{"@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/1360002214349115136.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1002/2014ja020593"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F2014JA020593"}},{"identifier":{"@type":"URI","@value":"https://onlinelibrary.wiley.com/doi/pdf/10.1002/2014JA020593"}},{"identifier":{"@type":"URI","@value":"https://onlinelibrary.wiley.com/doi/full-xml/10.1002/2014JA020593"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/am-pdf/10.1002/2014JA020593"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2014JA020593"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Formation of the oxygen torus in the inner magnetosphere: Van Allen Probes observations"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title><jats:p>We study the formation process of an oxygen torus during the 12–15 November 2012 magnetic storm, using the magnetic field and plasma wave data obtained by Van Allen Probes. We estimate the local plasma mass density (<jats:italic>ρ</jats:italic><jats:sub>L</jats:sub>) and the local electron number density (<jats:italic>n</jats:italic><jats:sub><jats:italic>e</jats:italic>L</jats:sub>) from the resonant frequencies of standing Alfvén waves and the upper hybrid resonance band. The average ion mass (<jats:italic>M</jats:italic>) can be calculated by <jats:italic>M</jats:italic> ∼ <jats:italic>ρ</jats:italic><jats:sub>L</jats:sub>/<jats:italic>n</jats:italic><jats:sub><jats:italic>e</jats:italic>L</jats:sub> under the assumption of quasi‐neutrality of plasma. During the storm recovery phase, both Probe A and Probe B observe the oxygen torus at <jats:italic>L</jats:italic> = 3.0–4.0 and <jats:italic>L</jats:italic> = 3.7–4.5, respectively, on the morning side. The oxygen torus has <jats:italic>M</jats:italic> = 4.5–8 amu and extends around the plasmapause that is identified at <jats:italic>L</jats:italic>∼3.2–3.9. We find that during the initial phase, <jats:italic>M</jats:italic> is 4–7 amu throughout the plasma trough and remains at ∼1 amu in the plasmasphere, implying that ionospheric O<jats:sup>+</jats:sup> ions are supplied into the inner magnetosphere already in the initial phase of the magnetic storm. Numerical calculation under a decrease of the convection electric field reveals that some of thermal O<jats:sup>+</jats:sup> ions distributed throughout the plasma trough are trapped within the expanded plasmasphere, whereas some of them drift around the plasmapause on the dawnside. This creates the oxygen torus spreading near the plasmapause, which is consistent with the Van Allen Probes observations. We conclude that the oxygen torus identified in this study favors the formation scenario of supplying O<jats:sup>+</jats:sup> in the inner magnetosphere during the initial phase and subsequent drift during the recovery phase.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380002214349115264","@type":"Researcher","foaf:name":[{"@value":"M. Nosé"}],"jpcoar:affiliationName":[{"@value":"Data Analysis Center for Geomagnetism and Space Magnetism, Graduate School of Science Kyoto University  Kyoto Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380003442467235842","@type":"Researcher","foaf:name":[{"@value":"S. Oimatsu"}],"jpcoar:affiliationName":[{"@value":"Department of Geophysics, Graduate School of Science Kyoto University  Kyoto Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380003442467235716","@type":"Researcher","foaf:name":[{"@value":"K. Keika"}],"jpcoar:affiliationName":[{"@value":"Solar‐Terrestrial Environment Laboratory Nagoya University  Nagoya Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380003442467235841","@type":"Researcher","foaf:name":[{"@value":"C. A. Kletzing"}],"jpcoar:affiliationName":[{"@value":"Department of Physics and Astronomy University of Iowa  Iowa City Iowa USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1380003442467235714","@type":"Researcher","foaf:name":[{"@value":"W. S. Kurth"}],"jpcoar:affiliationName":[{"@value":"Department of Physics and Astronomy University of Iowa  Iowa City Iowa USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1380003442467235843","@type":"Researcher","foaf:name":[{"@value":"S. De Pascuale"}],"jpcoar:affiliationName":[{"@value":"Department of Physics and Astronomy University of Iowa  Iowa City Iowa USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1380003442467235712","@type":"Researcher","foaf:name":[{"@value":"C. W. Smith"}],"jpcoar:affiliationName":[{"@value":"Institute for Earth, Oceans and Space University of New Hampshire  Durham New Hampshire USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1380003442467235717","@type":"Researcher","foaf:name":[{"@value":"R. J. MacDowall"}],"jpcoar:affiliationName":[{"@value":"Solar System Exploration Division Goddard Space Flight Center  Greenbelt Maryland USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1380003442467235840","@type":"Researcher","foaf:name":[{"@value":"S. Nakano"}],"jpcoar:affiliationName":[{"@value":"Institute of Statistical Mathematics Research Organization of Information and Systems  Tokyo Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380002214349115136","@type":"Researcher","foaf:name":[{"@value":"G. D. Reeves"}],"jpcoar:affiliationName":[{"@value":"Space Sciences and Applications Group Los Alamos National Laboratory  Los Alamos New Mexico USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1380003442467235713","@type":"Researcher","foaf:name":[{"@value":"H. E. Spence"}],"jpcoar:affiliationName":[{"@value":"Institute for Earth, Oceans and Space University of New Hampshire  Durham New Hampshire USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1380003442467235715","@type":"Researcher","foaf:name":[{"@value":"B. A. Larsen"}],"jpcoar:affiliationName":[{"@value":"Space Sciences and Applications Group Los Alamos National Laboratory  Los Alamos New Mexico USA"}]}],"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":"2015-02","prism:volume":"120","prism:number":"2","prism:startingPage":"1182","prism:endingPage":"1196"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#am","http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F2014JA020593"},{"@id":"https://onlinelibrary.wiley.com/doi/pdf/10.1002/2014JA020593"},{"@id":"https://onlinelibrary.wiley.com/doi/full-xml/10.1002/2014JA020593"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/am-pdf/10.1002/2014JA020593"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2014JA020593"}],"createdAt":"2015-01-24","modifiedAt":"2023-09-17","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=Astrophysics%20and%20Astronomy","dc:title":"Astrophysics and Astronomy"}],"project":[{"@id":"https://cir.nii.ac.jp/crid/1040000782243167744","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"25287127"},{"@type":"JGN","@value":"JP25287127"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-25287127/"}],"notation":[{"@language":"ja","@value":"深内部磁気圏における高エネルギーイオン生成・輸送機構とそのイオン種依存性の解明"},{"@language":"en","@value":"Investigation of creation and transport mechanisms of energetic ions in deep inner magnetosphere and their dependence on ion species"}]},{"@id":"https://cir.nii.ac.jp/crid/1040000782316630656","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"26800257"},{"@type":"JGN","@value":"JP26800257"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-26800257/"}],"notation":[{"@language":"ja","@value":"内部磁気圏編隊衛星データを用いたリングカレントイオン加速と消失に関する研究"},{"@language":"en","@value":"Study on the acceleration and loss of ring current ions using multiple spacecraft in the inner magnetosphere"}]},{"@id":"https://cir.nii.ac.jp/crid/1040282257204471680","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"24740334"},{"@type":"JGN","@value":"JP24740334"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-24740334/"}],"notation":[{"@language":"ja","@value":"データ同化による内部磁気圏の動的描像の解析"},{"@language":"en","@value":"Analysis of dynamic properties of the inner magnetosphere using data assimilation"}]}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050282810700348416","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Oxygen torus in the deep inner magnetosphere and its contribution to recurrent process of O[+]-rich ring current formation"},{"@value":"Oxygen torus in the deep inner magnetosphere and its contribution to recurrent process of O<sup>+</sup>-rich ring current formation"}]},{"@id":"https://cir.nii.ac.jp/crid/1050282810719229056","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Wp index: A new substorm index derived from high-resolution geomagnetic field data at low latitude"},{"@value":"Wp index: A new substorm index derived from high‐resolution geomagnetic field data at low latitude"}]},{"@id":"https://cir.nii.ac.jp/crid/1050576282633240832","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"A Statistical Study of the Solar Wind Dependence of Multi-Harmonic Toroidal ULF Waves Observed by the Arase Satellite"},{"@value":"A Statistical Study of the Solar Wind Dependence of Multi‐Harmonic Toroidal ULF Waves Observed by the Arase Satellite"}]},{"@id":"https://cir.nii.ac.jp/crid/1050845763744007296","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Longitudinal Structure of Oxygen Torus in the Inner Magnetosphere: Simultaneous Observations by Arase and Van Allen Probe A"}]},{"@id":"https://cir.nii.ac.jp/crid/1050852327858235264","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Plasma and Field Observations in the Magnetospheric Source Region of a Stable Auroral Red (SAR) Arc by the Arase Satellite on 28 March 2017"},{"@value":"Plasma and field observations in the magnetospheric source region of a stable auroral red (SAR) arc by the Arase satellite on March 28, 2017"}]},{"@id":"https://cir.nii.ac.jp/crid/1360011142936211584","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Isolated cold plasma regions: Observations and their relation to possible production mechanisms"}]},{"@id":"https://cir.nii.ac.jp/crid/1360021391860633856","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Plasmasphere Control of ULF Wave Distribution at Different Geomagnetic Conditions"}]},{"@id":"https://cir.nii.ac.jp/crid/1360292619538181504","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Stable auroral red arcs, sinks for energy of<i>D</i><sub><i>st</i></sub>main phase"}]},{"@id":"https://cir.nii.ac.jp/crid/1360292620333783040","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Thermal ion composition measurements of the formation of the new outer plasmasphere and double plasmapause during storm recovery phase"}]},{"@id":"https://cir.nii.ac.jp/crid/1360292621284034560","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Smooth electron density transition from plasmasphere to the subauroral region"}]},{"@id":"https://cir.nii.ac.jp/crid/1360574093479684096","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Solar wind influence on the oxygen content of ion outflow in the high‐altitude polar cap during solar minimum conditions"}]},{"@id":"https://cir.nii.ac.jp/crid/1360574096122127872","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Heavy ion density enhancements in the outer plasmasphere"}]},{"@id":"https://cir.nii.ac.jp/crid/1360855568960019072","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Ion composition in the plasma trough and plasma plume derived from a Combined Release and Radiation Effects Satellite magnetoseismic study"}]},{"@id":"https://cir.nii.ac.jp/crid/1360855569619849856","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"The motion of a proton in the equatorial magnetosphere"}]},{"@id":"https://cir.nii.ac.jp/crid/1360861707151572864","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Alfvén velocity sudden increase as an indicator of the plasmapause"}]},{"@id":"https://cir.nii.ac.jp/crid/1360865815685070080","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Polarization and Spatial Distribution Features of Pc4 and Pc5 Waves in the Magnetosphere"}]},{"@id":"https://cir.nii.ac.jp/crid/1361137044050689536","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Mass density inferred from toroidal wave frequencies and its comparison to electron density"}]},{"@id":"https://cir.nii.ac.jp/crid/1361137046083669888","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Observations of the warm plasma cloak and an explanation of its formation in the magnetosphere"}]},{"@id":"https://cir.nii.ac.jp/crid/1361418519581184768","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Preliminary statistical survey of plasmaspheric ion properties from observations by DE 1/RIMS"}]},{"@id":"https://cir.nii.ac.jp/crid/1361418521406584576","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Plasmasphere‐ionosphere coupling: 2. Ion composition measurements at plasmaspheric and ionospheric altitudes and comparison with modeling results"}]},{"@id":"https://cir.nii.ac.jp/crid/1362262944836030720","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Low energy neutral atoms in the magnetosphere"}]},{"@id":"https://cir.nii.ac.jp/crid/1362544418505326720","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Ionospheric mass ejection in response to a CME"}]},{"@id":"https://cir.nii.ac.jp/crid/1362544418795831296","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"A semiempirical model of large-scale magnetospheric electric fields"}]},{"@id":"https://cir.nii.ac.jp/crid/1362825894322590080","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"A new model of the location of the plasmapause: CRRES results"}]},{"@id":"https://cir.nii.ac.jp/crid/1362825895314472192","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Simulation of Van Allen Probes plasmapause encounters"}]},{"@id":"https://cir.nii.ac.jp/crid/1362825896234528640","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Unified theory of SAR arc formation at the plasmapause"}]},{"@id":"https://cir.nii.ac.jp/crid/1363107368772144512","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Solar cycle variation of plasma mass density in the outer magnetosphere: Magnetoseismic analysis of toroidal standing Alfvén waves detected by Geotail"}]},{"@id":"https://cir.nii.ac.jp/crid/1363388843807767808","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Dual‐spacecraft measurements of plasmasphere‐ionosphere coupling"}]},{"@id":"https://cir.nii.ac.jp/crid/1363388844866079488","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Parallel acceleration and transport of ions from polar ionosphere to plasma sheet"}]},{"@id":"https://cir.nii.ac.jp/crid/1363388845228755712","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Heavy ion mass loading of the geomagnetic field near the plasmapause and ULF wave implications"}]},{"@id":"https://cir.nii.ac.jp/crid/1363388845291289984","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Initial observations of thermal plasma composition and energetics from Dynamics Explorer‐1"}]},{"@id":"https://cir.nii.ac.jp/crid/1363670320547898112","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Distribution in magnetotail of O<sup>+</sup> ions from cusp/cleft ionosphere: A possible substorm trigger"}]},{"@id":"https://cir.nii.ac.jp/crid/1363951794064249216","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Storm phase dependence of ion outflow: Statistical signatures obtained by IMAGE/LENA"}]},{"@id":"https://cir.nii.ac.jp/crid/1363951794870211712","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Fate of outflowing suprathermal oxygen ions that originate in the polar ionosphere"}]},{"@id":"https://cir.nii.ac.jp/crid/1363951795030675456","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Solar cycle variation of geosynchronous plasma mass density derived from the frequency of standing Alfvén waves"}]},{"@id":"https://cir.nii.ac.jp/crid/1363951796099853184","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"On the presence and properties of cold ions near Earth's equatorial magnetosphere"}]},{"@id":"https://cir.nii.ac.jp/crid/1364233270829968512","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Alfven wave resonances in a realistic magnetospheric magnetic field geometry"}]},{"@id":"https://cir.nii.ac.jp/crid/1370004229804119047","@type":"Product","relationType":["references"]},{"@id":"https://cir.nii.ac.jp/crid/1370013245744573057","@type":"Product","relationType":["references"]},{"@id":"https://cir.nii.ac.jp/crid/1370016861606563716","@type":"Product","relationType":["references"]},{"@id":"https://cir.nii.ac.jp/crid/1370021389801935112","@type":"Product","relationType":["references"]},{"@id":"https://cir.nii.ac.jp/crid/1370021389801935147","@type":"Product","relationType":["references"]},{"@id":"https://cir.nii.ac.jp/crid/1370569767734509058","@type":"Product","relationType":["references"]},{"@id":"https://cir.nii.ac.jp/crid/1370569767734509059","@type":"Product","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"The retarding ion mass spectrometer on dynamics explorer‐A"}]},{"@id":"https://cir.nii.ac.jp/crid/2050870367075034240","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Oxygen torus and its coincidence with EMIC wave in the deep inner magnetosphere : Van Allen Probe B and Arase observations"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1002/2014ja020593"},{"@type":"KAKEN","@value":"PRODUCT-20619027"},{"@type":"KAKEN","@value":"PRODUCT-15298236"},{"@type":"KAKEN","@value":"PRODUCT-14843798"},{"@type":"OPENAIRE","@value":"doi_dedup___::a6a71dae6bdf7150894a4ebc27d0c03a"},{"@type":"CROSSREF","@value":"10.1029/2018gl080122_references_DOI_1ZUp1GE6vppOGAroT2oWt7F9gHT"},{"@type":"CROSSREF","@value":"10.1029/2020ja028068_references_DOI_1ZUp1GE6vppOGAroT2oWt7F9gHT"},{"@type":"CROSSREF","@value":"10.1029/2023ja031675_references_DOI_1ZUp1GE6vppOGAroT2oWt7F9gHT"},{"@type":"CROSSREF","@value":"10.1186/s40623-020-01235-w_references_DOI_1ZUp1GE6vppOGAroT2oWt7F9gHT"},{"@type":"CROSSREF","@value":"10.1029/2021ja029840_references_DOI_1ZUp1GE6vppOGAroT2oWt7F9gHT"},{"@type":"CROSSREF","@value":"10.1016/j.jastp.2023.106040_references_DOI_1ZUp1GE6vppOGAroT2oWt7F9gHT"},{"@type":"CROSSREF","@value":"10.1029/2023ja031674_references_DOI_1ZUp1GE6vppOGAroT2oWt7F9gHT"}]}