Elucidation of nitrous oxide cycles at high-latitudes in the northern hemisphere using a chemistry climate model and isotopes

• Project/Area Number: 19710025
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Environmental dynamic analysis
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: ISHIJIMA Kentaro Japan Agency for Marine-Earth Science and Technology, 地球環境変動領域, ポストドクトラル研究員 (90399494)
• Project Period (FY): 2007 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥3,810,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥510,000); Fiscal Year 2009: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2008: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2007: ¥1,600,000 (Direct Cost: ¥1,600,000)
• Keywords: 一酸化二窒素 / 同位体 / 同位体モデル / 成層圏-対流圏交換 / 季節変動 / 航空機観測 / 成層圏影響 / N2O同位体モデル / N20 / 変動スケール提示

Research Abstract

地表付近における大気中N_2O濃度変動への成層圏の影響をN_2O安定同位体を用いて調べることを目的として、N_2O同位体モデルを開発し、大気球により観測された成層圏におけるN_2O同位体比の高度分布をほぼ再現できるようになった。さらに、新たにモデル中で成層圏N_2Oに印(タグ)を付けて成層圏起源のN_2Oを区別するタグ付き計算法を開発し、航空機観測データと比較することにより対流圏大気中のN_2O濃度の季節変化における成層圏の影響を見積もった。

Research Products

• [Journal Article] N2O behavior between the lower stratosphere and the surface suggested by aircraft observations and model (2009)
  • Author(s): Kentaro Ishijima, Prabir K. Patra, Toshinobu Machida, Hidekazu Matsueda, Yosuke Sawa, Masayuki Takigawa, Takakiyo Nakazawa
  • Journal Title: Fifth International Symposium on Non-CO2 Greenhouse Gases extended abstract
• [Journal Article] Three-dimensional model simulation of atmospheric nitrous oxide isotopes: comparison with balloon-observed profiles and estimation of the stratospheric effect on the surface (2008)
  • Author(s): Kentaro Ishijima, Sakae Toyoda, Masayuki Takigawa, Prabir K. Patra, Takakiyo Nakazawa, Shuji Aoki, Shinji Morimoto, Chisato Yoshikawa, Satoru Arihara, Naohiro Yoshida
  • Journal Title: The 4th International Symposium on Isotopomers extended abstract
• [Presentation] Development of atmospheric N2O isotopomers model based on a chemistry-coupled atmospheric general circulation model (2009)
  • Author(s): Ishijima K., S. Toyoda, K. Sudo, C. Yoshikawa, S. Nanbu, S. Aoki, T. Nakazawa, N. Yoshida
  • Organizer: AGU Fall Meeting
  • Place of Presentation: San Francisco, U.S.A.
  • Year and Date: 2009-12-15
• [Presentation] Temporal variations of the atmospheric nitrous oxide concentration and its δ^<15>N and δ^<18>O for the latter half of the 20th century reconstructed from firn air analyses (2009)
  • Author(s): Ishijima K., S. Sugawara, K. Kawamura, G. Hashida, S. Morimoto, S. Murayama, S. Aoki, T. Nakazawa
  • Organizer: The 2nd international symposium on Dome Fuji ice core and related topics
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 2009-11-18
• [Presentation] Temporal variations of the atmospheric nitrous oxide concentration and its δ^15N and δ^18O for the latter half of the 20th century reconstructed from firn air analyses (2009)
  • Author(s): 石島健太郎
  • Organizer: The 2nd international symposium on Dome Fuji ice core and related topics
  • Place of Presentation: 国立極地研究所(東京都)
  • Year and Date: 2009-11-18
• [Presentation] N2Oアイソトポマー化学輸送モデルの開発 (2009)
  • Author(s): 石島健太郎、豊田栄、吉川知里、須藤健悟、南部伸孝、青木周司、中澤高清、吉田尚弘
  • Organizer: 第15回大気化学討論会
  • Place of Presentation: つくば
  • Year and Date: 2009-10-21
• [Presentation] N2Oアイソトポマー化学輸送モデルの開発 (2009)
  • Author(s): 石島健太郎
  • Organizer: 第15回大気化学討論会
  • Place of Presentation: エポカルつくば(茨城県)
  • Year and Date: 2009-10-20
• [Presentation] Fifth International Symposium on Non-CO2 Greenhouse Gases (2009)
  • Author(s): 石島健太郎
  • Organizer: Fifth International Symposium on Non-CO2 Greenhouse Gases
  • Place of Presentation: Wageningen, Netherlands
  • Year and Date: 2009-07-03
• [Presentation] N2O behavior between the lower stratosphere and the surface suggested by aircraft observation and model (2009)
  • Author(s): Ishijima K., P.K. Patra, M. Takigawa, T. Machida, H. Matsueda, Y. Sawa, T. Nakazawa, S. Aoki
  • Organizer: Fifth International Symposium on Non-CO2 Greenhouse Gases
  • Place of Presentation: Wageningen, Netherlands
  • Year and Date: 2009-07-01
• [Presentation] 地表-上部対流圏における大気中一酸化二窒素濃度の季節変動～航空機観測およびモデル計算結果の解析～ (2009)
  • Author(s): 石島健太郎、Prabir K. Patra、町田敏暢、松枝秀、澤庸介、滝川雅之、中澤高清、青木周司
  • Organizer: 日本気象学会2009年度春季大会
  • Place of Presentation: つくば
  • Year and Date: 2009-05-28
• [Presentation] 地表-上部対流圏における大気中-酸化二窒素濃度の季節変動～航空機観測およびモデル計算結果の解析～ (2009)
  • Author(s): 石島健太郎
  • Organizer: 日本気象学会2009年度春季大会
  • Place of Presentation: エポカルつくば(茨城県)
  • Year and Date: 2009-05-28
• [Presentation] Nitrous oxide seasonal variations between the surface and the upper troposphere (2009)
  • Author(s): 石島健太郎
  • Organizer: 日本地球惑星科学連合2009年大会
  • Place of Presentation: 幕張メッセ(千葉県)
  • Year and Date: 2009-05-20
• [Presentation] Nitrous oxide seasonal variations between the surface and the upper troposphere (2009)
  • Author(s): Kentaro Ishijima, Prabir K. Patra, Toshinobu Machida, Hidekazu Matsueda, Yosuke Sawa, Masayuki Takigawa, Takakiyo Nakazawa, Shuji Aoki
  • Organizer: 日本地球惑星科学連合2009年大会
  • Place of Presentation: 幕張
  • Year and Date: 2009-05-18
• [Presentation] モデル計算による大気中N2O同位体時空間変動の推定 (2008)
  • Author(s): 石島健太郎、豊田栄、滝川雅之、中澤高清、森本真司、吉川知里、在原悟、吉田尚弘
  • Organizer: 第14回大気化学討論会
  • Place of Presentation: 横浜
  • Year and Date: 2008-10-30
• [Presentation] モデル計算による大気中N2O同位体時空間変動の推定 (2008)
  • Author(s): 石島健太郎
  • Organizer: 第14回大気化学討論会
  • Place of Presentation: 横浜、海洋研究開発機構
  • Year and Date: 2008-10-30
• [Presentation] Approaches to three-dimensional simulation of atmospheric nitrous oxide isotopes by a chemistry-coupled atmospheric general circulation model (2008)
  • Author(s): Kentaro Ishijima, Sakae Toyoda, Masayuki Takigawa, Prabir K. Patra, Takakiyo Nakazawa, Shinji Morimoto
  • Organizer: IGAC 10th International Conference
  • Place of Presentation: Annecy, France
  • Year and Date: 2008-09-10
• [Presentation] Approaches to three-dimensional simulation of atmospheric nitrous oxide isotopes by a chemistry-coupled atmospheric general circulation model (2008)
  • Author(s): 石島健太郎
  • Organizer: 10th IGAC 2008
  • Place of Presentation: L'Imperial Palace, Annecy, France
  • Year and Date: 2008-09-10
• [Presentation] Latitudinal patterns of N20 concentration variations over the northern and western Pacific for 1992-2006 (2007)
  • Author(s): 石島 健太郎
  • Organizer: AGU Fall Meeting
  • Place of Presentation: San Francisco,CA,USA.
  • Year and Date: 2007-12-14
• [Presentation] Latitudinal patterns of N2O concentration variations over the northern and western Pacific for 1992-2006 (2007)
  • Author(s): Ishijima K., T. Nakazawa, S. Aoki, P.K. Patra, M. Takigawa
  • Organizer: AGU Fall Meeting
  • Place of Presentation: San Francisco, U.S.A.
  • Year and Date: 2007-12-12
• [Presentation] 大気中N2O濃度への自然土壌・海洋及び人為放出源からのN2O放出の影響:AGCMシミュレーションを用いた考察 (2007)
  • Author(s): 石島健太郎、Patra Prabir、滝川雅之、中澤高清、青木周司、町田敏暢、森本真司
  • Organizer: 日本地球惑星科学連合2007年大会
  • Place of Presentation: 幕張
  • Year and Date: 2007-05-21
• [Presentation] Effect of N20 emission from natural soil and ocean and anthropogenic sources on atmospheric N20 concentration:consideration using ALCM (2007)
  • Author(s): 石島 健太郎
  • Organizer: Japan Geoscience Union Meeting 2007
  • Place of Presentation: 幕張市,幕張メッセ
  • Year and Date: 2007-05-21
• [Presentation] Effect of atmospheric transport on seasonal and interannual variations in the atmospheric nitrous oxide concentration (2007)
  • Author(s): Ishijima K., P.K. Patra, M. Takigawa, K. Miyazaki, T. Nakazawa, T. Machida, S. Morimoto
  • Organizer: EGU General Assembly Meeting 2007
  • Place of Presentation: Vienna, Austria
  • Year and Date: 2007-04-19
• [Presentation] Effect of atmospheric transport on seasonal and interannua variations in the atmospheric nitrous oxide concentration (2007)
  • Author(s): 石島 健太郎
  • Organizer: EGU General Assembly Meeting 2007
  • Place of Presentation: Vienna,Austria
  • Year and Date: 2007-04-19