{"created":"2021-03-01T06:25:33.446081+00:00","id":18166,"links":{},"metadata":{"_buckets":{"deposit":"91cb77e4-f027-4288-807d-95925d9b17b8"},"_deposit":{"id":"18166","owners":[],"pid":{"revision_id":0,"type":"depid","value":"18166"},"status":"published"},"_oai":{"id":"oai:nagoya.repo.nii.ac.jp:00018166"},"item_9_alternative_title_19":{"attribute_name":"\u305d\u306e\u4ed6\u306e\u8a00\u8a9e\u306e\u30bf\u30a4\u30c8\u30eb","attribute_value_mlt":[{"subitem_alternative_title":"Contribution of carbonate area to carbon source at Lake Biwa"}]},"item_9_biblio_info_6":{"attribute_name":"\u66f8\u8a8c\u60c5\u5831","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2013-03","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"208","bibliographicPageStart":"201","bibliographicVolumeNumber":"24","bibliographic_titles":[{"bibliographic_title":"\u540d\u53e4\u5c4b\u5927\u5b66\u52a0\u901f\u5668\u8cea\u91cf\u5206\u6790\u8a08\u696d\u7e3e\u5831\u544a\u66f8"}]}]},"item_9_description_4":{"attribute_name":"\u6284\u9332","attribute_value_mlt":[{"subitem_description":"Using newly collected data combined with data from previous studies, we compared the measured radiocarbon ages of archaeological samples, which was the  pair of charred seed and molluscan shells, and terrestrial and aquatic animal bones around Lake Biwa, and of pine needles, Phragmites, and molluscan shells, collected in 1966, 1970, 1990 and 2008 at Lake Biwa in Japan, to examine freshwater reservoir effects at Lake Biwa. We also tested for age differences in radiocarbon dating among shell species, tissues and collected locations in the lake, to evaluate the influence for radiocarbon dating of archaeological samples in Lake Biwa. The molluscan shells collected after 1990 were largely unaffected by the nuclear testing that occurred in the 1950s and 1960s, whereas the 1966 and 1970 samples appeared to be affected by it, which make the reservoir ages older than expected. The shells collected after 1990 had radiocarbon ages that were 330-450 14C years older than those of the coeval atmosphere. The apparent differences in radiocarbon age (about 300 14C years) for the pair of shell fossils and wood samples, and turtles and terrestrial mammals excavated from the same layer of the submerged Awazu shell midden at Lake Biwa suggest that the freshwater reservoir effect also existed in the middle Holocene (the Middle Jomon period, about 5000 years ago). Because the present-day average residence time of Lake Biwa water is less than a decade, its direct influence on the reservoir effect is small, which suggests that anyway old carbon has been supplied into Lake Biwa. To put it more concretely, there is the high possibility that the system as keeping the value of the freshwater reservoir effect in 300-450 14C years (steady state) function in Lake Biwa and then the closed Lake Biwa system has been in dynamic equilibrium state from 1950's up to the present, correspondingly enormous 14C input by atmospheric nuclear testing and its gradually decreasing.\u7435\u7436\u6e56\u6c34\u4e2d\u306e\u6eb6\u5b58\u7121\u6a5f\u70ad\u7d20(Dissolved Inorganic 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\u4f73\u6a39"}],"nameIdentifiers":[{"nameIdentifier":"83799","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Miyata, Yoshiki"}],"nameIdentifiers":[{"nameIdentifier":"83800","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"\u30d5\u30a1\u30a4\u30eb\u60c5\u5831","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2018-02-21"}],"displaytype":"detail","filename":"sumrua_24_201.pdf","filesize":[{"value":"4.8 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"sumrua_24_201.pdf","url":"https://nagoya.repo.nii.ac.jp/record/18166/files/sumrua_24_201.pdf"},"version_id":"d6ab6a65-e51f-4640-a178-95850353ae81"}]},"item_keyword":{"attribute_name":"\u30ad\u30fc\u30ef\u30fc\u30c9","attribute_value_mlt":[{"subitem_subject":"Freshwater reservoir effect","subitem_subject_scheme":"Other"},{"subitem_subject":"Lake Biwa","subitem_subject_scheme":"Other"},{"subitem_subject":"Carbonate","subitem_subject_scheme":"Other"},{"subitem_subject":"Average lake water residence time","subitem_subject_scheme":"Other"},{"subitem_subject":"\u6de1\u6c34\u30ea\u30b6\u30fc\u30d0\u30fc\u52b9\u679c","subitem_subject_scheme":"Other"},{"subitem_subject":"\u7435\u7436\u6e56","subitem_subject_scheme":"Other"},{"subitem_subject":"\u70ad\u9178\u5869","subitem_subject_scheme":"Other"},{"subitem_subject":"\u5e73\u5747\u6ede\u7559\u6642\u9593","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"\u8a00\u8a9e","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"\u8cc7\u6e90\u30bf\u30a4\u30d7","attribute_value_mlt":[{"resourcetype":"departmental bulletin 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