Global budget analysis of nitrous oxide based on top-down approach using a chemistry trasnport model

• Project/Area Number: 23710034
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Environmental dynamic analysis
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: ISHIJIMA Kentaro 独立行政法人海洋研究開発機構, 地球表層物質循環研究分野, 研究員 (90399494)
• Project Period (FY): 2011-04-28 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2011: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 一酸化二窒素 / トップダウン / 放出量 / 推定 / 逆計算 / モデル / 観測 / N2O同位体モデル開発 / 最適化手法開発 / 放出源の推定 / 全球収支 / 逆解析 / 先験値 / マルチエミッション計算 / N2O / TransCom-N2O

Outline of Final Research Achievements

We have developed a chemistry transport model to simulate atmospheric nitrous oxide (N2O) by incorporating photochemical reactions for N2O and ozone in an atmospheric general circulation model. This model showed nice performance compared to other models in an intercomparison of atmospheric N2O models (TransCom-N2O), and thereby it was expected that inverse modeling by the model could be also reliable. We estimated seasonal variations of regional N2O emissions by inverse modeling, and the temporal tendencies were different from the prior emissions, indicating that agricultural fertilization and/or thaw could be a cause for them, and necessity to improve precision of the N2O inverse modeling by expansion of N2O observation network. In addition to such modeling, we also made a new observation data set of atmospheric N2O, which resulted in contributing to N2O inverse modeling studies.

Research Products

• [Journal Article] TransCom N2O model inter-comparison - Part 1: Assessing the influence of transport and surface fluxes on tropospheric N2O variability (2014)
  • Author(s): R. L. Thompson, P. K. Patra, K. Ishijima, E. Saikawa, M. Corazza, U. Karstens, C. Wilson, P. Bergamaschi, E. Dlugokencky, C. Sweeney, R. G. Prinn, R. F. Weiss, S. O’Doherty, P. J. Fraser, L. P. Steele, P. B. Krummel, M. Saunois, M. Chipperfield, and P. Bousquet
  • Journal Title: Atmos. Chem. Phys. Volume: 14 Issue: 8 Pages: 4349-4368
  • DOI: 10.5194/acp-14-4349-2014
  • Peer Reviewed / Open Access
• [Journal Article] Global and regional emissions estimates for N2O (2014)
  • Author(s): E. Saikawa, R. G. Prinn, E. Dlugokencky, K. Ishijima, G. S. Dutton, B. D. Hall, R. Langenfelds, Y. Tohjima, T. Machida, M. Manizza, M. Rigby, S. O’Doherty, P. K. Patra, C. M. Harth, R. F. Weiss, P. B. Krummel, M. van der Schoot, P. J. Fraser, L. P. Steele, S. Aoki, T. Nakazawa, and J. W. Elkins
  • Journal Title: Atmos. Chem. Phys. Volume: 14 Issue: 9 Pages: 4617-4641
  • DOI: 10.5194/acp-14-4617-2014
  • Peer Reviewed / Open Access
• [Journal Article] TransCom N2O model inter-comparison - Part 2: Atmospheric inversion estimates of N2O emissions (2014)
  • Author(s): R. L. Thompson, K. Ishijima, E. Saikawa, M. Corazza, U. Karstens, P. K. Patra, P. Bergamaschi, F. Chevallier, E. Dlugokencky, R. G. Prinn, R. F. Weiss, S. O’Doherty, P. J. Fraser, L. P. Steele, P. B. Krummel, A. Vermeulen, Y. Tohjima, A. Jordan, L. Haszpra, M. Steinbacher et al.
  • Journal Title: Atmos. Chem. Phys. Volume: 14 Issue: 12 Pages: 6177-6194
  • DOI: 10.5194/acp-14-6177-2014
  • Peer Reviewed / Open Access
• [Journal Article] TransCom N2O model inter-comparison Part II: Atmospheric inversion estimates of N2O emissions (2014)
  • Author(s): Thompson, R. L., Ishijima, K., Saikawa, E., Corazza, M., Karstens, U., Patra, P. K., Bergamaschi, P., Chevallier, F., Dlugokencky, E., Prinn, R. G., Weiss, R. F., O'Doherty, S., Fraser, P. J., Steele, L. P., Krummel, P. B., Vermeulen, A., Tohjima, Y., Jordan, A., Haszpra, L., Steinbacher, M., Van der Laan, S. 他
  • Journal Title: Atmos. Chem. Phys. Discuss. Volume: 14 Pages: 5271-5321
  • DOI: 10.5194/acpd-14-5271-2014
  • Peer Reviewed
• [Journal Article] Nitrous oxide emissions 1999 to 2009 from a global atmospheric inversion (2014)
  • Author(s): R. L. Thompson, F. Chevallier, A. M. Crotwell, G. Dutton, R. L. Langenfelds, R. G. Prinn, R. F. Weiss, Y. Tohjima, T. Nakazawa, P. B. Krummel, L. P. Steele, P. Fraser, S. O'Doherty, K. Ishijima, and S. Aoki
  • Journal Title: Atmos. Chem. Phys. Volume: 14 Issue: 4 Pages: 1801-1817
  • DOI: 10.5194/acp-14-1801-2014
  • Peer Reviewed
• [Journal Article] Global and regional emissions estimates for N2O (2013)
  • Author(s): E. Saikawa, R. G. Prinn, E. Dlugokencky, K. Ishijima, G. S. Dutton, B. D. Hall, R. Langenfelds, Y. Tohjima, T. Machida, M. Manizza, M. Rigby, S. O’Doherty, P. K. Patra, C. M. Harth, R. F. Weiss, P. B. Krummel, M. van der Schoot, P. J. Fraser, L. P. Steele, S. Aoki, T. Nakazawa, and J. W. Elkins
  • Journal Title: Atmos. Chem. Phys. Discuss. Volume: 13 Pages: 19471-19525
  • DOI: 10.5194/acpd-13-19471-2013
  • Peer Reviewed
• [Presentation] Atmospheric N2O isotope simulation: Model optimization, comparison with observation and source implication (2014)
  • Author(s): Kentaro Ishijima, Sakae Toyoda, Masayuki Takigawa, Kengo Sudo, Takakiyo Nakazawa, Shuji Aoki, Shinji Morimoto, Satoshi Sugawara Thomas Rockmann, Jan Kaiser, Naohiro Yoshida
  • Organizer: The 7th International Symposium on Isotopomers
  • Place of Presentation: オランダ、アムステルダム
  • Year and Date: 2014-11-05 – 2014-11-07
• [Presentation] Simulation of nitrous oxide in the troposphere and stratosphere (2012)
  • Author(s): 石島健太郎
  • Organizer: IGAC/SPARC Global Chemistry-Climate Modeling and Evaluation Workshop
  • Place of Presentation: スイス、ダボス
• [Presentation] インバースモデリングによる地域別N2Oフラックス季節変動の推定 (2012)
  • Author(s): 石島健太郎
  • Organizer: 日本気象学会 2012年度春季大会
  • Place of Presentation: つくば市
• [Presentation] Longterm simulation of tropospheric and stratospheric N2O isotopomers and its application to global budget estimations (2012)
  • Author(s): 石島健太郎
  • Organizer: The Sixth International Symposium on Isotopomers (ISI-2012)
  • Place of Presentation: 米国、ワシントン市
• [Presentation] 大気中一酸化二窒素の全球モデリング (2012)
  • Author(s): 石島健太郎
  • Organizer: 2012年 日本地球化学会年会
  • Place of Presentation: 福岡市
  • Invited
• [Presentation] マルチエミッション計算を用いたN2Oフラックス先験値の最適化 (2012)
  • Author(s): 石島健太郎
  • Organizer: 2012年 気象学会秋季大会
  • Place of Presentation: 札幌市
• [Presentation] マルチエミッション計算の全球N2Oフラックス推定への応用 (2012)
  • Author(s): 石島健太郎
  • Organizer: 第18回 大気化学討論会
  • Place of Presentation: 福岡市
• [Presentation] Seasonal variability of regional N2O flux estimated by inverse modeling (2011)
  • Author(s): Kentaro Ishijima, Prabir K. Patra, Rona L. Thompson and TransCom-N2O members
  • Organizer: NCGG-6
  • Place of Presentation: Casa 400, Amsterdam, Netherland
• [Presentation] 北・西太平洋上における一酸化二窒素濃度の変動 (2011)
  • Author(s): 石島健太郎、Patra K. Prabir、中澤高清、青木周司 、遠嶋康徳、伊藤昭彦
  • Organizer: 第17回大気化学討論会
  • Place of Presentation: 京都大学宇治キャンパス（京都府）
• [Presentation] 大気中一酸化二窒素同位体の全球モデリング
  • Author(s): 石島健太郎
  • Organizer: 2013年度日本地球化学会年会
  • Place of Presentation: 筑波大学、茨城県