{"created":"2023-05-15T14:35:59.765730+00:00","id":46326,"links":{},"metadata":{"_buckets":{"deposit":"c45599aa-658e-4ee6-a327-727f3a9db635"},"_deposit":{"created_by":1,"id":"46326","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"46326"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00046326","sets":["1"]},"author_link":["461531","461533","461532","461530"],"item_8_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2012-07","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"15","bibliographicPageEnd":"27","bibliographicPageStart":"20","bibliographicVolumeNumber":"430","bibliographic_titles":[{"bibliographic_title":"Science of The Total Environment"}]}]},"item_8_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"The 239+240Pu concentrations and 240Pu/239Pu atom ratios were determined by alpha\nspectrometry and double-focusing SF-ICP-MS for seawater samples from two stations,\none at the equator and the other in the equatorial South Pacific Ocean. The 239Pu, 240Pu and 239+240Pu inventories over the depth interval 0-3000 m at the equator station were10.4 +/- 0.5, 8.9 +/- 0.5 and 19.3 +/- 0.9 Bq m-2, respectively. No noticeable difference was observed in 239Pu, 240Pu and 239+240Pu inventories over the depth interval 0-3000 m between the two stations. The total 239+240Pu inventories were significantly higher than that of the expected deposition density of global fallout. The decreasing rates of 239+240Pu over the depth interval 0-1000 m were estimated to be 0.89 +/- 0.07 Bq m-2 yr-1 at the equator station and 0.16 +/- 0.07 Bq m-2 yr-1 at the equatorial South Pacific Ocean station. The obtained 240Pu/239Pu atom ratios in the equatorial Pacific Ocean were higher than the mean global fallout ratio of 0.18. These high atom ratios proved the existence\nof close-in tropospheric fallout Pu from the Pacific Proving Grounds (PPG) in the\nMarshall Islands. The 239+240Pu inventories originating from the close-in fallout in the full depth of the water column were estimated to be 11.1 Bq m-2 at the equator station and 7.1 Bq m-2 at the equatorial South Pacific Ocean station, and the relative percentages of close-in fallout Pu were 40 % at the former and 34 % at the latter. A significant amount of close-in tropospheric fallout Pu originating from the PPG has been transported to deep layers below the 1000 m depth in the equatorial Pacific Ocean.","subitem_description_type":"Abstract"}]},"item_8_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0048-9697","subitem_source_identifier_type":"ISSN"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"metadata only access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_14cb"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Yamada, Masatoshi"}],"nameIdentifiers":[{"nameIdentifier":"461530","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Zheng, Jian"}],"nameIdentifiers":[{"nameIdentifier":"461531","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"山田 正俊","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"461532","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"鄭 建","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"461533","nameIdentifierScheme":"WEKO"}]}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"239Pu and 240Pu inventories and 240Pu/239Pu atom ratios in the equatorial Pacific Ocean water column","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"239Pu and 240Pu inventories and 240Pu/239Pu atom ratios in the equatorial Pacific Ocean water column"}]},"item_type_id":"8","owner":"1","path":["1"],"pubdate":{"attribute_name":"公開日","attribute_value":"2012-05-21"},"publish_date":"2012-05-21","publish_status":"0","recid":"46326","relation_version_is_last":true,"title":["239Pu and 240Pu inventories and 240Pu/239Pu atom ratios in the equatorial Pacific Ocean water column"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-15T23:53:11.146896+00:00"}