{"@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/1390001205449862016.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.2467/mripapers1950.17.3_218"}},{"identifier":{"@type":"COI","@value":"1:CAS:528:DyaF1cXkt1egug%3D%3D"}},{"identifier":{"@type":"URI","@value":"https://www.jstage.jst.go.jp/article/mripapers1950/17/3/17_218/_pdf"}},{"identifier":{"@type":"NAID","@value":"130004987070"}}],"dc:title":[{"@language":"en","@value":"On the Radio-carbon Age of the Ocean Waters*"},{"@value":"海洋水の放射性炭素年令について"}],"dc:language":"ja","description":[{"type":"abstract","notation":[{"@language":"en","@value":"The radioactive decay rate of radio-carbon in the ocean (1.5x10<SUP>-11</SUP>g/m<SUP>2</SUP>, y) is much smaller than the rate of biological uptake and regeneration of inorganic radio-carbon from organic matters (1 x 10<SUP>-10</SUP> g/m<SUP>2</SUP>, y)and the exchange rate at the air-sea interface (2 x 10<SUP>-10</SUP> g/m<SUP>2</SUP>, y). Therefore, the radio-carbon age of sea water is controlled not only by the radioactive decay but also by the other factors mentioned above. This is the reason for the higher age of the surface water in polar areas.<BR>The radio-carbon age of sea water in the deep layers of the oce a ns is determined by radioactive decay, the exchange of inorganic carbon between the surface and the deep layers and regeneration of the inorganic carbon through biological decomposition. Owing to the smaller concentration of the inorganic carbon at the surface layer than that in the deep layer, the specific activity of radio-carbon in the deep layer tends to decrease through mixing with surface water, which gives a higher radiocarbon age to the deep waters. Results of calculation show that when the residence time of the deep waters is 200 to 300 years and that of the surface water is 5 to 7 years, the apparent age is estimated to be about 1,300 years, which is in good accordance with the observation."},{"@value":"海水の放射性炭素の含有量から,深海水の平均寿命(一度深海に没してから, ふたたび表層に出るまでの平均時間)が求められているが,著者らは炭素の循環に着目し, 海水の平均寿命といわゆる放射性炭素年令との間の関係を明らかにした。<BR>海水中の放射性炭素は放射能壊変にのみ支配されるものではなく, 生物による摂取, 大気-海洋間の交換,表層- 深層間の交換,有機物の分解による無機炭素の再生産を考慮しなければならない。<BR>計算の結果は,平均寿命として表面水については5～7年,深層水については200～300年という値が得られた。これらは従来考えられている深海水の1000年をこえる値にくらべると, かなり小さい。"}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1410001205449862016","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000283673552"}],"foaf:name":[{"@language":"en","@value":"Miyake Y."}],"jpcoar:affiliationName":[{"@language":"en","@value":"Meteorological Research Institute, Tokyo"}]},{"@id":"https://cir.nii.ac.jp/crid/1410001205449862017","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000283673553"}],"foaf:name":[{"@language":"en","@value":"Saruhashi K."}],"jpcoar:affiliationName":[{"@language":"en","@value":"Meteorological Research Institute, Tokyo"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"0031126X"}],"prism:publicationName":[{"@language":"en","@value":"Papers in Meteorology and Geophysics"},{"@value":"Papers in Meteorology and Geophysics"},{"@language":"en","@value":"Pap.Met.Geophy"},{"@value":"気象研究所研究報告"}],"dc:publisher":[{"@language":"en","@value":"Japan Meteorological Agency"}],"prism:publicationDate":"1966","prism:volume":"17","prism:number":"3","prism:startingPage":"218","prism:endingPage":"223"},"reviewed":"false","url":[{"@id":"https://www.jstage.jst.go.jp/article/mripapers1950/17/3/17_218/_pdf"}],"availableAt":"1966","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=Atmospheric%20Science","dc:title":"Atmospheric Science"},{"@id":"https://cir.nii.ac.jp/all?q=Geophysics","dc:title":"Geophysics"}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1390001206564509440","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"An Estimate of the Vertical Diffusivity of the Deep Water"},{"@value":"深層水の鉛直渦動拡散係数の見積り"},{"@language":"ja-Kana","@value":"シンソウスイ ノ エンチョク カドウ カクサン ケイスウ ノ ミツモリ"}]},{"@id":"https://cir.nii.ac.jp/crid/2050025942148540288","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Rapid water parcel transport across the Kuroshio Extension in the lower thermocline from dissolved oxygen measurements by Seaglider"}]}],"dataSourceIdentifier":[{"@type":"JALC","@value":"oai:japanlinkcenter.org:1001622429"},{"@type":"CROSSREF","@value":"10.2467/mripapers1950.17.3_218"},{"@type":"CIA","@value":"130004987070"},{"@type":"CROSSREF","@value":"10.1186/s40645-021-00406-x_references_DOI_UQEoTwjRBabIZer5J7ssiFkJrTD"},{"@type":"CROSSREF","@value":"10.1007/bf02108758_references_DOI_UQEoTwjRBabIZer5J7ssiFkJrTD"}]}