{"@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/1362544418658209152.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1002/jgra.50386"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjgra.50386"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/jgra.50386"}}],"dc:title":[{"@value":"Contribution of wind, conductivity, and geomagnetic main field to the variation in the geomagnetic <i>Sq</i> field"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title><jats:p>Long‐term variation in the geomagnetic <jats:italic>Sq</jats:italic> field and the cause of the variation were examined. The amplitude of the geomagnetic Y component (<jats:italic>Sq</jats:italic>(Y)) in equinox was averaged for each year and adopted as a proxy of the <jats:italic>Sq</jats:italic> field. <jats:italic>Sq</jats:italic>(Y) was combined with the ionospheric conductivity estimated by the International Reference Ionosphere model to determine the dynamo electric field and neutral wind velocity by using the geomagnetic main field strength. It was found that the solar activity dependence of the <jats:italic>Sq</jats:italic> field could be almost completely attributed to the conductivity variation, and neutral winds tend to decrease when the solar activity increases. Although the long‐term variation in the dynamo field differed among observatories, these differences were mostly attributed to the locality of the geomagnetic secular variation, whereas the variations in neutral wind amplitude were nearly the same in all regions. On the other hand, no clear long‐term variation in neutral wind was detected other than that by solar activity.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1382544418658209152","@type":"Researcher","foaf:name":[{"@value":"Masahiko Takeda"}],"jpcoar:affiliationName":[{"@value":"Data Analysis Center for Geomagnetism and Space Magnetism, Faculty of Science Kyoto University  Kyoto Japan"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"21699380"},{"@type":"EISSN","@value":"21699402"}],"prism:publicationName":[{"@value":"Journal of Geophysical Research: Space Physics"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2013-07","prism:volume":"118","prism:number":"7","prism:startingPage":"4516","prism:endingPage":"4522"},"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/10.1002%2Fjgra.50386"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/jgra.50386"}],"createdAt":"2013-06-10","modifiedAt":"2023-09-24","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050001335802470528","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Long-term variation in the upper atmosphere as seen in the geomagnetic solar quiet daily variation"}]},{"@id":"https://cir.nii.ac.jp/crid/1360004229808235392","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Characteristics of Seasonal Variation and Solar Activity Dependence of the Geomagnetic Solar Quiet Daily Variation"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285704784920576","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Effect of intrinsic magnetic field decrease on the low‐ to middle‐latitude upper atmosphere dynamics simulated by GAIA"}]},{"@id":"https://cir.nii.ac.jp/crid/1360298754825669376","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Empirical Modeling of Ionospheric Current Using Empirical Orthogonal Function Analysis and Artificial Neural Network"}]},{"@id":"https://cir.nii.ac.jp/crid/1360848654736414976","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Quasi‐biennial oscillation of the ionospheric wind dynamo"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1002/jgra.50386"},{"@type":"OPENAIRE","@value":"doi_dedup___::c1dd25e9c49f332e3e0be2103d6e7b9b"},{"@type":"CROSSREF","@value":"10.1002/2017ja024342_references_DOI_ROt5obkELAOZau0CAI5RNFyD1Xd"},{"@type":"CROSSREF","@value":"10.1186/s40623-014-0155-1_references_DOI_ROt5obkELAOZau0CAI5RNFyD1Xd"},{"@type":"CROSSREF","@value":"10.1002/2017ja024278_references_DOI_ROt5obkELAOZau0CAI5RNFyD1Xd"},{"@type":"CROSSREF","@value":"10.1029/2021sw002831_references_DOI_ROt5obkELAOZau0CAI5RNFyD1Xd"},{"@type":"CROSSREF","@value":"10.1002/2016ja023684_references_DOI_ROt5obkELAOZau0CAI5RNFyD1Xd"}]}