Investigation of paleo-nitrogen cycle

2013 Fiscal Year Final Research Report

• Project/Area Number: 22244071
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Geochemistry/Astrochemistry
• 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)
• 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)
• Project Period (FY): 2010-04-01 – 2013-03-31
• Keywords: 窒素同位体比

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.

Research Products

• [Journal Article] Organic nitrogen : Sources, fates and chemistry (2013)
  • Author(s): Ohkouchi N and Takano Y
  • Journal Title: Treatise in Geochemistry, 2^<nd> ed Volume: (in press)
  • Peer Reviewed
• [Journal Article] Direct evidence for carbon isotope discrimination during sedimentation and diagenesis in Lake Kasumigaura (2012)
  • Author(s): Kohzu A, Imai A, Ohkouchi N, Fukushima T, Matsushige K, Komatsu K, Kawasaki N, Miura S, Sato T
  • Journal Title: Geochemistry, Geophysics, Geosystems Volume: 12
  • DOI: 10.1029/2011GC003532
  • Peer Reviewed
• [Journal Article] Seasonal variations of nitrogen isotopic composition in Okinotori coral in the tropical Western Pacific; A new proxy for marine nitrate dynamics (2011)
  • Author(s): Yamazaki A, Watanabe T, Ogawa NO, Ohkouchi N, Shirai K, Toratani M, Uematsu M
  • Journal Title: Journal of Geophysical Research–Biogeosciences Volume: 116 Pages: G04005
  • DOI: 10.1029/2011JG001697
  • Peer Reviewed
• [Journal Article] New organic reference materials for carbon- and nitrogen-stable isotope ratio measurements provided by Center for Ecological Research, Kyoto University, and Institute of Biogeosciences, Japan Agency for Marine-Earth Science and Technology (2011)
  • Author(s): Tayasu I, Hirasawa R, Ogawa NO, Ohkouchi N, Yamada K
  • Journal Title: Limnology
  • DOI: 10.1007/s10201-011-0345-5
  • Peer Reviewed
• [Journal Article] 白亜紀における大規模火山活動と地球環境変動のリンク (2010)
  • Author(s): 黒田潤一郎,鈴木勝彦,大河内直彦
  • Journal Title: 地学雑誌 Volume: 119 Pages: 534-555
  • Peer Reviewed
• [Journal Article] Nitrogen and carbon isotopic compositions of copper, nickel, and vanadyl porphyrins in Cretaceous OAE black shales. in Earth, Life, and Isotopes (Eds. Ohkouchi N, Tayasu I, Koba K) (2010)
  • Author(s): Kashiyama Y, Ogawa NO, Kitazato H, Ohkouchi N
  • Journal Title: Kyoto University Press Pages: 313-335
  • Peer Reviewed
• [Journal Article] Instrument optimization for compound-specific nitrogen isotope analysis of amino acids by gas chmatography/ combustion/ isotope ratio mass spectrometry. in Earth, Life, and Isotopes (Eds. Ohkouchi N, Tayasu I, Koba K) (2010)
  • Author(s): Chikaraishi Y, Takano Y, Ogawa NO, Ohkouchi N
  • Journal Title: Kyoto University Press Pages: 367-386
  • Peer Reviewed
• [Journal Article] Isolation and desaltation with ion-exchange chromatography for compound-specific nitrogen isotope analysis of amino acids (2010)
  • Author(s): Takano Y, Kashiyama Y, Ogawa NO, Chikaraishi Y, Ohkouchi N
  • Journal Title: Rapid Communications in Mass Spectrometry Volume: 24 Pages: 2317-2323
  • Peer Reviewed
• [Journal Article] Tracking aquatic change using chlorin-specific carbon and nitrogen isotopes : The last glacial-interglacial transition at Lake Suigetsu, Japan (2010)
  • Author(s): Tyler J, Kashiyama Y, Ogawa NO, Yokoyama Y, Ikehara M, Nakagawa T, Ohkouchi N
  • Journal Title: Geochemistry Geophysics Geosystems Volume: 11 Pages: Q09010
  • DOI: 10.1029/2010GC003186
  • Peer Reviewed
• [Presentation] A novel approach for studying marine nutrient cycling : application in the Adélie Basin (East Antarctica) for the last 2,000 years BP (2013)
  • 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
• [Presentation] Plio-Pleistocene evolution of nutrient cycling in the Benguela upwelling system : a chlorin-specificδ^<15>N approach (2013)
  • Author(s): Leduc G, Suga H, Ogawa N, Etourneau J, Schneider R, Ohkouchi N
  • Organizer: International Conference on Paleoceanography
  • Place of Presentation: Barcelona-Sitges, Spain
  • Year and Date: 2013-09-01
• [Presentation] クロロフィルとポルフィリン (2012)
  • Author(s): 大河内直彦
  • Organizer: 日本地球化学会
  • Place of Presentation: 九州大学,福岡県
  • Year and Date: 2012-09-17
  • Invited
• [Presentation] Fate of atmospheric nitrate and nitrogen biogeochemical processes in Lake Biwa elucidated by multiple oxygen isotopes (2012)
  • Author(s): Makabe A, Koba K, Yoshimizu C, Tayasu I, Ogawa NO, Ohkouchi N, Toyoda S, Yoshida N, Nagata T
  • Organizer: ASLO
  • Place of Presentation: 滋賀県, 滋賀県立びわ湖ホール
  • Year and Date: 2012-07-10
• [Presentation] What nitrogenous geomolecules tell about Earth's history? (2012)
  • Author(s): Ohkouchi N
  • Organizer: 地球惑星連合大会
  • Place of Presentation: 千葉県,幕張メッセ国際会議場
  • Year and Date: 2012-05-24
• [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
• [Presentation] Nitrogen isotopic compositions of sedimentary chlorophylls and porphyrins for reconstructing paleo nitrogen cycle (2010)
  • Author(s): Ohkouchi N
  • Organizer: International Conference on Paleoceanography
  • Place of Presentation: La Jolla, USA
  • Year and Date: 2010-08-30
  • Invited
• [Presentation] Stable isotopic compositions of chlorophylls as tools for tracing natural processes (2010)
  • Author(s): Ohkouchi N, Ogawa NO, Chikaraishi Y, Suga H, Kashiyama Y
  • Organizer: Sixth International Workshop on Supramolecular Nanoscience of Chemically Programmed Pigments
  • Place of Presentation: 京都府, 立命館大学
  • Year and Date: 2010-06-10
  • Invited
• [Book] 「地球のからくり」の謎に迫る (2012)
  • Author(s): 大河内直彦
  • Total Pages: 237
  • Publisher: 新潮新書
• [Book] Earth, Life, and Isotopes (2010)
  • Author(s): Ohkouchi N, Tayasu I, Koba K (eds.)
  • Total Pages: 415
  • Publisher: Kyoto University Press
• [Remarks]
  • URL: http://www.jamstec.go.jp/biogeos/j/elhrp/biogeochem/takarabako.html