{"@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/1361699993533330944.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1029/2001ja900137"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2001JA900137"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2001JA900137"}}],"dc:title":[{"@value":"A numerical simulation of the Pi2 pulsations associated with the substorm current wedge"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>The present paper deals with the transient behavior of MHD perturbations  in the inner magnetosphere induced by an impulsive localized eastward current  (source current) as a model of Pi2 pulsations in the magnetosphere. The  magnetospheric model consists of a dipole magnetic field, plasmasphere, ionosphere  with Pedersen conductivity, and a free outer boundary. The source current is an  impulsive magnetospheric current at the onset of the substorm current wedge and is  distributed around the equatorial plane of <jats:italic>L</jats:italic> = 10 with  ±2 hour longitudinal extent around midnight. The numerical results allow  us to track variation in the expected Pi2 pulsation signals in both local time and <jats:italic>L</jats:italic>. The poloidal‐mode wave exhibits plasmasphere  virtual resonance, resulting in large amplitudes around midnight, weakening toward  dayside. The toroidal‐mode wave is excited as a field line resonance immediately  after the wave front of the poloidal‐mode wave crosses regions where the radial  gradient of <jats:italic>V</jats:italic><jats:sub><jats:italic>A</jats:italic></jats:sub> is steep. The toroidal‐mode wave has largest amplitude at the local time  of the east/west edge of the source current. The duration of this wave is ∼5  min. In the middle plasmasphere where the radial gradient of the <jats:italic>V</jats:italic><jats:sub><jats:italic>A</jats:italic></jats:sub> is smaller, the poloidal‐mode wave tends to predominate over the  toroidal‐mode wave. These numerical results are consistent with satellite  observations, in so far as the day‐night asymmetry of Pi2 pulsations and the  observation of transient toroidal waves.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380567186752820994","@type":"Researcher","foaf:name":[{"@value":"S. Fujita"}],"jpcoar:affiliationName":[{"@value":"Meteorological College  Kashiwa Japan"},{"@value":"Department of Geophysics and Planetary Sciences Kyoto University  Kyoto Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380861292644696450","@type":"Researcher","foaf:name":[{"@value":"H. Nakata"}],"jpcoar:affiliationName":[{"@value":"Solar‐Terrestrial Environment Laboratory Nagoya University  Toyokawa Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380861292644696451","@type":"Researcher","foaf:name":[{"@value":"M. Itonaga"}],"jpcoar:affiliationName":[{"@value":"Faculty of Education, Yamaguchi University  Yamaguchi Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380861292644696449","@type":"Researcher","foaf:name":[{"@value":"A. Yoshikawa"}],"jpcoar:affiliationName":[{"@value":"Department of Geophysics and Planetary Sciences Kyushu University  Fukuoka Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380861292644696448","@type":"Researcher","foaf:name":[{"@value":"T. Mizuta"}],"jpcoar:affiliationName":[{"@value":"Department of Earth and Planetary Science University of Tokyo  Tokyo Japan"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"01480227"}],"prism:publicationName":[{"@value":"Journal of Geophysical Research: Space Physics"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2002-03","prism:volume":"107","prism:number":"A3","prism:startingPage":"1034"},"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%2F2001JA900137"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2001JA900137"}],"createdAt":"2002-10-27","modifiedAt":"2023-10-31","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050845763745243648","@type":"Article","resourceType":"学術雑誌論文(journal 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