{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1363670319521465472.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1029/2010ja015339"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2010JA015339"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2010JA015339"}},{"identifier":{"@type":"NAID","@value":"20000803759"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Reexamination of the <i>S</i><sub><i>q</i></sub>‐EEJ relationship based on extended magnetometer networks in the east Asian region"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>We reexamined the daily <jats:italic>S</jats:italic><jats:sub><jats:italic>q</jats:italic></jats:sub>‐equatorial electrojet (EEJ) relationship based on these extended magnetometer networks in the east Asian region: (1) the Circum‐pan Pacific Magnetometer Network (CPMN), (2) the International Real‐time Magnetic Observatory Network (INTERMAGNET), and (3) the World Data Center for Geomagnetism, Kyoto (WDC). Daily variations of the geomagnetic field for geomagnetically quiet days (Kp ≤ 2+) from 1996 to 2005 were analyzed. Noontime eastward <jats:italic>S</jats:italic><jats:sub><jats:italic>q</jats:italic></jats:sub> current intensities were estimated by latitudinally integrating the north‐south component of the <jats:italic>S</jats:italic><jats:sub><jats:italic>q</jats:italic></jats:sub> field. The corresponding EEJ intensities were estimated from the daily geomagnetic field variations observed at Davao station (dip latitude of −0.84°deg). We discovered that these intensities of daily <jats:italic>S</jats:italic><jats:sub><jats:italic>q</jats:italic></jats:sub> and EEJ are well correlated on a long‐term basis (<jats:italic>r</jats:italic> = 0.80). The dependences on the solar activity (as indicated by <jats:italic>F</jats:italic>10.7) and season (the day number) of <jats:italic>S</jats:italic><jats:sub><jats:italic>q</jats:italic></jats:sub> and EEJ variations were examined. It was demonstrated that both daily <jats:italic>S</jats:italic><jats:sub><jats:italic>q</jats:italic></jats:sub> and EEJ intensities are correlated to <jats:italic>F</jats:italic>10.7 with similar sensitivities. <jats:italic>F</jats:italic>10.7 is known to show similar variations with solar EUV radiation which causes ionization and heating of the ionosphere. For seasonal dependence, both daily <jats:italic>S</jats:italic><jats:sub><jats:italic>q</jats:italic></jats:sub> and EEJ intensities show predominant semiannual variations with similar spring‐fall asymmetry. The effect of seasonal changes of the EUV flux into the low‐latitude ionosphere is considered. Our results indicate that the daily values of <jats:italic>S</jats:italic><jats:sub><jats:italic>q</jats:italic></jats:sub> and EEJ react, in the same manner, to temporal changes of solar ionization and heating of the ionosphere.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1584231876079638784","@type":"Researcher","foaf:name":[{"@value":"Y. Yamazaki"}],"jpcoar:affiliationName":[{"@value":"Department of Earth and Planetary Sciences Kyushu University  Fukuoka Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670319521465478","@type":"Researcher","foaf:name":[{"@value":"K. Yumoto"}],"jpcoar:affiliationName":[{"@value":"Department of Earth and Planetary Sciences Kyushu University  Fukuoka Japan"},{"@value":"Space Environment Research Center Kyushu University  Fukuoka Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670319521465475","@type":"Researcher","foaf:name":[{"@value":"T. Uozumi"}],"jpcoar:affiliationName":[{"@value":"Space Environment Research Center Kyushu University  Fukuoka Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670319521465477","@type":"Researcher","foaf:name":[{"@value":"S. Abe"}],"jpcoar:affiliationName":[{"@value":"Space Environment Research Center Kyushu University  Fukuoka Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670319521465474","@type":"Researcher","foaf:name":[{"@value":"M. G. Cardinal"}],"jpcoar:affiliationName":[{"@value":"Department of Earth and Planetary Sciences Kyushu University  Fukuoka Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670319521465473","@type":"Researcher","foaf:name":[{"@value":"D. McNamara"}],"jpcoar:affiliationName":[{"@value":"Manila Observatory  Manila Philippines"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670319521465479","@type":"Researcher","foaf:name":[{"@value":"R. Marshall"}],"jpcoar:affiliationName":[{"@value":"IPS Radio and Space Services Bureau of Meteorology  Haymarket, New South Wales Australia"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670319521465472","@type":"Researcher","foaf:name":[{"@value":"B. M. Shevtsov"}],"jpcoar:affiliationName":[{"@value":"Institute of Cosmophysical Research and Radio Wave Propagation Far Eastern Branch of the Russian Academy of Sciences  Paratunka Russia"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670319521465480","@type":"Researcher","foaf:name":[{"@value":"S. I. Solovyev"}],"jpcoar:affiliationName":[{"@value":"Institute of Cosmophysical Research and Aeronomy Siberian Branch of the Russian Academy of Sciences  Yakutsk Russia"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"01480227"}],"prism:publicationName":[{"@value":"Journal of Geophysical Research: Space Physics"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2010-09","prism:volume":"115","prism:number":"A9","prism:startingPage":"A09319"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2010JA015339"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2010JA015339"}],"createdAt":"2010-09-23","modifiedAt":"2023-11-02","project":[{"@id":"https://cir.nii.ac.jp/crid/1040000782106394496","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"22253007"},{"@type":"JGN","@value":"JP22253007"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22253007/"}],"notation":[{"@language":"ja","@value":"大規模電離圏電流の観測に基づく太陽圏ー磁気圏ー電離圏ー大気圏結合過程の研究"},{"@language":"en","@value":"Study on the Couplings of Heliosphere-Magnetosphere-Ionosphere-Atmosphere by Global Sq Current Observation"}]}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360002216708930048","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"An empirical model of the quiet daily geomagnetic field variation"}]},{"@id":"https://cir.nii.ac.jp/crid/1360565167939536640","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Longitudinal and solar activity dependence of equatorial electrojet at Southeast Asian sector"}]},{"@id":"https://cir.nii.ac.jp/crid/1360584339765080448","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Ionospheric Current Variations by Empirical Orthogonal Function Analysis: Solar Activity Dependence and Longitudinal Differences"}]},{"@id":"https://cir.nii.ac.jp/crid/1523669554869873152","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@value":"Seasonal evolution of Sq current system at sub-auroral latitude"}]},{"@id":"https://cir.nii.ac.jp/crid/2050870367075042944","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Dipolar elementary current systems for ionospheric current reconstruction at low and middle latitudes"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1029/2010ja015339"},{"@type":"CIA","@value":"20000803759"},{"@type":"KAKEN","@value":"PRODUCT-13242918"},{"@type":"OPENAIRE","@value":"doi_dedup___::991ca9c4c11e882d87675cc38cf73d8a"},{"@type":"CROSSREF","@value":"10.1029/2011ja016487_references_DOI_VUCdTga6OWSq3ScolHoLkrYwuA9"},{"@type":"CROSSREF","@value":"10.1186/s40623-020-01284-1_references_DOI_VUCdTga6OWSq3ScolHoLkrYwuA9"},{"@type":"CROSSREF","@value":"10.1029/2021ja029903_references_DOI_6TJoZSMuTK28SEJzA2j0cQcnuNv"},{"@type":"CROSSREF","@value":"10.1109/iconspace.2015.7283763_references_DOI_VUCdTga6OWSq3ScolHoLkrYwuA9"}]}