{"@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/1363670319201372160.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1016/j.pepi.2008.03.005"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S0031920108000514?httpAccept=text/xml"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S0031920108000514?httpAccept=text/plain"}}],"dc:title":[{"@value":"Scale variability in convection-driven MHD dynamos at low Ekman number"}],"description":[{"notation":[{"@value":"Abstract   We have undertaken a numerical study of convection-driven MHD dynamos in a rapidly rotating spherical shell with the Ekman number,  E , down to   2  ×  1    0    −  6     and the magnetic Prandtl number,  Pm , down to 0.2. We focus on the characteristic scales of the flow and the magnetic field. Smaller-scale convection vortices responsible for generating the magnetic field appear at lower Ekman numbers, while the scale of the magnetic field shows less variation compared with the flow. As a result, scale separation between the flow and the magnetic field occurs as the Ekman number is decreased. Scale separation helps dynamos to maintain the magnetic field at   P  m    1   through increase in the effective value of the magnetic Reynolds number."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1383670319201372160","@type":"Researcher","foaf:name":[{"@value":"Futoshi Takahashi"}]},{"@id":"https://cir.nii.ac.jp/crid/1420845751148123520","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"20242266"},{"@type":"NRID","@value":"1000020242266"},{"@type":"NRID","@value":"9000000195469"},{"@type":"NRID","@value":"9000022696961"},{"@type":"NRID","@value":"9000014234490"},{"@type":"NRID","@value":"9000253257171"},{"@type":"NRID","@value":"9000020114830"},{"@type":"NRID","@value":"9000254754341"},{"@type":"NRID","@value":"9000019243286"},{"@type":"NRID","@value":"9000253256206"},{"@type":"NRID","@value":"9000009497210"},{"@type":"NRID","@value":"9000252830065"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/masshima"}],"foaf:name":[{"@value":"Masaki Matsushima"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670319201372162","@type":"Researcher","foaf:name":[{"@value":"Yoshimori Honkura"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00319201"}],"prism:publicationName":[{"@value":"Physics of the Earth and Planetary Interiors"}],"dc:publisher":[{"@value":"Elsevier BV"}],"prism:publicationDate":"2008-04","prism:volume":"167","prism:number":"3-4","prism:startingPage":"168","prism:endingPage":"178"},"reviewed":"false","dc:rights":["https://www.elsevier.com/tdm/userlicense/1.0/"],"url":[{"@id":"https://api.elsevier.com/content/article/PII:S0031920108000514?httpAccept=text/xml"},{"@id":"https://api.elsevier.com/content/article/PII:S0031920108000514?httpAccept=text/plain"}],"createdAt":"2008-03-27","modifiedAt":"2020-05-03","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360567182418839424","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Ancient dynamos of terrestrial planets more sensitive to core-mantle boundary heat flows"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567182955372288","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"A detailed analysis of a dynamo mechanism in a rapidly rotating spherical shell"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567184090673152","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Implementation of a high-order combined compact difference scheme in problems of thermally driven convection and dynamo in rotating spherical shells"}]},{"@id":"https://cir.nii.ac.jp/crid/1360848657355737600","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Double diffusive convection in the Earth’s core and the morphology of the geomagnetic field"}]},{"@id":"https://cir.nii.ac.jp/crid/2050307417163395328","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Testing a toroidal magnetic field imaging method at the core-mantle boundary using a numerical dynamo model"}]},{"@id":"https://cir.nii.ac.jp/crid/2120026414560225280","@type":"OtherWorks","resourceType":"学術雑誌論文(journal article)","relationType":["isIdenticalTo"],"jpcoar:relatedTitle":[{"@value":"Scale variability in convection-driven MHD dynamos at low Ekman number"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1016/j.pepi.2008.03.005"},{"@type":"OPENAIRE","@value":"doi_dedup___::d26738fb2f9e432701f4b10d044df3df"},{"@type":"IRDB","@value":"oai:irdb.nii.ac.jp:00897:0004017100_isIdenticalTo_DOI_G8XGhUid2YlgwvzQOSdjJ31mokl"},{"@type":"CROSSREF","@value":"10.1016/j.pss.2013.04.007_references_DOI_ObzcJeSyIcHFcOlgDel0t4OVkgj"},{"@type":"CROSSREF","@value":"10.1186/s40623-014-0157-z_references_DOI_ObzcJeSyIcHFcOlgDel0t4OVkgj"},{"@type":"CROSSREF","@value":"10.1016/j.pepi.2013.11.006_references_DOI_ObzcJeSyIcHFcOlgDel0t4OVkgj"},{"@type":"CROSSREF","@value":"10.1017/jfm.2012.154_references_DOI_ObzcJeSyIcHFcOlgDel0t4OVkgj"},{"@type":"CROSSREF","@value":"10.1080/03091929.2011.565337_references_DOI_ObzcJeSyIcHFcOlgDel0t4OVkgj"}]}