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VARIATIONS OF CARBON ISOTOPIC RATIO OF ATMOSPHERIC CARBON DIOXIDE OVER JAPAN
https://doi.org/10.15094/00003752
https://doi.org/10.15094/0000375256a274da-cd55-4c8a-aa0b-63f7efe337de
名前 / ファイル | ライセンス | アクション |
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KJ00000767906 (68.6 kB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1992-12-01 | |||||
タイトル | ||||||
タイトル | VARIATIONS OF CARBON ISOTOPIC RATIO OF ATMOSPHERIC CARBON DIOXIDE OVER JAPAN | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.15094/00003752 | |||||
ID登録タイプ | JaLC | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
記事種別(英) | ||||||
en | ||||||
ABSTRACT | ||||||
論文名よみ | ||||||
その他のタイトル | VARIATIONS OF CARBON ISOTOPIC RATIO OF ATMOSPHERIC CARBON DIOXIDE OVER JAPAN | |||||
著者名よみ |
ナカザワ, タカキヨ
× ナカザワ, タカキヨ× モリモト, シンジ× アオキ, シュンジ× タナカ, マサユキ |
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著者名(英) |
NAKAZAWA, Takakiyo
× NAKAZAWA, Takakiyo× MORIMOTO, Shinji× AOKI, Shuhji× TANAKA, Masayuki |
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著者所属(英) | ||||||
en | ||||||
Center for Atmospheric and Oceanic Studies, Faculty of Science, Tohoku University | ||||||
著者所属(英) | ||||||
en | ||||||
Center for Atmospheric and Oceanic Studies, Faculty of Science, Tohoku University | ||||||
著者所属(英) | ||||||
en | ||||||
National Institute of Polar Research | ||||||
著者所属(英) | ||||||
en | ||||||
Center for Atmospheric and Oceanic Studies, Faculty of Science, Tohoku University | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Carbon dioxide samples collected in the troposphere over Japan during the periods from April 1984 to November 1990 were analyzed for the carbon isotope ratio, δ^<13>C, with a precision of 0.03‰ (one standard deviation). The seasonal cycle of δ^<13>C decreased with increasing height, with a phase delay of about one month between the lower and upper troposphere, which was quite similar to that of the CO_2 concentration. It was found from the observed seasonal cycles of the CO_2 concentration and δ^<13>C that the rate of change in δ^<13>C with respect to the CO_2 concentration is about -0.05‰ per ppmv. This implies that the seasonal CO_2 cycle over Japan is mainly induced by seasonally dependent biospheric activities. However, the air transport from different latitudes is also important for the seasonal CO_2 cycle, especially in the upper troposphere. δ^<13>C decreased secularly at an average rate of about -0.03‰ per year due mainly to combustion of fossil fuels with lighter CO_2 relative to the atmospheric CO_2. Irregular variations of δ^<13>C with the periods of two or three years, superimposed on the secular trend, were also observed; they were almost in phase with these of the CO_2 concentration. From the comparison of both irregular variations, it was found that the cause could primarily attributed to the imbalance in CO_2 exchange between the atmosphere and biosphere in association with climate change, rather than between the atmosphere and oceans. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA10756213 | |||||
書誌情報 |
Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology 巻 6, p. 148, 発行日 1992-12 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |