{"@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/1360004229804063104.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1002/2015ja021309"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F2015JA021309"}},{"identifier":{"@type":"URI","@value":"https://onlinelibrary.wiley.com/doi/pdf/10.1002/2015JA021309"}},{"identifier":{"@type":"URI","@value":"https://onlinelibrary.wiley.com/doi/full-xml/10.1002/2015JA021309"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2015JA021309"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Response of ionospheric electric fields at mid‐low latitudes during sudden commencements"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title><jats:p>Using in situ observations from the Republic of China Satellite‐1 spacecraft, we investigated the time response and local time dependence of the ionospheric electric field at mid‐low latitudes associated with geomagnetic sudden commencements (SCs) that occurred from 1999 to 2004. We found that the ionospheric electric field variation associated with SCs instantaneously responds to the preliminary impulse (PI) signature on the ground regardless of spacecraft local time. Our statistical analysis also supports the global instant transmission of electric field from the polar region. In contrast, the peak time detected in the ionospheric electric field is earlier than that of the equatorial geomagnetic field (~20 s before in the PI phase). Based on the ground‐ionosphere waveguide model, this time lag can be attributed to the latitudinal difference of ionospheric conductivity. However, the local time distribution of the initial excursion of ionospheric electric field shows that dusk‐to‐dawn ionospheric electric fields develop during the PI phase. Moreover, the westward electric field in the ionosphere, which produces the preliminary reverse impulse of the geomagnetic field on the dayside feature, appears at 18–22 h LT where the ionospheric conductivity beyond the duskside terminator (18 h LT) is lower than on the dayside. The result of a magnetohydrodynamic simulation for an ideal SC shows that the electric potential distribution is asymmetric with respect to the noon‐midnight meridian. This produces the local time distribution of ionospheric electric fields similar to the observed result, which can be explained by the divergence of the Hall current under nonuniform ionospheric conductivity.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380004229804063106","@type":"Researcher","foaf:name":[{"@value":"N. Takahashi"}],"jpcoar:affiliationName":[{"@value":"Department of Geophysics Tohoku University  Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229804062979","@type":"Researcher","foaf:name":[{"@value":"Y. Kasaba"}],"jpcoar:affiliationName":[{"@value":"Department of Geophysics Tohoku University  Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229804063104","@type":"Researcher","foaf:name":[{"@value":"A. Shinbori"}],"jpcoar:affiliationName":[{"@value":"Research Institute for Sustainable Humanosphere Kyoto University  Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229804063107","@type":"Researcher","foaf:name":[{"@value":"Y. Nishimura"}],"jpcoar:affiliationName":[{"@value":"University of California  Los Angeles California USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229804063105","@type":"Researcher","foaf:name":[{"@value":"T. Kikuchi"}],"jpcoar:affiliationName":[{"@value":"Research Institute for Sustainable Humanosphere Kyoto University  Japan"},{"@value":"Solar‐Terrestrial Environment Laboratory Nagoya University  Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229804062978","@type":"Researcher","foaf:name":[{"@value":"Y. Ebihara"}],"jpcoar:affiliationName":[{"@value":"Research Institute for Sustainable Humanosphere Kyoto University  Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229804062976","@type":"Researcher","foaf:name":[{"@value":"T. Nagatsuma"}],"jpcoar:affiliationName":[{"@value":"National Institute of Information and Communications Technology  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":"2015-06","prism:volume":"120","prism:number":"6","prism:startingPage":"4849","prism:endingPage":"4862"},"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%2F2015JA021309"},{"@id":"https://onlinelibrary.wiley.com/doi/pdf/10.1002/2015JA021309"},{"@id":"https://onlinelibrary.wiley.com/doi/full-xml/10.1002/2015JA021309"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2015JA021309"}],"createdAt":"2015-06-04","modifiedAt":"2023-09-10","project":[{"@id":"https://cir.nii.ac.jp/crid/1040000782297899520","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"26400478"},{"@type":"JGN","@value":"JP26400478"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-26400478/"}],"notation":[{"@language":"ja","@value":"地磁気擾乱時における電離圏電場分布の変動と電離圏擾乱ダイナモとの関係"},{"@language":"en","@value":"Temporal and spatial variations of ionospheric electric fields during geomagnetic storms and the relation to ionospheric disturbance dynamo"}]}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050282810790175104","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Counter equatorial electrojet and overshielding after substorm onset: Global MHD simulation study"},{"@value":"Counter electrojet and overshielding after substorm onset: Global MHD simulation study"}]},{"@id":"https://cir.nii.ac.jp/crid/1050291037075022080","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Impact of substorm time O⁺ outflow on ring current enhancement"},{"@value":"Impact of substorm time O<sup>+</sup> outflow on ring current enhancement"}]},{"@id":"https://cir.nii.ac.jp/crid/1360002216708294272","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Direct measurements of the Poynting flux associated with convection electric fields in the magnetosphere"}]},{"@id":"https://cir.nii.ac.jp/crid/1360011142935405568","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Generation mechanisms for magnetosphere‐ionosphere current systems deduced from a three‐dimensional MHD simulation of the solar wind‐magnetosphere‐ionosphere coupling processes"}]},{"@id":"https://cir.nii.ac.jp/crid/1360011143589078016","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Night-time sudden commencements observed by CHAMP and ground-based magnetometers and their relationship to solar wind parameters"}]},{"@id":"https://cir.nii.ac.jp/crid/1360011144346243072","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"A numerical simulation of the geomagnetic sudden commencement: 2. 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