{"@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/1361699995913504256.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1002/2013ja019691"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F2013JA019691"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2013JA019691"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/full-xml/10.1002/2013JA019691"}}],"dc:title":[{"@value":"Pi2 pulsations observed around the dawn terminator"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title>\n                  <jats:p>\n                    We examined Pi2 pulsations observed simultaneously at low‐latitude stations (\n                    <jats:italic>L</jats:italic>\n                    = 1.15 − 2.33) around the dawn terminator. Those Pi2 pulsations observed in the sunlit region were polarized in the azimuthal (\n                    <jats:italic>D</jats:italic>\n                    , positive eastward) direction. We found that the\n                    <jats:italic>D</jats:italic>\n                    component oscillations in the dark and sunlit regions were in antiphase, whereas the\n                    <jats:italic>H</jats:italic>\n                    component oscillated in phase. A statistical analysis indicates that these\n                    <jats:italic>D</jats:italic>\n                    component phase reversals occurred about 0.5 h sunward of the dawn terminator at 100 km in altitude, corresponding to the highly conducting\n                    <jats:italic>E</jats:italic>\n                    layer. The azimuthal polarization and\n                    <jats:italic>D</jats:italic>\n                    component phase reversals related to the dawn terminator cannot be explained by the existing models of low‐latitude Pi2s (e.g., cavity resonance or substorm current wedge oscillations). Similar\n                    <jats:italic>D</jats:italic>\n                    component phase reversals were also found on the dusk side although the amplitude of the\n                    <jats:italic>D</jats:italic>\n                    component is smaller than that of the\n                    <jats:italic>H</jats:italic>\n                    component. We suggest that the meridional ionospheric current in the sunlit region adjacent to the dawn terminator drives the\n                    <jats:italic>D</jats:italic>\n                    component oscillations in antiphase with those\n                    <jats:italic>D</jats:italic>\n                    oscillations produced by the oscillatory field‐aligned current (FAC) on the postmidnight side. The meridional current is expected to form a part of a current system that extends from the postmidnight FAC to the equatorial Cowling current. The\n                    <jats:italic>D</jats:italic>\n                    component oscillations in the Northern and Southern Hemispheres are also in antiphase, indicating that the current system is symmetric with respect to the equator.\n                  </jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380848661782595078","@type":"Researcher","foaf:name":[{"@value":"S. Imajo"}],"jpcoar:affiliationName":[{"@value":"Department of Earth and Planetary Science Kyushu University  Fukuoka Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699995913504256","@type":"Researcher","foaf:name":[{"@value":"A. Yoshikawa"}],"jpcoar:affiliationName":[{"@value":"Department of Earth and Planetary Science Kyushu University  Fukuoka Japan"},{"@value":"International Center for Space Weather Science and Education Kyushu University  Fukuoka Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699995913504258","@type":"Researcher","foaf:name":[{"@value":"T. Uozumi"}],"jpcoar:affiliationName":[{"@value":"International Center for Space Weather Science and Education Kyushu University  Fukuoka Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699995913504261","@type":"Researcher","foaf:name":[{"@value":"S. Ohtani"}],"jpcoar:affiliationName":[{"@value":"Johns Hopkins University Applied Physics Laboratory  Laurel Maryland USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699995913504263","@type":"Researcher","foaf:name":[{"@value":"A. Nakamizo"}],"jpcoar:affiliationName":[{"@value":"Corporate Planning Department National Institute of Information and Communications Technology  Tokyo Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699995913504265","@type":"Researcher","foaf:name":[{"@value":"R. Marshall"}],"jpcoar:affiliationName":[{"@value":"IPS Radio and Space Services Bureau of Meteorology  Sydney New South Wales Australia"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699995913504259","@type":"Researcher","foaf:name":[{"@value":"B. M. Shevtsov"}],"jpcoar:affiliationName":[{"@value":"Institute of Cosmophysical Researches and Radio Wave Propagation  Paratunka Russia"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699995913504257","@type":"Researcher","foaf:name":[{"@value":"V. A. Akulichev"}],"jpcoar:affiliationName":[{"@value":"Pacific Oceanological Institute FEB RAS  Vladivostok Russia"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699995913504260","@type":"Researcher","foaf:name":[{"@value":"U. Sukhbaatar"}],"jpcoar:affiliationName":[{"@value":"Research Center of Astronomy and Geophysics Mongolian Academy of Sciences  Ulaanbaatar Mongolia"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699995913504262","@type":"Researcher","foaf:name":[{"@value":"A. Liedloff"}],"jpcoar:affiliationName":[{"@value":"CSIRO Land and Water  Darwin Northern Territory Australia"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699995913504264","@type":"Researcher","foaf:name":[{"@value":"K. Yumoto"}],"jpcoar:affiliationName":[{"@value":"Department of Earth and Planetary Science Kyushu University  Fukuoka Japan"},{"@value":"International Center for Space Weather Science and Education Kyushu University  Fukuoka 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":"2015-03","prism:volume":"120","prism:number":"3","prism:startingPage":"2088","prism:endingPage":"2098"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor","http://doi.wiley.com/10.1002/tdm_license_1.1"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F2013JA019691"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2013JA019691"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/full-xml/10.1002/2013JA019691"}],"createdAt":"2015-02-25","modifiedAt":"2026-02-04","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050845763745243648","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Comprehensive Study of Low‐Latitude Pi2 Pulsations Using Observations From Multisatellite Swarm Mission and Global Network of Ground Observatories"}]},{"@id":"https://cir.nii.ac.jp/crid/1360298754832535040","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Instantaneous Achievement of the Hall and Pedersen–Cowling Current Circuits in Northern and Southern Hemispheres During the Geomagnetic Sudden Commencement on 12 May 2021"}]},{"@id":"https://cir.nii.ac.jp/crid/1360848654738328960","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Application of a global magnetospheric‐ionospheric current model for dayside and terminator Pi2 pulsations"}]},{"@id":"https://cir.nii.ac.jp/crid/1360865815505324160","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Mid-Latitude Ground Magnetic and Electric Field Responses Associated with SCW Development During Substorms"}]},{"@id":"https://cir.nii.ac.jp/crid/1361131418080098816","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Formation of a 3‐D Oscillatory Current System Associated With Global High‐Correlation Pi 2 Event: A Case Study"}]},{"@id":"https://cir.nii.ac.jp/crid/2051714791863302528","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Solar terminator effects on middle- to low-latitude Pi2 pulsations"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1002/2013ja019691"},{"@type":"OPENAIRE","@value":"doi_dedup___::c56c2c108e1487ca34c720510d938460"},{"@type":"CROSSREF","@value":"10.3389/fspas.2022.879314_references_DOI_OXJoS5u8gJtx5THfxerhctnEjXY"},{"@type":"CROSSREF","@value":"10.1029/2019ja026988_references_DOI_OXJoS5u8gJtx5THfxerhctnEjXY"},{"@type":"CROSSREF","@value":"10.1002/2017ja024246_references_DOI_OXJoS5u8gJtx5THfxerhctnEjXY"},{"@type":"CROSSREF","@value":"10.1186/s40623-016-0514-1_references_DOI_OXJoS5u8gJtx5THfxerhctnEjXY"},{"@type":"CROSSREF","@value":"10.1007/978-981-97-0142-1_7_references_DOI_OXJoS5u8gJtx5THfxerhctnEjXY"},{"@type":"CROSSREF","@value":"10.1029/2018ja026094_references_DOI_OXJoS5u8gJtx5THfxerhctnEjXY"}]}