| Project/Area Number |
24510024
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | National Institute for Environmental Studies |
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Principal Investigator |
KOHZU Ayato 独立行政法人国立環境研究所, 地域環境研究センター, 主任研究員 (30514327)
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| Co-Investigator(Kenkyū-buntansha) |
IMAI Akio 独立行政法人国立環境研究所, 地域環境研究センター, センター長 (40203286)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2014: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2012: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
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| Keywords | 溶存無機炭素 / 土壌呼吸 / 大気平衡 / 底泥 / メタン生成 / 炭素循環 / 放射性炭素濃度 / 炭素安定同位体比 / 放射線炭素濃度 / 起源解析 |
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| Outline of Final Research Achievements |
Dissolved inorganic carbon (DIC) in a stream is derived from the soil respiratory CO2 gas in the basin. So, we succeeded to obtain information about the loaded decomposable organic matter from the basin by using a plot of δ13C vs. concentration of DIC. Most of all the δ13C values of H2CO3* were distributed from -26‰ to -22‰ that were close to the δ13C values of the soil respiratory CO2. In several streams, we were able to observe the effect of photosynthesis and atmospheric equilibrium on DIC pool. Meanwhile, we found that δ13C values of DIC in pore water of lake sediment can be a index of methane production within a sediment.
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