Investigation of paleo-nitrogen cycle
Project/Area Number |
22244071
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Research Category |
Grant-in-Aid for Scientific Research (A)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Geochemistry/Astrochemistry
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Research Institution | Japan Agency for Marine-Earth Science and Technology |
Principal Investigator |
OHKOUCHI Naohiko 独立行政法人海洋研究開発機構, 海洋・極限環境生物圏領域, プログラムディレクター (00281832)
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Co-Investigator(Kenkyū-buntansha) |
YAMADA Keita 東京工業大学, 大学院総合理工研究科, 准教授 (70323780)
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Project Period (FY) |
2010-04-01 – 2013-03-31
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Project Status |
Completed (Fiscal Year 2013)
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Budget Amount *help |
¥46,020,000 (Direct Cost: ¥35,400,000、Indirect Cost: ¥10,620,000)
Fiscal Year 2012: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
Fiscal Year 2011: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Fiscal Year 2010: ¥31,330,000 (Direct Cost: ¥24,100,000、Indirect Cost: ¥7,230,000)
|
Keywords | 窒素同位体比 / 物質循環 / 窒素サイクル |
Research Abstract |
In this study, we first apply nitrogen stable isotopic compositions of chlorophylls and their derivatives from the sediment cores collected from several sites including Japan Sea, off Namibia, and Adelie drift in the Antactica. Off Namibia, the nitrogen isotopic record suggested the existence of strong upwelling throughout the last 2.5 million years. These chlorophyll isotope records are not necessarily consistent with the bulk isotopic record of sedimentary nitrogen applied for long. I concluded that nitrogen isotopic signature from the primary producers should be measured for the precise, rigorous reconstuction of paleo nitrogen cycle in the ocean.
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Report
(4 results)
Research Products
(31 results)
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[Journal Article] Direct evidence for the alternation of 13C natural abundances during early diagenesis in Lake Kasumigaura2011
Author(s)
A. Kohzu, A. Imai, N. Ohkouchi, T. Fukushima, K. Kamiya, K. Komatsu, N. Tomioka, N. Kawasaki, S. Miura, and T. Satou
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Journal Title
Japan. Geochemistry Geophysics Geosystems
Volume: 12,10
Issue: 10
Pages: 1-14
DOI
Related Report
Peer Reviewed
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[Journal Article] Chlorin specific carbon and nitrogen isotopes track aquatic change over the last deglaciation in Lake Suigetsu, Japan2010
Author(s)
Tyler, J., Y.Kashiyama, N.Ohkouchi, N.Ogawa, Y.Yokoyama, Y.Chikaraishi, R.A.Staff, M.Ikehara, C.Bronk Ramsey, C.Bryant, F.Brock, K.Gotanda, T.Haraguchi, H.Yonenobu, T.Nakagawa
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Journal Title
Geochemistry, Geophysics, Geosystems
Volume: 11
Issue: 9
DOI
Related Report
Peer Reviewed
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[Presentation] A novel approach for studying marine nutrient cycling : application in the Adélie Basin (East Antarctica) for the last 2,000 years BP2013
Author(s)
Etourneau J, Ogawa NO, Suga H, Campagne P, Djouraev I, Bouloubassi I, Massé G, Crosta X, Ohkouchi N
Organizer
International Conference on Paleoceanography
Place of Presentation
Barcelona-Sitges, Spain
Year and Date
2013-09-01
Related Report
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[Presentation] 地球生物学入門2011
Author(s)
大河内直彦
Organizer
地球惑星科学連合大会スペシャルレクチャー
Place of Presentation
千葉県,幕張メッセ国際会議場
Year and Date
2011-05-24
Related Report
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[Presentation] 地球生物学入門2011
Author(s)
大河内直彦
Organizer
地球惑星科学連合大会
Place of Presentation
幕張メッセ(招待講演)
Year and Date
2011-05-24
Related Report
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