{"@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/1362825893956204288.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1126/science.aau0747"}},{"identifier":{"@type":"URI","@value":"https://syndication.highwire.org/content/doi/10.1126/science.aau0747"}},{"identifier":{"@type":"URI","@value":"https://www.science.org/doi/pdf/10.1126/science.aau0747"}}],"dc:title":[{"@value":"Atmospheric\n            <sup>14</sup>\n            C/\n            <sup>12</sup>\n            C changes during the last glacial period from Hulu Cave"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>The whole story</jats:title>\n          <jats:p>\n            An accurate, precise record of the carbon-14 (\n            <jats:sup>14</jats:sup>\n            C) content of the atmosphere is important for developing chronologies in climate change, archaeology, and many other disciplines. Cheng\n            <jats:italic>et al.</jats:italic>\n            provide a record that covers the full range of the\n            <jats:sup>14</jats:sup>\n            C dating method (∼54,000 years), using paired measurements of\n            <jats:sup>14</jats:sup>\n            C/\n            <jats:sup>12</jats:sup>\n            C and thorium-230 (\n            <jats:sup>230</jats:sup>\n            Th) ages from two stalagmites from Hulu Cave, China. The advantage of matching absolute\n            <jats:sup>230</jats:sup>\n            Th ages and\n            <jats:sup>14</jats:sup>\n            C/\n            <jats:sup>12</jats:sup>\n            C allowed the authors to fashion a seamless record from a single source with low uncertainties, particularly in the older sections.\n          </jats:p>\n          <jats:p>\n            <jats:italic>Science</jats:italic>\n            , this issue p.\n            <jats:related-article xmlns:xlink=\"http://www.w3.org/1999/xlink\" ext-link-type=\"doi\" issue=\"6420\" page=\"1293\" related-article-type=\"in-this-issue\" vol=\"362\" xlink:href=\"10.1126/science.aau0747\">1293</jats:related-article>\n          </jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380853567687974414","@type":"Researcher","foaf:name":[{"@value":"Hai Cheng"}],"jpcoar:affiliationName":[{"@value":"Institute of Global Environmental Change, Xi’an Jiaotong University, China."},{"@value":"Department of Earth Sciences, University of Minnesota, Minneapolis, MN, USA."}]},{"@id":"https://cir.nii.ac.jp/crid/1382825893956204296","@type":"Researcher","foaf:name":[{"@value":"R. Lawrence Edwards"}],"jpcoar:affiliationName":[{"@value":"Department of Earth Sciences, University of Minnesota, Minneapolis, MN, USA."}]},{"@id":"https://cir.nii.ac.jp/crid/1382825893956204299","@type":"Researcher","foaf:name":[{"@value":"John Southon"}],"jpcoar:affiliationName":[{"@value":"Department of Earth System Science, University of California, Irvine, CA, USA."}]},{"@id":"https://cir.nii.ac.jp/crid/1382825893956204288","@type":"Researcher","foaf:name":[{"@value":"Katsumi Matsumoto"}],"jpcoar:affiliationName":[{"@value":"Department of Earth Sciences, University of Minnesota, Minneapolis, MN, USA."}]},{"@id":"https://cir.nii.ac.jp/crid/1382825893956204302","@type":"Researcher","foaf:name":[{"@value":"Joshua M. Feinberg"}],"jpcoar:affiliationName":[{"@value":"Department of Earth Sciences, University of Minnesota, Minneapolis, MN, USA."},{"@value":"Institute for Rock Magnetism, University of Minnesota, Minneapolis, MN, USA."}]},{"@id":"https://cir.nii.ac.jp/crid/1382825893956204301","@type":"Researcher","foaf:name":[{"@value":"Ashish Sinha"}],"jpcoar:affiliationName":[{"@value":"Department of Earth Science, California State University Dominguez Hills, Carson, CA, USA."}]},{"@id":"https://cir.nii.ac.jp/crid/1382825893956204298","@type":"Researcher","foaf:name":[{"@value":"Weijian Zhou"}],"jpcoar:affiliationName":[{"@value":"Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, China."}]},{"@id":"https://cir.nii.ac.jp/crid/1382825893956204290","@type":"Researcher","foaf:name":[{"@value":"Hanying Li"}],"jpcoar:affiliationName":[{"@value":"Institute of Global Environmental Change, Xi’an Jiaotong University, China."}]},{"@id":"https://cir.nii.ac.jp/crid/1382825893956204294","@type":"Researcher","foaf:name":[{"@value":"Xianglei Li"}],"jpcoar:affiliationName":[{"@value":"Institute of Global Environmental Change, Xi’an Jiaotong University, China."}]},{"@id":"https://cir.nii.ac.jp/crid/1382825893956204297","@type":"Researcher","foaf:name":[{"@value":"Yao Xu"}],"jpcoar:affiliationName":[{"@value":"Institute of Global Environmental Change, Xi’an Jiaotong University, China."}]},{"@id":"https://cir.nii.ac.jp/crid/1382825893956204291","@type":"Researcher","foaf:name":[{"@value":"Shitao Chen"}],"jpcoar:affiliationName":[{"@value":"College of Geography Science, Nanjing Normal University, Nanjing, China."}]},{"@id":"https://cir.nii.ac.jp/crid/1382825893956204300","@type":"Researcher","foaf:name":[{"@value":"Ming Tan"}],"jpcoar:affiliationName":[{"@value":"Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China."}]},{"@id":"https://cir.nii.ac.jp/crid/1382825893956204292","@type":"Researcher","foaf:name":[{"@value":"Quan Wang"}],"jpcoar:affiliationName":[{"@value":"College of Geography Science, Nanjing Normal University, Nanjing, China."}]},{"@id":"https://cir.nii.ac.jp/crid/1382825893956204289","@type":"Researcher","foaf:name":[{"@value":"Yongjin Wang"}],"jpcoar:affiliationName":[{"@value":"College of Geography Science, Nanjing Normal University, Nanjing, China."}]},{"@id":"https://cir.nii.ac.jp/crid/1382825893956204293","@type":"Researcher","foaf:name":[{"@value":"Youfeng Ning"}],"jpcoar:affiliationName":[{"@value":"Institute of Global Environmental Change, Xi’an Jiaotong University, China."}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00368075"},{"@type":"EISSN","@value":"10959203"}],"prism:publicationName":[{"@value":"Science"}],"dc:publisher":[{"@value":"American Association for the Advancement of Science 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