Historical Climate Changes (CO_2 Increase) and the Prediction (Preliminary Sutudy) --Using Japanese, Canadian and French Tree Rings--

历史气候变化（CO_2增加）和预测（初步研究）--使用日本、加拿大和法国的树木年轮--

• 批准号: 06044253
• 负责人: SUZUKI Tetsu
• 金额: --
• 依托单位: Niigata University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Overseas Scientific Survey.
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 无数据
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06044253/
• 关键词: Greenhouse Gas; Historical Changes of CO_2; Tree Rings; Stable Carbon Ratio; delta^<13>C

Preliminary Analysis of Tree Rings for Historical Changes of Greenhouse Gas (CO_2) Concentrations--Using Japanese-Canadian-French Tree Rings.In order to pinpoint the causes of recent increase in CO_2 concentrations of the air, tree rings which record long term environmental conditions can be the most reliable method. The plausible causes include : (1) human combustion of the fossil fuels which produce a lower stable carbon isotopic ratio (^<13>C/^<12>C or delta^<13>C), (2) other human activities such as creation of farm land from forest, (3) natural phenomena such as a change of deep ocean current and (4) a combination of the above three. The usage of ice cores determining the concentration changes of CO_2 during the last 1000 years is limited by the low time resolution of air bubble formation.The cellulose of the late wood in tree rings may have been recording more accurate changes ot the surrounding environmental conditions including CO2 concentrations in the air. Tree rings have not … More only the clear record of the history up to several thousand years but also dead wood could be preserved for many millennium in the natural environment. The data from Germany suggested that the recent rapid CO2 increase was not caused solely by the human activity of fossil fuel burning.The objective of this investigation was to validate this information using tree rings from Japan. A typical 78 years old sugi tree (Cryptomeria japonica D.Don) was harvested from an environment where temperature, humidity and precipitation are different from those obtained in Europe. The delta^<13>C values were obtained using a mass-spectrometer after the tree rings were separated into 7 samples : (1) 1920-29, (2) 1930-39, .. (7) 1980-88. The delta^<13>C analysis of sample (1), (3), (5) and (7), were -22.31*, -22.65*, -23.35* and -24.03*, respectively. The number of analytical data were limited to four samples, thus it is very difficult to draw substantiated conclusions out of this preliminary investigation. Two findings, however, can be expressed : (1) it is possible to measure delta^<13>C values using Japanese sugi and (2) the obtained delta^<13>C values were in a reasonable range. Less

对温室气体历史变化（CO_2）浓度的树环的初步分析 - 使用日语查明co_2空气浓度重新捕获的原因可能是合理的原因包括：（1）产生化石燃料的人类燃烧（^） <13> c/^<12> c或delta^<13> c），（2）其他人类活动，例如创造农场森林，自然现象，例如深海流的变化（4）在过去1000年中确定CO_2的浓度变化的冰芯的使用受气泡形成的低时间分辨率的限制。晚期木材的蜂窝结合可能是g更准确的变化，包括周围环境条件，包括树木中的二氧化碳浓度戒指没有……更多的历史，但在自然的NT中也是死者。从日本验证树木。在样本（5）和（7）中，-22.31*，-23.35*限制为四个样本，因此很难从此前提出实质性结论。 ^<13>使用日本SUGI和（2）获得的Delta^<13> C值在合理的范围内。

项目成果

馬原保典・工藤章: "長崎原爆から放出されたプルトニウム--環境中での移動性(英文)" 国際学会誌・放射能応用と同位体元素. (印刷中). (1995)

Yasunori Umahara 和 Akira Kudo：“长崎原子弹释放的钚 - 环境中的流动性（英文）”国际放射性应用和同位素杂志（1995 年出版）。

Kudo, A., Mahara, Y., Santry, D.C., Suzuki, T., Miyahara, S., Sugahara, M., Zheng, J.and Garrec, J.-P.: "Plutonium mass balance released from the Nagasaki A-Bomb and the applicability for future environmental reseach." J.of Applied Radiation and Isotopes.

Kudo, A.、Mahara, Y.、Santry, D.C.、Suzuki, T.、Miyahara, S.、Sugahara, M.、Zheng, J. 和 Garrec, J.-P.：“长崎核电站释放的钚质量平衡

編・著者 工藤章・D.C.サントリ-: "環境中におけるプルトニウム" バ-ガモン出版社(英国オクスフォード)(印刷中), (1995)

由 Akira Kudo 和 D.C. Santory 编辑和撰写：“环境中的钚”Bergamon Publishing（英国牛津）（正在出版），（1995 年）

鈴木哲: "重金属(Cd,CuおよびHg)汚染地のスギの年輪解析のよる汚染歴史の解明(英文)" アジア・太平洋地域国際年輪年代学会議論文集. (印刷中). (1995)

Satoshi Suzuki：“通过重金属（Cd、Cu 和 Hg）污染地区雪松树年轮分析阐明污染历史（英文）”亚太地区国际树木年代学会议论文集（英文）。正在出版）（1995）。

工藤章・馬原保典・D.C.サントリ- 鈴木哲・宮原昭二郎・菅原正孝・J.-P.ガレック: "長崎原爆から放出されたプルトニウムの物質収支は、環境研究への応用の可能性(英文)" 国際学会誌・放射能応用と同位体元素. (印刷中). (1995)

Akira Kudo、Yasunori Umahara、D.C. Suntory、Satoshi Suzuki、Shojiro Miyahara、Masataka Sukawara、J.-P Galek：“长崎原子弹释放的钚的质量平衡在环境研究中具有潜在应用（英文）”放射性应用和同位素元素（正在出版）（1995）。