| Project/Area Number |
22310003
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
AOKI Shuji 東北大学, 大学院・理学研究科, 教授 (00183129)
MORIMOTO Shinji 国立極地研究所, 研究教育系, 准教授 (30270424)
KAWAMURA Kenji 国立極地研究所, 研究教育系, 准教授 (90431478)
UMEZAWA Taku 東北大学, 大学院・理学研究科, 特別教育研 (00570508)
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| Project Period (FY) |
2010 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥18,330,000 (Direct Cost: ¥14,100,000、Indirect Cost: ¥4,230,000)
Fiscal Year 2012: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2011: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2010: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
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| Keywords | メタン / 氷床コア / 氷期 / 間氷期 / 物質循環 / 濃度 / 同位体比 / 循環 / 大気輸送モデル |
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| Research Abstract |
Temporal variations of atmospheric CH_4 concentration over the last 130 kyrs were reconstructed from deep ice cores drilled at Dome Fuji, Antarctica and NGRIP and NEEM, Greenland. By analyzing the reconstructed differences of CH_4 concentration between north and south polar regions using an atmospheric model, spatiotemporal variations of CH_4 emissions from natural sources were closely examined. The values ofδ^<13>C andδD of atmospheric CH_4 were also reconstructed using the Dome Fuji deep ice core. Based on their temporal variations, causes of glacial/interglacial variations in atmospheric CH_4 were discussed especially in terms of changes in CH_4 emissions from natural sources.
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