{"@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/1050856995321456512.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"HDL","@value":"https://hdl.handle.net/20.500.14094/90009160"}},{"identifier":{"@type":"DOI","@value":"10.1038/s43247-022-00401-0"}},{"identifier":{"@type":"URI","@value":"https://www.nature.com/articles/s43247-022-00401-0.pdf"}},{"identifier":{"@type":"URI","@value":"https://www.nature.com/articles/s43247-022-00401-0"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@language":"en","@value":"Intermittent non-axial dipolar-field dominance of twin Laschamp excursions"}],"dc:language":"en","description":[{"type":"Abstract","notation":[{"@language":"en","@value":"Geomagnetic excursions represent the dynamic nature of the geodynamo. Accumulated palaeomagnetic records indicate that such excursions are dominated by dipolar-fields, but exhibit different structures. Here we report a palaeomagnetic record from the varved sediments of Lake Suigetsu, central Japan, which reveals fine structures in the Laschamp Excursion and a new post-Laschamp excursion that coincides with the Δ14C maxima. The record's high-resolution chronology provides IntCal20 mid-ages and varve-counted durations. Both excursions comprise multiple subcentennial directional-swings. Simulations of filtering effects on sediment-magnetisations demonstrate that this high-resolution record replicates most of the features in existing, lower-resolution Laschamp excursion records, including the apparent clockwise open-loop of the virtual geomagnetic pole pass. The virtual geomagnetic poles during the ‘swing’ phases make four clusters centred in hemispherically-symmetric regions, three of which encompass the virtual geomagnetic poles associated with the Laschamp Excursion recorded in lavas at various locations. The stationary dipolar-field sources under each cluster should have intermittently dominated one after another during the excursions."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1420282801199108096","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"60183919"},{"@type":"NRID","@value":"1000060183919"},{"@type":"NRID","@value":"9000254263063"},{"@type":"NRID","@value":"9000411072973"},{"@type":"NRID","@value":"9000258410657"},{"@type":"NRID","@value":"9000406329592"},{"@type":"NRID","@value":"9000368412353"},{"@type":"NRID","@value":"9000020142342"},{"@type":"NRID","@value":"9000020097720"},{"@type":"NRID","@value":"9000014159242"},{"@type":"NRID","@value":"9000391785207"},{"@type":"NRID","@value":"9000412366585"},{"@type":"NRID","@value":"9000001756025"},{"@type":"NRID","@value":"9000386337417"},{"@type":"NRID","@value":"9000266428527"},{"@type":"NRID","@value":"9000347191482"},{"@type":"NRID","@value":"9000411072953"},{"@type":"NRID","@value":"9000403324045"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/masayuki_hyodo"}],"foaf:name":[{"@language":"en","@value":"Hyodo, Masayuki"},{"@language":"ja","@value":"兵頭, 政幸"},{"@language":"ja-Kana","@value":"ヒョウドウ, マサユキ"}]},{"@id":"https://cir.nii.ac.jp/crid/1070856995321456516","@type":"Researcher","foaf:name":[{"@language":"en","@value":"Nakagawa, Takeshi"}]},{"@id":"https://cir.nii.ac.jp/crid/1070856995321456526","@type":"Researcher","foaf:name":[{"@language":"en","@value":"Matsushita, Hayato"}]},{"@id":"https://cir.nii.ac.jp/crid/1070856995321456522","@type":"Researcher","foaf:name":[{"@language":"en","@value":"Kitaba, Ikuko"}]},{"@id":"https://cir.nii.ac.jp/crid/1070856995321456521","@type":"Researcher","foaf:name":[{"@language":"en","@value":"Yamada, Keitaro"}]},{"@id":"https://cir.nii.ac.jp/crid/1070856995321456525","@type":"Researcher","foaf:name":[{"@language":"en","@value":"Tanabe, Shota"}]},{"@id":"https://cir.nii.ac.jp/crid/1070856995321456514","@type":"Researcher","foaf:name":[{"@language":"en","@value":"Bradak, Balazs"}]},{"@id":"https://cir.nii.ac.jp/crid/1070856995321456523","@type":"Researcher","foaf:name":[{"@language":"en","@value":"Miki, Masako"}]},{"@id":"https://cir.nii.ac.jp/crid/1070856995321456524","@type":"Researcher","foaf:name":[{"@language":"en","@value":"McLean, Danielle"}]},{"@id":"https://cir.nii.ac.jp/crid/1070856995321456518","@type":"Researcher","foaf:name":[{"@language":"en","@value":"Staff, Richard A."}]},{"@id":"https://cir.nii.ac.jp/crid/1070856995321456520","@type":"Researcher","foaf:name":[{"@language":"en","@value":"Smith, Victoria C."}]},{"@id":"https://cir.nii.ac.jp/crid/1070856995321456515","@type":"Researcher","foaf:name":[{"@language":"en","@value":"Albert, Paul G."}]},{"@id":"https://cir.nii.ac.jp/crid/1070856995321456512","@type":"Researcher","foaf:name":[{"@language":"en","@value":"Ramsey, Christopher Bronk"}]},{"@id":"https://cir.nii.ac.jp/crid/1070856995321456519","@type":"Researcher","foaf:name":[{"@language":"en","@value":"Yamasaki, Akiteru"}]},{"@id":"https://cir.nii.ac.jp/crid/1070856995321456517","@type":"Researcher","foaf:name":[{"@language":"en","@value":"Kitagawa, Junko"}]}],"publication":{"publicationIdentifier":[{"@type":"EISSN","@value":"26624435"}],"prism:publicationName":[{"@language":"en","@value":"Communications Earth & Environment"}],"dc:publisher":[{"@value":"Springer Nature"}],"prism:publicationDate":"2022-04-04","prism:volume":"3","prism:number":"1","prism:startingPage":"79"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","dc:rights":["© The Author(s) 2022.","This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/."],"url":[{"@id":"https://www.nature.com/articles/s43247-022-00401-0.pdf"},{"@id":"https://www.nature.com/articles/s43247-022-00401-0"}],"availableAt":"2022-04-25","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=Environmental%20sciences","dc:title":"Environmental sciences"},{"@id":"https://cir.nii.ac.jp/all?q=QE1-996.5","dc:title":"QE1-996.5"},{"@id":"https://cir.nii.ac.jp/all?q=550","dc:title":"550"},{"@id":"https://cir.nii.ac.jp/all?q=Geology","dc:title":"Geology"},{"@id":"https://cir.nii.ac.jp/all?q=GE1-350","dc:title":"GE1-350"}],"project":[{"@id":"https://cir.nii.ac.jp/crid/1040000781998346880","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"18K03804"},{"@type":"JGN","@value":"JP18K03804"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18K03804/"}],"notation":[{"@language":"ja","@value":"中期更新世初期と完新世の太陽活動による気候リズム"},{"@language":"en","@value":"Climate rhythm by solar activity during the early middle Pleistocene and the Holocene"}]}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050012570391873408","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"A centennial-resolution terrestrial climatostratigraphy and Matuyama–Brunhes transition record from a loess sequence in China"}]},{"@id":"https://cir.nii.ac.jp/crid/1360002216137416064","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"SG06, a fully continuous and varved sediment core from Lake Suigetsu, Japan: stratigraphy and potential for improving the radiocarbon calibration model and understanding of late Quaternary climate changes"}]},{"@id":"https://cir.nii.ac.jp/crid/1360009142731138048","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"The IntCal20 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