthquake Signatures and Precursors ; ISSI-BJ project: Integrating Satellite and Ground Observations for Earthquake Signatures and Precursors ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Research Project of Large Research Infrastructures of CAS-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Open Research Project of Large Research Infrastructures of CAS-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Meridian Project of China ; Meridian Project of China ; National Key R&D Program of China ; National Key R&D Program of China ; IEF Grant of CEA ; IEF Grant of CEA ; APSCO Earthquake Research Project Phase II ; APSCO Earthquake Research Project Phase II ; ISSI-BJ project: Integrating Satellite and Ground Observations for Earthquake Signatures and Precursors ; ISSI-BJ project: Integrating Satellite and Ground Observations for Earthquake Signatures and Precursors ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Research Project of Large Research Infrastructures of CAS-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Open Research Project of Large Research Infrastructures of CAS-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Meridian Project of China ; Meridian Project of China ; National Key R&D Program of China ; National Key R&D Program of China ; IEF Grant of CEA ; IEF Grant of CEA ; APSCO Earthquake Research Project Phase II ; APSCO Earthquake Research Project Phase II ; ISSI-BJ project: Integrating Satellite and Ground Observations for Earthquake Signatures and Precursors ; ISSI-BJ project: Integrating Satellite and Ground Observations for Earthquake Signatures and Precursors ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Research Project of Large Research Infrastructures of CAS-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Open Research Project of Large Research Infrastructures of CAS-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Meridian Project of China ; Meridian Project of China
WOS Research AreaChemistry ; Engineering ; Materials Science ; Physics
WOS SubjectChemistry, Multidisciplinary ; Engineering, Multidisciplinary ; Materials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000778211900060
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/105091
Collection地球与行星物理院重点实验室
Corresponding AuthorWu, Yingyan
Affiliation1.China Earthquake Adm, Inst Earthquake Forecasting, Beijing 100036, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Heilongjiang Mohe Geophys Observ, Beijing 100029, Peoples R China
4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, Beijing Natl Observ Space Environm, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Wu, Yingyan,Liu, Libo,Ren, Zhipeng. Equinoctial Asymmetry in Solar Quiet Fields along the 120 degrees E Meridian Chain[J]. APPLIED SCIENCES-BASEL,2021,11(19):13.
APA Wu, Yingyan,Liu, Libo,&Ren, Zhipeng.(2021).Equinoctial Asymmetry in Solar Quiet Fields along the 120 degrees E Meridian Chain.APPLIED SCIENCES-BASEL,11(19),13.
MLA Wu, Yingyan,et al."Equinoctial Asymmetry in Solar Quiet Fields along the 120 degrees E Meridian Chain".APPLIED SCIENCES-BASEL 11.19(2021):13.
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