{"_buckets": {"deposit": "bba9c1b9-2230-42a6-9531-cf06eae71927"}, "_deposit": {"id": "11337", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "11337"}, "status": "published"}, "_oai": {"id": "oai:nagoya.repo.nii.ac.jp:00011337"}, "item_9_alternative_title_19": {"attribute_name": "\u305d\u306e\u4ed6\u306e\u8a00\u8a9e\u306e\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_alternative_title": "\u003c14\u003eC Concentration in Tree Stems"}]}, "item_9_biblio_info_6": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "1992-03", "bibliographicIssueDateType": "Issued"}, "bibliographicPageEnd": "149", "bibliographicPageStart": "139", "bibliographicVolumeNumber": "3", "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": "In the last report, a Japanese Cypress in Central Japan and a Seraya in Sabah-Malaysia were analyzed for ^\u003c14\u003eC concentration of annual rings (AD 1945-1983). Each of annual rings for the Japanese Cypress was devided radially into 3-4 consecutive sections. The ^\u003c14\u003eC concentrations, \u03b4^\u003c14\u003eC, of the sections were measured with a Tandetron Accelerator Mass Spectrometer in Nagoya University, compared with those of atmospheric CO_2. The good agreement was found between them. This suggested evidently that the \u03b4^\u003c14\u003eC values of the tree rings could be used to estimate the \u03b4^\u003c14\u003eC values of atmospheric ^\u003c14\u003eCO_2 in the past. \u03b4^\u003c14\u003eC variation of annual rings for the Japanese Cypress were found to be closely related with the history of executing the nuclear weapon tests in the atmosphere by considering that the residence time was about 2 years for transforming CO_2 from stratosphere to troposphere. By using a variation pattern of \u03b4^\u003c14\u003eC common to Japanese Cypress and Seraya, the average growth rate of the Seraya, that has no annual rings, was estimated to be 5.5mm/year. And a latitude dependence of the \u03b4^\u003c14\u003eC variation was found for annual rings of the trees (6\u00b0N-42\u00b0N). This phenomena seemed to be closely related with the mechanism of global mixing for bomb-produced ^\u003c14\u003eCO_2 in the atmosphere. In this report the concentrations of ^\u003c14\u003eC in annual rings of tree stems growing in the southern hemisphere were measured with the Tandetron Accelerator Mass Spectrometer. The rapid increase in atmospheric \u003c14\u003eCO_2 was caused by the nuclear weapon tests since 1950. The same increase of ^\u003c14\u003eC concentration was found in tree stems. Because the nuclear weapon tests were mainly performed at mid- and high latitude in northen hemisphere, the atmospheric ^\u003c14\u003eC concentration has latitude dependence betewen 1954-1967,but that in the southern hemisphere was independent of latitude. Our study showed the ^\u003c14\u003eC concentration in the stems grown in the southern hemisphere. And we discussed latitude dependence of the ^\u003c14\u003eC concentration in trees on the earth. Using excess ^\u003c14\u003eC as a tracer and the process to presume the time when a section had formed in a tree. 1. The ^\u003c14\u003eC concentration in the trees which had grown south of latitude 7\u00b0S were independent of latitude and remained constant. 2. The ^\u003c14\u003eC concentration of a section in a tree on the earth is necessary equal to that in the atmosphere at the latitude where the tree had grown and at the time when the section is formed. The \u03b4^\u003c14\u003eC values of the tree rings can be used to estimate those of atmospheric ^\u003c14\u003eCO_2. There are no individual variations in ^\u003c14\u003eC Concentration. 3. The time when the ^\u003c14\u003eC concentration in a tree showed the maximum value differed with the latitude where the tree had grown. 4. By considering the \u03b4^\u003c14\u003eC variations of annual rings of Japanese Cypress, Merkusii pine, Teak, Parana Pine, and Lingue, the residence time was about 1-2 years for transforming CO_2 from northern hemisphere to southern hemisphere. 5. This phenomena seemed to be closely related with the mechanism of global mixing for bomb-produced ^\u003c14\u003eCO_2 in the the troposphere. There are two big circulations in the troposphere on the earth. One goes from the equator to the north, another from the equator to the south. This mechanism of global mixing for bomb-produced ^\u003c14\u003eCO_2 in the atmosphere causes the time difference of 1-2 years in the ^\u003c14\u003eC concentrations in the southern hemisphere.", "subitem_description_type": "Abstract"}]}, "item_9_identifier_registration": {"attribute_name": "ID\u767b\u9332", "attribute_value_mlt": [{"subitem_identifier_reg_text": "10.18999/sumrua.3.139", "subitem_identifier_reg_type": "JaLC"}]}, "item_9_publisher_32": {"attribute_name": "\u51fa\u7248\u8005", "attribute_value_mlt": [{"subitem_publisher": "\u540d\u53e4\u5c4b\u5927\u5b66\u5e74\u4ee3\u6e2c\u5b9a\u8cc7\u6599\u7814\u7a76\u30bb\u30f3\u30bf\u30fc \u5929\u7136\u653e\u5c04\u6027\u5143\u7d20\u6e2c\u5b9a\u5c0f\u59d4\u54e1\u4f1a"}]}, "item_9_relation_43": {"attribute_name": "\u7570\u7248\u3067\u3042\u308b", "attribute_value_mlt": [{"subitem_relation_type": "isVersionOf", "subitem_relation_type_id": {"subitem_relation_type_id_text": "http://ci.nii.ac.jp/naid/110000475809/", 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