Study on the ocean observing system evaluation using quasi-coupled data assimilation and breeding methods

• Project/Area Number: 24740324
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Meteorology/Physical oceanography/Hydrology
• Research Institution: Japan, Meteorological Research Institute
• Principal Investigator: Fujii Yosuke 気象庁気象研究所, 海洋地球化学研究部, 主任研究官 (60343894)
• Co-Investigator(Renkei-kenkyūsha): OGAWA Koji 気象庁気象研究所, 海洋・地球化学研究部, 研究官 (30586706)
• Research Collaborator: BALMASEDA Magdalena ; OKE Peter ; Xue Yan
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: データ同化 / 観測システム評価 / アルゴフロート / TAO/TRITON / エルニーニョ / TAO/TRITONアレイ / 熱帯太平洋観測システム / 観測システム実験 / TPOS2020 / 海洋観測システム / 海洋データ同化 / 係留ブイ / 結合ブリーディング / 結合同化 / 感度解析 / 国際情報交換

Outline of Final Research Achievements

(1) This study clarified effects of observation data on ocean data assimilation results for some specific areas. For example, TAO/TRITON buoy data have large impacts in the western equatorial Pacific.
(2) This study clarified effects of observation data on El Nino forecasts using ocean data assimilation systems. For example, TAO/TRITON buoy data improves the accuracy by 3-7% and the effects increase with the lead time of the forecasts.
(3) This study clarified that the reduction of TAO/TRITON buoy data after 2012 affects El Nino forecasts by operational centers through intercomparison of operational analysis fields, and summarized results of researches on the importance of TAO/TRITON buoy data.

Research Products

• [Journal Article] Evaluation of the Tropical Pacific Observing System from the Ocean Data Assimilation Perspective (2015)
  • Author(s): Fujii Y, Cummings J, Xue Y, Schiller A, Lee T, Balmaseda MA, Remy E, Masuda S, Alves O, Brassington G, Cornuelle B, Martin M, Oke P, Smith G, Yang X
  • Journal Title: Quarterly Journal of the Royal Meteorological Society Volume: 印刷中 Issue: 692 Pages: 2481-2496
  • DOI: 10.1002/qj.2579
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Evaluating the impacts of the tropical Pacific observing system on the ocean analysis fields in the global ocean data assimilation system for operational seasonal forecasts in JMA. (2015)
  • Author(s): Fujii Y, Ogawa K, Brassington GB, Ando K, Yasuda T, Kuragano T
  • Journal Title: Journal of Operational Oceanography Volume: 印刷中 Issue: 1 Pages: 25-39
  • DOI: 10.1080/1755876x.2015.1014640
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Assessing the impact of observations on ocean forecasts and reanalyses: Part 1, Global studies. (2015)
  • Author(s): Oke PR, Larnicol G, Fujii Y, Smith GC, Lea DJ, Guinehut S, Remy E, Balmaseda MA, Rykova T, Surcel-Colan D, Martin MJ, Sellar AA, Mulet S, Turpin V
  • Journal Title: Journal of Operational Oceanography Volume: 印刷中 Issue: sup1 Pages: s49-s62
  • DOI: 10.1080/1755876x.2015.1022067
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] White Paper #5: Evaluation of the Tropical Pacific Observing System from the data assimilation perspective. (2014)
  • Author(s): Fujii Y, Cummings J, Xue Y, Schiller A, Lee T, Balmaseda MA, Remy E, Masuda S, Alves O, Brassington G, Cornuelle B, Martin M, Oke P, Smith G, Yang X
  • Journal Title: GCOS Report Volume: 184 Pages: 102-129
  • Open Access
• [Journal Article] White Paper #4: Operational forecasting systems (2014)
  • Author(s): Balmaseda MA, Kumar A, Andersson E, Takaya Y, Anderson D, Janssen P, Martin M, Fujii Y
  • Journal Title: GCOS Report Volume: 184 Pages: 64-101
  • Open Access
• [Journal Article] Seasonal barotropic sea surface height fluctuation in relation to regional ocean mass variation (2014)
  • Author(s): Kuragano T, Fujii Y, Toyoda T, Usui N, Ogawa K, Kamachi M
  • Journal Title: Journal of Oceanography Volume: 70 Issue: 1 Pages: 45-62
  • DOI: 10.1007/s10872-013-0211-7
  • NAID: 40019971122
  • Peer Reviewed
• [Presentation] Recent ocean observation system evaluation studies in JMA/MRI. (2014)
  • Author(s): Fujii Y, Kuragano T, Ogawa K, Usui N, Toyoda T, Kamachi M
  • Organizer: GODAE Ocean View OSEval-TT workshop 2014
  • Place of Presentation: Collecte Localisation Satellites, ツールーズ, フランス
  • Year and Date: 2014-12-10 – 2014-12-11
• [Presentation] Evaluation of the Tropical Pacific Observing System from the Ocean Data Assimilation Perspective in the TPOS2020 Workshop (2014)
  • Author(s): Fujii Y, Cummings J, Xue Y, Schiller A, Lee T, Balmaseda MA, Remy E, Masuda S, Alves O, Brassington G, Cornuelle B, Martin M, Oke P, Smith G, Yang X
  • Organizer: GODAE Ocean View OSEval-TT workshop 2014
  • Place of Presentation: Collecte Localisation Satellites, ツールーズ, フランス
  • Year and Date: 2014-12-10
• [Presentation] ENSO予測のための海洋データ同化システムの現状と今後の展開 (2014)
  • Author(s): 藤井陽介, 豊田隆寛
  • Organizer: 研究会「長期予報と大気大循環」
  • Place of Presentation: 気象庁, 東京都千代田区
  • Year and Date: 2014-12-03
• [Presentation] Evaluation of ARGO network for monitoring eddies using space-time correlation scale statistically estimated from 20-year SLA data (2014)
  • Author(s): Kuragano, T, Fujii Y, Kamachi M
  • Organizer: 2014 OSTST meeting
  • Place of Presentation: ステインベルグインゼルホテル, ドイツ, レイクコンスタンス
  • Year and Date: 2014-10-30
• [Presentation] Japan Report on National Forecasting System (MOVEMRI.COM) and Japan Working Team: Progress in 2012-2014 (2014)
  • Author(s): Kuragano T, Kamachi M, Fujii Y, Usui N, Ishizaki S, Takaya Y, Toyoda T, Sakamoto K
  • Organizer: GODAE Ocean View 科学運営委員会
  • Place of Presentation: キャピタルホテル, 中国, 北京
  • Year and Date: 2014-10-15
  • Invited
• [Presentation] 熱帯太平洋における観測データの同化解析結果の精度に対するインパクト評価 (2014)
  • Author(s): 藤井陽介, 小川浩司, 安藤健太郎, 安田珠幾
  • Organizer: 日本海洋学会2014年秋期大会
  • Place of Presentation: 長崎大学, 長崎県長崎市
  • Year and Date: 2014-09-16
• [Presentation] 海面高度の統計的時空間スケール情報を利用したアルゴ観測網の中規模渦補足能力の評価 (2014)
  • Author(s): 倉賀野連、藤井陽介、蒲地政文
  • Organizer: 日本海洋学会2014年秋期大会
  • Place of Presentation: 長崎大学, 長崎県長崎市
  • Year and Date: 2014-09-16
• [Presentation] Evaluating the Impacts of the Tropical Pacific Observing System in the JMA Seasonal Forecasting System. AOGS 11th Annual Meeting (2014)
  • Author(s): Fujii Y, Ando K, Ogawa K, Kuragano T, Kamachi M
  • Organizer: AOGS 11th Annual Meeting
  • Place of Presentation: ロイトン札幌ホテル, 北海道札幌市
  • Year and Date: 2014-07-30
• [Presentation] Evaluation of the Tropical Pacific Observing System from the Ocean Data Assimilation Perspective (2014)
  • Author(s): Fujii Y, Cummings J, Xue Y, Schiller A, Lee T, Balmaseda M, Remy E, Masuda S, Alves O, Brassington G, Comuelle B, Martin M, Oke P, Smith G, Yang X
  • Organizer: A future Sustained Tropical Pacific Ocean Observing System for Research and Forecasting
  • Place of Presentation: La Jolla, USA
  • Invited
• [Presentation] Operational Forecasting System (2014)
  • Author(s): Balmaseda MA, Kumar A, Anderson E, Takaya Y, Anderson D, Janssen P, Fujii Y
  • Organizer: A future Sustained Tropical Pacific Ocean Observing System for Research and Forecasting
  • Place of Presentation: La Jolla, USA
  • Invited
• [Presentation] Insight on Steric Height (and Heat Content) behavior in MRI-JMA products (2013)
  • Author(s): Fujii Y, Toyoda T, Kuragano T, Kamachi M
  • Organizer: CLIVAR GSOP/GODAE Ocean Reanalyses Intercomparison Workshop
  • Place of Presentation: ECMWF, Reading, UK
  • Invited
• [Presentation] エルニーニョと同化研究 (2013)
  • Author(s): 藤井陽介, 豊田隆寛, 安田珠幾, 安藤健太郎, 杉浦望実, 蒲地政文
  • Organizer: 2013年度日本海洋学会秋季大会シンポジウム「太平洋・インド洋の熱帯気候変動研究：過去から未来へ」
  • Place of Presentation: 北海道大学札幌キャンパス, 北海道札幌市
  • Invited
• [Presentation] Activities of Observation System Evaluation and Design in JMA/MRI. (2013)
  • Author(s): Fujii Y, Ogawa K, Toyoda T, Usui N, Kuragano T, Kamachi M
  • Organizer: GODAE Ocean View Symposium 2013
  • Place of Presentation: Baltimore, USA
• [Presentation] Overview of Observing System Evaluation in GODAE OceanView (2013)
  • Author(s): Oke P, Larnicol G, Balmaseda M, Weaver A, Bertino L, Sakov P, Brassington G, Cummings J, Hogan P, Fujii Y, Kourafalou V, Lea D, Martin M, Mehra A, Remy E, Smith G, Tanajura C, Tianyu Z, Bell M, Dombrowsky E, Hernandez F, Lindstrom E, Schiller A, Bonekamp H
  • Organizer: GODAE Ocean View Symposium 2013
  • Place of Presentation: Baltimore, USA
  • Invited
• [Presentation] Evaluation of Argo float impacts on the ocean data assimilation system in JMA/MRI (2012)
  • Author(s): Yosuke Fujii, Koji Ogamwa, Kentaro Ando, and Masafumi Kamachi
  • Organizer: 4th Argo Science Workshop
  • Place of Presentation: Venice, Italy
• [Presentation] Intercomparison of data-free and data-assimilated ocean simulations with a common ocean model forced by CORE II data (2012)
  • Author(s): Fujii, Y., H. Tsujino, T. Toyoda, T. Kuragano, and M. Kamachi
  • Organizer: CLIVAR-GSOP Workshop Ocean Synthesis and Ari-Sea Flux Evaluation
  • Place of Presentation: Woods Hole, USA
  • Invited
• [Presentation] アルゴフロート観測による海洋内部状態の再現性の向上 (2012)
  • Author(s): 小川浩司
  • Organizer: 第10回環境研究シンポジウム
  • Place of Presentation: 東京都千代田区