{"@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/1361699994491151744.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1016/j.palaeo.2006.11.020"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S0031018206006912?httpAccept=text/xml"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S0031018206006912?httpAccept=text/plain"}},{"identifier":{"@type":"NAID","@value":"30024614733"}}],"dc:title":[{"@value":"Orbital-scale stratigraphy and high-resolution analysis of biogenic components and deep-water oxygenation conditions in the Japan Sea during the last 640 kyr"}],"description":[{"notation":[{"@value":"Abstract   Paleoceanographic conditions in the Japan Sea changed drastically during the Late Quaternary in association with orbital and suborbital cycles and glacio-eustatic sea level changes. However, few studies have examined long-term sediment records older than 160 ka because of the lack of long and continuous cores and the difficulty in constructing high-resolution age models. In this study, we first constructed an orbital-scale stratigraphy of the sediments covering the last 640 kyr by comparing the SPECMAP ∂18O curve and the ∂18O curve of planktonic foraminifera (∂18Opf) in the Japan Sea together with the combination zones of dominant planktonic foraminifera species. Then, we reconstructed temporal variations in biogenic silica (BioSil) and biogenic carbonate (BioCarb) contents calculated from high-resolution major element analysis data determined by an XRF microscanner. In order to evaluate the deep-water oxygenation conditions, we also defined excess S as the difference between the content of S in the sediments and that for normal marine sediments calculated from the organic carbon content (Corg) estimated from lightness (L⁎) by assuming a total sulfur content (Stotal)/Corg ratio of 0.36, and examined its variability. BioSil shows orbital-scale variation and is generally low except during interglacial maxima when global sea level was high enough to allow a strong influx of the Tsushima Warm Current. BioCarb shows orbital- and suborbital-scale variations and tends to be higher in dark layers deposited during glacial stages, whereas the relationship is reversed during interglacial stages. The low BioCarb in dark layers deposited during interglacial stages is probably due to dissolution of biogenic carbonate caused by the increase in surface productivity as a result of the strong influx of nutrient rich East China Sea Coastal Water and consequent increase in surface productivity and decomposition rate of organic matter in the intermediate water. Excess S tends to be higher in thicker dark layers deposited during glacial maxima when the sea level dropped below − 90 m compared to adjacent light layers, suggesting development of euxinic deep-water conditions during these periods. The results demonstrated the presence of orbital- and suborbital-scale variations in BioSil and BioCarb and their association with dark and light layers in the Japan Sea that reflect variations in the nature and strength of inflow through the Tsushima Strait controlled by both climatic and sea level changes, whereas higher excess S reflects the development of euxinic deep-water condition during glacial maxima in association with glacio-eustatic sea level drops below − 90 m during the last 640 kyr."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1381699994491151746","@type":"Researcher","foaf:name":[{"@value":"Yoshiki Kido"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699994491151873","@type":"Researcher","foaf:name":[{"@value":"Ikue Minami"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699994491151747","@type":"Researcher","foaf:name":[{"@value":"Ryuji Tada"}]},{"@id":"https://cir.nii.ac.jp/crid/1410001205535389444","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000004626561"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/fujine"}],"foaf:name":[{"@value":"Kazuho Fujine"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699994491151745","@type":"Researcher","foaf:name":[{"@value":"Tomohisa Irino"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699994491151874","@type":"Researcher","foaf:name":[{"@value":"Ken Ikehara"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699994491151744","@type":"Researcher","foaf:name":[{"@value":"Jong-Hwa Chun"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00310182"}],"prism:publicationName":[{"@value":"Palaeogeography, Palaeoclimatology, Palaeoecology"}],"dc:publisher":[{"@value":"Elsevier BV"}],"prism:publicationDate":"2007-04","prism:volume":"247","prism:number":"1-2","prism:startingPage":"32","prism:endingPage":"49"},"reviewed":"false","dc:rights":["https://www.elsevier.com/tdm/userlicense/1.0/"],"url":[{"@id":"https://api.elsevier.com/content/article/PII:S0031018206006912?httpAccept=text/xml"},{"@id":"https://api.elsevier.com/content/article/PII:S0031018206006912?httpAccept=text/plain"}],"createdAt":"2007-01-09","modifiedAt":"2022-06-24","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360002216109684736","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Orbital- and millennial-scale variations in Asian dust transport path to the Japan Sea"}]},{"@id":"https://cir.nii.ac.jp/crid/1360002216137080064","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Different nature of glacial CaCO3 constituents between MIS 2 and 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Japan Sea/East Sea"}]},{"@id":"https://cir.nii.ac.jp/crid/1360290617650448512","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Intercomparison of XRF Core Scanning Results From Seven Labs and Approaches to Practical Calibration"}]},{"@id":"https://cir.nii.ac.jp/crid/1360565166063105792","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Orbital- and millennial-scale changes of radiolarian assemblages during the last 220 kyrs in the Japan Sea"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567182373167488","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Paleotemperature response to monsoon activity in the Japan Sea during the last 160kyr"}]},{"@id":"https://cir.nii.ac.jp/crid/1360576118767685376","@type":"Article","resourceType":"学術雑誌論文(journal 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radiolarians in the Japan Sea during the last 640 kyrs"},{"@value":"過去64万年間の日本海における深海性放散虫の変遷"},{"@language":"ja-Kana","@value":"カコ 64マンネンカン ノ ニホンカイ ニ オケル シンカイセイ ホウサンチュウ ノ ヘンセン"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206240801152","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Surface environments in the Japan Sea around the last glacial maximum"},{"@language":"ja","@value":"最終氷期最盛期前後の日本海の表層環境"},{"@language":"ja-Kana","@value":"サイシュウヒョウキ サイセイキ ゼンゴ ノ ニホンカイ ノ ヒョウソウ カンキョウ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206240972928","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Fossil ostracode assemblages in the Middle Pleistocene upper part of the Sawane Formation on Sado Island, Niigata Prefecture, central Japan and surface water freshening of the Sea of 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