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AIR EXTRACTION SYSTEMS FOR ICE CORE AND CO_2 AND CH_4 CONCENTRATIONS IN THE PAST ATMOSPHERE
https://doi.org/10.15094/00003716
https://doi.org/10.15094/00003716e5bf5426-804b-437a-9b7f-0c49621d2b35
名前 / ファイル | ライセンス | アクション |
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KJ00002409945 (84.7 kB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1992-02-01 | |||||
タイトル | ||||||
タイトル | AIR EXTRACTION SYSTEMS FOR ICE CORE AND CO_2 AND CH_4 CONCENTRATIONS IN THE PAST ATMOSPHERE | |||||
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 | 10.15094/00003716 | |||||
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 | AIR EXTRACTION SYSTEMS FOR ICE CORE AND CO_2 AND CH_4 CONCENTRATIONS IN THE PAST ATMOSPHERE | |||||
著者名よみ |
ナカザワ, タカキヨ
× ナカザワ, タカキヨ× マチダ, トシノブ× エスミ, ケンジ× タナカ, マサユキ× フジイ, ヨシユキ× アオキ, シュンジ× ワタナベ, オキツグ |
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著者名(英) |
NAKAZAWA, Takakiyo
× NAKAZAWA, Takakiyo× MACHIDA, Toshinobu× ESUMI, Kenji× TANAKA, Masayuki× FUJII, Yoshiyuki× AOKI, Shuhji× WATANABE, Okitsugu |
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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 | ||||||
Center for Atmospheric and Oceanic Studies, Faculty of Science, Tohoku University:(Present address)Japan Weather Association | ||||||
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 | ||||||
National Institute of Polar Research | ||||||
著者所属(英) | ||||||
en | ||||||
National Institute of Polar Research | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Dry and melt extraction systems have been developed to determine respectively the CO_2 and CH_4 concentrations of ancient air trapped in the polar ice core. The day extraction system was confirmed to be capable of crushing a core sample of 1kg to fine powder within 2 min, and its air extraction efficiency was estimated to be 98%. The air for the CH_4 measurements was extracted by melting core samples in an evacuated chamber. The CO_2 and CH_4 concentrations were determined using gas chromatography. The overall precision of our analyses is better than ±1 ppmv for CO_2 and ±10 ppbv for CH_4. Two Antarctic ice cores were used in this study. The ice core drilled at Mizuho Station (70°42'S, 44°20'E) showed that pre-industrial levels of the CO_2 and CH_4 concentrations (3300-200 yrs BP) were 279-287 ppmv and 690-750 ppbv, respectively and both concentrations increased rapidly for the last 200 years. It was also found that the CO_2 concentrations between 800 and 200 yrs BP were higher by almost 7 ppmv than those in remaining pre-industrial time, due probably to CO_2 release from the oceans and/or the biosphere. The Yamato core drilled near the end of ice flow (near the Yamato Mountains) showed concentrations of 230-240 ppmv and 530-580 ppbv for CO_2 and CH_4,respectively, which are apparently lower than post-glacial background levels, implying that the core was formed in the glacial period. | |||||
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 5, p. 178, 発行日 1992-02 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |