Study on the production and consumption processes of trace NO by stable isotope ratio analysis

• Project/Area Number: 22540497
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Geochemistry/Astrochemistry
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: TOYODA Sakae 東京工業大学, 大学院・総合理工学研究科, 准教授 (30313357)
• Research Collaborator: YAMADA Keita 東京工業大学, 大学院・総合理工学研究科, 准教授 (70323780) ; YOSHIDA Naohiro 東京工業大学, 大学院・総合理工学研究科, 教授 (60174942) ; 下島 涼介 東京工業大学, 大学院・総合理工学研究科, 修士課程学生
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2010: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 大気圏 / 水圏化学 安定同位体 / 一酸化窒素 / 安定同位体比 / 微量分析法

Research Abstract

Nitric oxide (NO) is produced by microbiological activities and burning of fuels.It is one of the important trace gasses involved in tropospheric ozone production and nitrogen deposition. Because nitrogen and oxygen isotopes ratios in NO can be effective tools to differentiate the reaction pathways related to NO, this study aimed to develop a simple, rapid, and high-sensitive analytical method for nitrogen and oxygen isotope ratios in NO. Simulation experiments of biomass burning were conducted using grass and wood samples. Based on concentration and isotope ratios in N2O, production and consumption processes of NO were discussed.

Research Products

• [Journal Article] Characterization and production and consumption processes of N O emitted from temperate agricultural soils determined viaisotopomer ratio analysis (2012)
  • Author(s): Toyoda, S., M. Yano, S. Nishimura, H. Akiyama,A. Hayakawa, K.Koba, S. Sudo, K. Yagi,A.Makabe, Y.Tobari, N. O. Ogawa, N.Ohkouchi,K. Yamada, and N. Yoshida
  • Journal Title: Global Biogeochem. Cycles Volume: 25 Issue: 2 Pages: n/a-n/a
  • DOI: 10.1029/2009gb003769
  • Peer Reviewed
• [Presentation] Decadal time series of tropospheric N2O isotopomer ratios in the northern hemisphere obtained by the long-term observation at Hateruma island, Japan (2012)
  • Author(s): S. Toyoda, N. Kuroki, N. Yoshida, K. Ishijima, Y. Tohjima, and T. Machida
  • Organizer: Sixth International Symposium on Isotopomers
  • Place of Presentation: Washington DC, USA
• [Presentation] バイオマス燃焼で発生するNOのアイソトポマー比 (2011)
  • Author(s): 豊田栄、下島涼介、山田桂太、吉田尚弘
  • Organizer: 日本地球化学会第58回年会
  • Place of Presentation: 北海道大学(北海道)
• [Presentation] バイオマス燃焼で発生するN2Oのアイソトポマー比 (2011)
  • Author(s): 豊田栄、下島涼介、山田桂太、吉田尚弘
  • Organizer: 日本地球化学会第58回年会
  • Place of Presentation: 北海道大学(北海道)
• [Remarks]
  • URL: http://nylab.chemenv.titech.ac.jp/~stoyoda/index.html