2013 Fiscal Year Final Research Report
Quantifying nitrate dynamics in lakes using the triple oxygen isotopes as tracers
| Project/Area Number |
24651002
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Nagoya University |
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Principal Investigator |
TSUNOGAI Urumu 名古屋大学, 環境学研究科, 教授 (50313367)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | 湖沼 / 硝酸 / 三酸素同位体組成 / 大気沈着 / 硝化 / 同化 / 物質循環速度 |
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| Research Abstract |
The stable isotopic compositions of nitrate, including the triple oxygen isotopes, were determined twice in 1 year in several oligotrophic and mesotrophic lakes in Japan. These data were then used to quantify the geochemical dynamics of nitrate in each lake, by using the deposition rate of the atmospheric nitrate onto each lake. The new method using the triple oxygen isotopes of nitrate has overcome the problems inherent in the conventional incubation methods to quantify the geochemical dynamics of nitrate in lake water columns, such as gross nitrate uptake rates and gross nitrification rates in lakes.
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Research Products
(14 results)
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[Journal Article] Quantifying the effects of clear-cutting and strip-cutting on nitrate dynamics in a forested watershed using triple oxygen isotopes as tracers2014
Author(s)
Tsunogai, U., Komatsu, D. D., Ohyama, T., Suzuki, A., Nakagawa, F., Noguchi, I., Takagi, K., Nomura, M., Fukuzawa, K., and Shibata, H.
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Journal Title
Biogeosciences Discuss
Volume: 11
Pages: 7413-7450
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[Presentation] Quantifying nitrate dynamics in hydrosphere using the triple oxygen isotopes as tracers (Abstract ID : 9630)2012
Author(s)
Tsunogai, U., Tadenuma, Y., Ohyama, T., Komatsu, D. D., Nakagawa, F., Umeda, M., and Tanaka, A.
Organizer
2012 ASLO Aquatic Sciences Meeting
Place of Presentation
Lake Biwa, Otsu, Shiga, Japan
Year and Date
20120708-13
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[Presentation] Tracing the source and fate of nitrate in groundwater using ^<15>N, ^<17>O and ^<18>O (Abstract ID : 9949)2012
Author(s)
Ohyama, T., Nakagawa, F., Komatsu, D. D., Tsunogai, U., Kido, M., and Mizoguchi, T.
Organizer
2012 ASLO Aquatic Sciences Meeting
Place of Presentation
Lake Biwa, Otsu, Shiga, Japan
Year and Date
20120708-13
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[Presentation] Quantifying gross primary production in oligotrophic lakes by using the triple oxygen isotopes of DO as tracers (Abstract ID : 10258)2012
Author(s)
Sakuma, H., Minami, S., Komatsu, D., Nakagawa, F., and Tsunogai, U.
Organizer
2012 ASLO Aquatic Sciences Meeting
Place of Presentation
Lake Biwa, Otsu, Shiga, Japan
Year and Date
20120708-13
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