{"@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/1360021391860633856.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1029/2023ja031675"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2023JA031675"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Plasmasphere Control of ULF Wave Distribution at Different Geomagnetic Conditions"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title><jats:p>Magnetic storms and substorms cause global disturbances in the Earth's magnetosphere. Plasma clouds injected from the magnetotail during storm or substorm drift around the Earth and generate ultra‐low frequency (ULF) waves via various mechanisms. At the same time, the inner part of the magnetosphere called plasmasphere is filled with cold particles and its characteristics are sensitive to the geomagnetic activity level. Previous theoretical and some observational studies suggested plasmasphere and its boundary, plasmapause, are special regions for ULF waves to interact with charged particles. We present a statistical analysis of ULF waves during different geomagnetic conditions. We utilized Arase satellite magnetic field and electron density measurements from March 2017 to December 2020 to investigate spatial distribution of ULF waves and its dependence on the plasmapause location. A 1–2 <jats:italic>R</jats:italic><jats:sub><jats:italic>E</jats:italic></jats:sub> gap between the plasmapause and a region of high transverse waves occurrence rate was found. This gap keeps during quiet geomagnetic conditions when plasmasphere expands, and we concluded that the plasmapause controls the ULF wave distribution in the magnetosphere. ULF wave occurrence rate significantly decreases at quiet time, but dayside and dawnside maxima still occur for poloidal and compressional, and toroidal waves, respectively. Thus, we can distinguish internally and externally excited waves. Average wave frequency distribution revealed field‐line resonance character of toroidal waves as frequency increases toward the Earth. Poloidal and compressional waves distributions clearly distinguish low frequency externally excited waves and high frequency storm‐time pulsations.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380021391860633989","@type":"Researcher","foaf:name":[{"@value":"A. V. Rubtsov"}],"jpcoar:affiliationName":[{"@value":"Institute of Solar‐Terrestrial Physics SB RAS  Irkutsk Russia"}]},{"@id":"https://cir.nii.ac.jp/crid/1380021391860633987","@type":"Researcher","foaf:name":[{"@value":"M. Nosé"}],"jpcoar:affiliationName":[{"@value":"Institute for Space‐Earth Environmental Research Nagoya University  Nagoya Japan"},{"@value":"School of Data Science Nagoya City University  Nagoya Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380021391860633856","@type":"Researcher","foaf:name":[{"@value":"A. Matsuoka"}],"jpcoar:affiliationName":[{"@value":"Graduate School of Science Kyoto University  Kyoto Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380021391860633857","@type":"Researcher","foaf:name":[{"@value":"Y. Kasahara"}],"jpcoar:affiliationName":[{"@value":"Graduate School of Natural Science and Technology Kanazawa University  Kanazawa Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380021391860634113","@type":"Researcher","foaf:name":[{"@value":"A. Kumamoto"}],"jpcoar:affiliationName":[{"@value":"Graduate School of Science Tohoku University  Sendai Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380021391860633988","@type":"Researcher","foaf:name":[{"@value":"F. Tsuchiya"}],"jpcoar:affiliationName":[{"@value":"Graduate School of Science Tohoku University  Sendai Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380021391860633985","@type":"Researcher","foaf:name":[{"@value":"I. Shinohara"}],"jpcoar:affiliationName":[{"@value":"Institute of Space and Astronautical Science Japan Aerospace Exploration Agency  Sagamihara Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380021391860633984","@type":"Researcher","foaf:name":[{"@value":"Y. Miyoshi"}],"jpcoar:affiliationName":[{"@value":"Institute for Space‐Earth Environmental Research Nagoya University  Nagoya 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":"2023-10","prism:volume":"128","prism:number":"10"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2023JA031675"}],"createdAt":"2023-09-26","modifiedAt":"2025-05-01","project":[{"@id":"https://cir.nii.ac.jp/crid/1040003825718596480","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"20H01955"},{"@type":"JGN","@value":"JP20H01955"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20H01955/"}],"notation":[{"@language":"ja","@value":"地上電波観測による高エネルギー電子降下機構の解明と地球中層大気への影響"},{"@language":"en","@value":"Energetic electron precipitations and their impact to the middle atmosphere based on coordinated groundbased 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