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The δ\u003c^13\u003eC values of soil respired CO_2,which were obtained by the isotopic mass balance using the chamber method, showed seasonal fluctuations ranging from -31.0 to -24.5‰ with low values from summer to autumn and high ones from winter to spring. Seasonal variation in soil air CO_2 showed high concentraiton and low δ\u003c^13\u003eC value in summer, and low concentration and high δ\u003c^13\u003eC value in winter. They ranged from 0.1 to 3.4% (0.8-3.0% in vertically) in concentration and from -23.7 to -18.1‰ (0.3-4.6‰ in vertically) in δ\u003c^13\u003eC. CO_2 concentration in soil air increased gradually with depth, whereas the δ\u003c^13\u003eC value decreased suddenly at the depth from 10 to 20cm and remained relatively constant below 20cm. The seasonal δ\u003c^13\u003eC fluctuation of soil respired CO_2 was influenced by CO_2 production at a shallow depth in soil (\u003c10cm). 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Seasonal variations of concentration and δ<13>^C in soil air CO_2 and soil respired CO_2
https://doi.org/10.18999/sumrua.12.147
https://doi.org/10.18999/sumrua.12.1477f0b93d6-11b2-4f25-97b6-6dbb7d7c796f
名前 / ファイル | ライセンス | アクション |
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2010-05-31 | |||||
タイトル | ||||||
タイトル | Seasonal variations of concentration and δ<13>^C in soil air CO_2 and soil respired CO_2 | |||||
著者 |
Takahashi, Hiroshi Aoki
× Takahashi, Hiroshi Aoki× Konohira, Eiichi× Hiyama, Tetsuya× Nakamura, Toshio× Yoshida, Naohiro |
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権利 | ||||||
権利情報 | 名古屋大学年代測定資料研究センター 天然放射性元素測定小委員会 | |||||
権利 | ||||||
権利情報 | 本文データは学協会の許諾に基づきCiNiiから複製したものである | |||||
抄録 | ||||||
内容記述 | Seasonal changes of δ<^13>C of soil respired CO_2 and vertical profiles of soil air CO_2 concentration and δ<^13>C are discussed at an urban deciduous forest in Nagoya City, central Japan. The δ<^13>C values of soil respired CO_2,which were obtained by the isotopic mass balance using the chamber method, showed seasonal fluctuations ranging from -31.0 to -24.5‰ with low values from summer to autumn and high ones from winter to spring. Seasonal variation in soil air CO_2 showed high concentraiton and low δ<^13>C value in summer, and low concentration and high δ<^13>C value in winter. They ranged from 0.1 to 3.4% (0.8-3.0% in vertically) in concentration and from -23.7 to -18.1‰ (0.3-4.6‰ in vertically) in δ<^13>C. CO_2 concentration in soil air increased gradually with depth, whereas the δ<^13>C value decreased suddenly at the depth from 10 to 20cm and remained relatively constant below 20cm. The seasonal δ<^13>C fluctuation of soil respired CO_2 was influenced by CO_2 production at a shallow depth in soil (<10cm). On the other hand, the vertical δ<^13>C profiles in soil organic matter increased ca. 2‰ from 10 to 60cm in depth. This δ<^13>Cenrichment is much larger than the expected value from the isotopic fractionation during decomposition. | |||||
内容記述タイプ | Abstract | |||||
内容記述 | ||||||
内容記述 | タンデトロン加速器質量分析計業績報告 Summaries of Researches Using AMS 2000 (平成12)年度 | |||||
内容記述タイプ | Other | |||||
出版者 | ||||||
出版者 | 名古屋大学年代測定資料研究センター 天然放射性元素測定小委員会 | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.18999/sumrua.12.147 | |||||
ID登録タイプ | JaLC | |||||
関連情報 | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | URI | |||||
関連識別子 | http://ci.nii.ac.jp/naid/110000475686/ | |||||
書誌情報 |
名古屋大学加速器質量分析計業績報告書 巻 12, p. 147-161, 発行日 2001-03 |
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フォーマット | ||||||
application/pdf | ||||||
著者版フラグ | ||||||
値 | publisher |