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  1. F300 宇宙地球環境研究所
  2. F300b 紀要
  3. 名古屋大学加速器質量分析計業績報告書
  4. 21

環境試料の^<14>C濃度変動 : 名古屋大学東山キャンパスに生育する松の葉の^<14>C濃度の経年変動と生育場所依存性

https://doi.org/10.18999/sumrua.21.126
https://doi.org/10.18999/sumrua.21.126
38d4eb1f-3b13-4024-a705-e358ce1da901
名前 / ファイル ライセンス アクション
21-19.pdf 21-19.pdf (5.3 MB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2011-05-11
タイトル
タイトル 環境試料の^<14>C濃度変動 : 名古屋大学東山キャンパスに生育する松の葉の^<14>C濃度の経年変動と生育場所依存性
言語 ja
その他のタイトル
その他のタイトル Variations of ^<14>C Concentration for Environmental Samples : Secular Variation and Locality Dependence of ^<14>C Concentration of Pine Needles Collected from the Higashiyama Campus of Nagoya University
言語 en
著者 中村, 俊夫

× 中村, 俊夫

WEKO 83108

ja 中村, 俊夫

Search repository
太田, 友子

× 太田, 友子

WEKO 83109

ja 太田, 友子

Search repository
NAKAMURA, Toshio

× NAKAMURA, Toshio

WEKO 83110

en NAKAMURA, Toshio

Search repository
OHTA, Tomoko

× OHTA, Tomoko

WEKO 83111

en OHTA, Tomoko

Search repository
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
キーワード
主題Scheme Other
主題 atmospheric CO2
キーワード
主題Scheme Other
主題 ^<14>C concentration
キーワード
主題Scheme Other
主題 Suess effect
キーワード
主題Scheme Other
主題 fossil fuel
キーワード
主題Scheme Other
主題 pine needle
キーワード
主題Scheme Other
主題 大気中二酸化炭素
キーワード
主題Scheme Other
主題 ^<14>C濃度
キーワード
主題Scheme Other
主題 シュース効果
キーワード
主題Scheme Other
主題 化石燃料
キーワード
主題Scheme Other
主題 松葉
抄録
内容記述 ^<14>C concentrations were measured for needle leaves from pine trees growing several locations on the Higashiyama campus of Nagoya University, in the east suburbs of Nagoya city, Aichi prefecture, central Japan, to investigate the local Suess effect of diluting ^<14>C concentration in the atmosphere by ^<14>C-free CO2 exhausted in combustion of fossil fuel, in particular, that from motor vehicles in Nagoya city. Pine needles formed in the previous year were collected in early spring before the formation of any new-year needles. The pine-needle samples collected from the campus were rinsed with acetone and distilled water using a supersonic cleaner and processed chemically by an acid-alkali-acid treatment to get rid of fats and oils as well as other pollutions contaminating the sample surface, and finally dried in an electric oven. A part of the samples were combusted to produce CO2 and the produced CO2 was changed to graphite for ^<14>C measurements with an AMS ^<14>C system at Nagoya University. The measured ^<14>C concentration was given in the ratio of sample ^<14>C/^<12>C to that of standard. For both sample and standard, isotopic fractionation was corrected. In addition, the decrease of ^<14>C concentration by radioactive decay for the sample from the year of collection to the year of ^<14>C measurement, and that for the standard from AD1950 to the year of ^<14>C measurement, were corrected. The following results were obtained in the present experiment: (1) ^<14>C concentrations were lower for the needles grown along the road with heavy traffic by about 1-2.5% than those grown at other places in the campus. This is caused by the local dilution of atmospheric ^<14>CO2 by ^<14>C-free CO2 exhausted from motor vehicles. (2) the values of ^<14>C concentration in average for the needles grown in the Higashiyama Campus were lower by 6.2% and 7.4% in 2005 and 2008, respectively, compared to an average value of 1.081±0.016 for the plants grown in the rather clean atmosphere almost free from artificial CO2 at the Tibetian Plateau at the altitude of 5000m above the mean sea level. (3) ^<14>C concentrations of the needle samples grown at the Higashiyama campus in 2008 is lower than those grown in 2005. This suggests that the Suess effect is getting larger in the Nagoya city area by about 1% in 2008 than in 2005.
言語 en
内容記述タイプ Abstract
内容記述
内容記述 第22回名古屋大学年代測定総合研究センターシンポジウム平成21(2009)年度報告
言語 ja
内容記述タイプ Other
出版者
言語 ja
出版者 名古屋大学年代測定資料研究センター
言語
言語 jpn
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ departmental bulletin paper
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
ID登録
ID登録 10.18999/sumrua.21.126
ID登録タイプ JaLC
書誌情報 ja : 名古屋大学加速器質量分析計業績報告書

巻 21, p. 126-135, 発行日 2010-03
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