Study of covariability processes between the atmosphere and surface ocean using a coupled atmosphere-ocean data assimilation system

• Project/Area Number: 25400474
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Meteorology/Physical oceanography/Hydrology
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: KOMORI Nobumasa 国立研究開発法人海洋研究開発機構, アプリケーションラボ, 主任技術研究員 (80359223)
• Co-Investigator(Renkei-kenkyūsha): ENOMOTO Takeshi 京都大学, 防災研究所, 准教授 (10358765) ; MIYOSHI Takemasa 国立研究開発法人理化学研究所, 計算科学研究機構, チームリーダー (90646209) ; YOSHIDA Akira (KUWANO Akira) 国立研究開発法人海洋研究開発機構, アプリケーションラボ, 研究員 (90392969) ; YAMAZAKI Akira 国立研究開発法人海洋研究開発機構, アプリケーションラボ, 研究員 (20633887)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 海洋物理・陸水学 / 気象学 / 大気海洋相互作用 / データ同化

Outline of Final Research Achievements

We have constructed a system to assimilate atmospheric observational data into a global coupled atmosphere-ocean model using a ensemble-based method, and conducted two-months of experimental reanalysis. Effects of atmosphere-ocean interaction, such as lead-lag relationship between SST and precipitation, are well reflected in the reanalysis. In addition, the basin-scale structure of surface atmospheric variables over the tropical Pacific is reconstructed from the ensemble correlation in the CGCM-based system but not in the AGCM-based system.
We also derived some basic equations for temporal development of ensemble mean and spread, and got interesting knowledge helpful to interpret the results.

Research Products

• [Journal Article] 全球大気海洋結合モデルを用いた実験的アンサンブル大気再解析 (2017)
  • Author(s): 小守 信正, 榎本 剛, 三好 建正, 山崎 哲, 吉田 聡, 田口 文明
  • Journal Title: 月刊 海洋 Volume: 号外 No.59 Pages: 93-97
  • Acknowledgement Compliant
• [Journal Article] Using Observations near the Poles in the AFES-LETKF Data Assimilation System (2017)
  • Author(s): Yamazaki, A., T. Enomoto, T. Miyoshi, A. Kuwano-Yoshida, and N. Komori
  • Journal Title: SOLA Volume: 13 Issue: 0 Pages: 41-46
  • DOI: 10.2151/sola.2017-008
  • NAID: 130006895313
  • ISSN: 1349-6476
  • Peer Reviewed / Open Access
• [Journal Article] Observing-system research and ensemble data assimilation at JAMSTEC (2013)
  • Author(s): Enomoto, T., T. Miyoshi, Q. Moteki, J. Inoue, M. Hattori, A. Kuwano-Yoshida, N. Komori, S. Yamane
  • Journal Title: Data Assimilation for Atmospheric, Oceanic and Hydrologic Applications Volume: II Pages: 509-526
  • DOI: 10.1007/978-3-642-35088-7_21
  • ISBN: 9783642350870, 9783642350887
  • Peer Reviewed
• [Presentation] Implementing the ensemble forecast sensitivity to observations (EFSO) method with the AFES-LETKF data assimilation system (2017)
  • Author(s): Akira Yamazaki, Takemasa Miyoshi, Nobumasa Komori
  • Organizer: 3rd RIKEN International Symposium on Data Assimilation
  • Place of Presentation: 理化学研究所 計算科学研究機構（兵庫県神戸市）
  • Year and Date: 2017-02-28
  • Int'l Joint Research
• [Presentation] Ensemble-based experimental atmospheric analysis using a global coupled atmosphere-ocean GCM (2017)
  • Author(s): Nobumasa Komori, Takeshi Enomoto, Takemasa Miyoshi, Akira Yamazaki, Akira Kuwano-Yoshida, Bunmei Taguchi
  • Organizer: Symposium on Past, Present, Future of Predicting Ocean and Climate Variability
  • Place of Presentation: 東京大学 山上会館（東京都文京区）
  • Year and Date: 2017-01-26
  • Int'l Joint Research
• [Presentation] Ensemble-based experimental atmospheric analysis using a global coupled atmosphere-ocean GCM (2016)
  • Author(s): Nobumasa Komori, Takeshi Enomoto, Takemasa Miyoshi, Akira Yamazaki, Akira Kuwano-Yoshida, Bunmei Taguchi
  • Organizer: CLIVAR (Climate and Ocean: Variability, Predictability, and Change) 2016 Open Science Conference
  • Place of Presentation: Qingdao（中国）
  • Year and Date: 2016-09-20
  • Int'l Joint Research
• [Presentation] 全球大気海洋結合モデルを用いた実験的アンサンブル大気再解析 (2016)
  • Author(s): 小守 信正, 榎本 剛, 三好 建正, 山崎 哲, 吉田 聡, 田口 文明
  • Organizer: 第20回データ同化夏の学校
  • Place of Presentation: プラザホテルむつ（青森県むつ市）
  • Year and Date: 2016-08-25
• [Presentation] Arctic OSE studies by using the AFES-LETKF data assimilation system (2016)
  • Author(s): Akira Yamazaki, Jun Inoue, Takeshi Enomoto, Takemasa Miyoshi, Nobumasa Komori
  • Organizer: 5th International Symposium on Data Assimilation
  • Place of Presentation: Reading（英国）
  • Year and Date: 2016-07-20
  • Int'l Joint Research
• [Presentation] Ensemble-based experimental atmospheric analysis using a global coupled atmosphere-ocean GCM (2016)
  • Author(s): Nobumasa Komori, Takeshi Enomoto, Takemasa Miyoshi, Akira Yamazaki, Akira Kuwano-Yoshida, Bunmei Taguchi
  • Organizer: 5th International Symposium on Data Assimilation
  • Place of Presentation: Reading（英国）
  • Year and Date: 2016-07-18
  • Int'l Joint Research
• [Presentation] Ensemble-based experimental atmospheric reanalysis using a global coupled atmosphere-ocean GCM (2016)
  • Author(s): Nobumasa Komori, Takeshi Enomoto, Takemasa Miyoshi, Akira Yamazaki, Akira Kuwano-Yoshida, Bunmei Taguchi
  • Organizer: 2016 Ocean Sciences Meeting
  • Place of Presentation: ニューオーリンズ（米国）
  • Year and Date: 2016-02-22
  • Int'l Joint Research
• [Presentation] 全球大気海洋結合モデルを用いたアンサンブルデータ同化システムの開発 (2014)
  • Author(s): 小守信正, 榎本剛, 三好建正, 山崎哲, 吉田聡, 田口文明
  • Organizer: 日本気象学会2014年度秋季大会
  • Place of Presentation: 福岡国際会議場（福岡県福岡市）
  • Year and Date: 2014-10-23
• [Presentation] 全球大気海洋結合モデルを用いたアンサンブルデータ同化システムの開発 (2014)
  • Author(s): 小守信正, 榎本剛, 三好建正, 山崎哲, 田口文明
  • Organizer: 2014年度日本海洋学会秋季大会
  • Place of Presentation: 長崎大学 文京キャンパス（長崎県長崎市）
  • Year and Date: 2014-09-16
• [Presentation] Development of an ensemble-based data assimilation system with a coupled atmosphere-ocean GCM (2014)
  • Author(s): N. Komori, T. Enomoto, T. Miyoshi, A. Yamazaki, and B. Taguchi
  • Organizer: Asia Oceania Geosciences Society 11th Annual Meeting
  • Place of Presentation: ロイトン札幌（北海道札幌市）
  • Year and Date: 2014-07-30
• [Presentation] Development of an ensemble-based data assimilation system with a coupled atmosphere-ocean GCM (2014)
  • Author(s): N. Komori, T. Enomoto, T. Miyoshi, A. Yamazaki, and B. Taguchi
  • Organizer: 日本地球惑星科学連合2014年大会
  • Place of Presentation: パシフィコ横浜（神奈川県横浜市）
  • Year and Date: 2014-04-29
• [Presentation] AFES-LETKF experimental ensemble reanalysis 2. (2013)
  • Author(s): T. Enomoto, A. Yamazaki, T. Miyoshi, A. Kuwano-Yoshida, N. Komori, J. Inoue, M. E. Hori, Q. Moteki, M. Hattori, and S. Yamane
  • Organizer: 6th WMO Symposium on Data Assimilation
  • Place of Presentation: University of Maryland (College Park, Maryland, U.S.A.)
• [Presentation] 熱帯低気圧に伴う解析アンサンブル・スプレッドの変動.
  • Author(s): 榎本剛, 三好建正, 小守信正
  • Organizer: 日本気象学会2013年度春季大会
  • Place of Presentation: 国立オリンピック記念青少年総合センター（東京都渋谷区）
• [Presentation] Development of an ensemble-based data assimilation system with a coupled atmosphere-ocean GCM.
  • Author(s): N. Komori, T. Enomoto, T. Miyoshi, B. Taguchi, and A. Yamazaki
  • Organizer: Davos Atmosphere and Cryosphere Assembly 2013
  • Place of Presentation: Davos Congress Centre (Davos, Switzerland)
• [Presentation] アンサンブル大気外力に対する全球海洋海氷モデルの応答.
  • Author(s): 小守信正, 田口文明, 山崎哲, 榎本剛, 三好建正
  • Organizer: 2013年度日本海洋学会秋季大会
  • Place of Presentation: 北海道大学 学術交流会館（北海道札幌市北区）
• [Presentation] Development of an ensemble-based data assimilation system with a coupled atmosphere-ocean GCM.
  • Author(s): N. Komori, T. Enomoto, T. Miyoshi, A. Yamazaki, and B. Taguchi
  • Organizer: 6th WMO Symposium on Data Assimilation
  • Place of Presentation: University of Maryland (College Park, Maryland, U.S.A.)
• [Presentation] Development of an ensemble-based data assimilation system with a coupled atmosphere-ocean GCM (II).
  • Author(s): N. Komori, T. Enomoto, T. Miyoshi, A. Yamazaki, and B. Taguchi
  • Organizer: 6th OFES International Workshop and 3rd ESC-IPRC Joint Workshop on Computationally-Intensive Modeling of the Climate System
  • Place of Presentation: East-West Center (Honolulu, Hawaii, U.S.A.)
• [Remarks] 小守 信正 < JAMSTEC
  • URL: http://www.jamstec.go.jp/res/ress/komori/index.ja.html