Methodology and application of coupled data assimilation systems

• Project/Area Number: 17H00728
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Statistical science
• Research Institution: The Institute of Statistical Mathematics
• Principal Investigator: Ueno Genta 統計数理研究所, モデリング研究系, 教授 (40370093)
• Co-Investigator(Kenkyū-buntansha): 三好 由純 名古屋大学, 宇宙地球環境研究所, 教授 (10377781) ; 中野 慎也 統計数理研究所, モデリング研究系, 准教授 (40378576) ; 藤井 陽介 気象庁気象研究所, 全球大気海洋研究部, 主任研究官 (60343894)
• Project Period (FY): 2017-04-01 – 2022-03-31
• Project Status: Completed (Fiscal Year 2021)
• Budget Amount: ¥40,040,000 (Direct Cost: ¥30,800,000、Indirect Cost: ¥9,240,000); Fiscal Year 2021: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000); Fiscal Year 2020: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000); Fiscal Year 2019: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000); Fiscal Year 2018: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000); Fiscal Year 2017: ¥9,360,000 (Direct Cost: ¥7,200,000、Indirect Cost: ¥2,160,000)
• Keywords: データ同化 / 海洋 / 放射線帯 / 結合モデル / 磁気圏 / プラズマ / 大気海洋 / ジオスペース

Outline of Final Research Achievements

We compared atmosphere-ocean data assimilation systems based on a coupled model and non-coupled model, and examined conditions under which data assimilation to the coupled model provides better forecast. We developed a method to estimate the solar wind from the geomagnetic activity index and to estimate the magnetosphere and ionosphere by a magnetosphere-ionosphere model driven by the estimated solar wind. Data assimilation of high-energy electron observations by the "Arase" satellite in the radiation belt was performed. We developed a method for a high-dimensional 4D-Var data assimilation by repeating ensemble simulation and optimizing in a randomly selected subspace.

Academic Significance and Societal Importance of the Research Achievements

気象・気候予測の精度向上のため、大気海洋結合同化システムの開発が行われているが、従来の「非」結合システムに対し結合システムが実際に優位となるかどうかは明らかではなかった。本課題では海面水温変動の詳細の再現が結合同化システムの優位性を導くことを明らかにし、今後の精度向上には、海面水温変動の再現性改善を目指すべきことを示した点で、学術的、社会的意義がある。
放射線帯電子の高エネルギー電子変動の理解と予測は、宇宙天気研究の最重要課題の一つとされている。本課題によって放射線帯電子の物理過程を抽出することが可能となり、電子変動を作り出す物理過程の理解に貢献するとともに、宇宙天気予報の高精度化にも寄与する。

Research Products

• [Int'l Joint Research] University of Colorado Boulder(米国)
• [Journal Article] ASTI: Data assimilation system for particle and heat transport in toroidal plasmas (2022)
  • Author(s): Morishita Y.、Murakami S.、Yokoyama M.、Ueno G.
  • Journal Title: Computer Physics Communications Volume: 274 Pages: 108287-108287
  • DOI: 10.1016/j.cpc.2022.108287
  • Peer Reviewed
• [Journal Article] Echo state network model for analyzing solar-wind effects on the AU and AL indices (2022)
  • Author(s): Nakano Shin'ya、Kataoka Ryuho
  • Journal Title: Annales Geophysicae Volume: 40 Issue: 1 Pages: 11-22
  • DOI: 10.5194/angeo-40-11-2022
  • Peer Reviewed / Open Access
• [Journal Article] Off‐Equatorial Pi2 Pulsations Inside and Outside the Plasmapause Observed by the Arase Satellite (2022)
  • Author(s): Teramoto M.、Miyoshi Y.、Matsuoka A.、Kasahara Y.、Kumamoto A.、Tsuchiya F.、Nos? M.、Imajo S.、Shoji M.、Nakamura S.、Kitahara M.、Shnohara I.
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 127 Issue: 1 Pages: 1-18
  • DOI: 10.1029/2021ja029677
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Application of the Ensemble Kalman Smoother to Turbulent Transport Analysis in LHD Plasma (2021)
  • Author(s): MORISHITA Yuya、MURAKAMI Sadayoshi、YOKOYAMA Masayuki、UENO Genta
  • Journal Title: Plasma and Fusion Research Volume: 16 Issue: 0 Pages: 2403016-2403016
  • DOI: 10.1585/pfr.16.2403016
  • NAID: 130007994318
  • ISSN: 1880-6821
  • Year and Date: 2021-02-10
  • Peer Reviewed / Open Access
• [Journal Article] Relativistic Maxwellian mixture model (2021)
  • Author(s): Ueno Genta、Zenitani Seiji
  • Journal Title: Physics of Plasmas Volume: 28 Issue: 12 Pages: 122106-122106
  • DOI: 10.1063/5.0059126
  • Peer Reviewed / Open Access
• [Journal Article] Development of Rapid Simulation Code for NBI Heating Analysis in LHD (2021)
  • Author(s): Morishita Yuya、Murakami Sadayoshi、Yokoyama Masayuki、Seki Ryosuke、Nuga Hideo、Osakabe Masaki、Ueno Genta
  • Journal Title: Journal of Fusion Energy Volume: 41 Issue: 1
  • DOI: 10.1007/s10894-021-00313-5
  • Peer Reviewed
• [Journal Article] EUV signals associated with O+ ions observed from ISS-IMAP/EUVI in the nightside ionosphere (2021)
  • Author(s): Nakano Shin’ya、Hozumi Yuta、Saito Akinori、Yoshikawa Ichiro、Yamazaki Atsushi、Yoshioka Kazuo、Murakami Go
  • Journal Title: Earth, Planets and Space Volume: 73 Issue: 1
  • DOI: 10.1186/s40623-021-01479-0
  • Peer Reviewed / Open Access
• [Journal Article] Auroral zone over the last 3000 years (2021)
  • Author(s): Kataoka Ryuho、Nakano Shin’ya
  • Journal Title: Journal of Space Weather and Space Climate Volume: 11 Pages: 46-46
  • DOI: 10.1051/swsc/2021030
  • Peer Reviewed / Open Access
• [Journal Article] Reconstructing Solar Wind Profiles Associated With Extreme Magnetic Storms: A Machine Learning Approach (2021)
  • Author(s): Kataoka Ryuho、Nakano Shin'ya
  • Journal Title: Geophysical Research Letters Volume: 48 Issue: 23
  • DOI: 10.1029/2021gl096275
  • Peer Reviewed / Open Access
• [Journal Article] Statistical Analysis of Pc1 Wave Ducting Deduced From Swarm Satellites (2021)
  • Author(s): Kim Hyangpyo、Shiokawa Kazuo、Park Jaeheung、Miyoshi Yoshizumi、Stolle Claudia、Buchert Stephan
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 126 Issue: 3
  • DOI: 10.1029/2020ja029016
  • NAID: 120007169536
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The Characteristics of EMIC Waves in the Magnetosphere Based on the Van Allen Probes and Arase Observations (2021)
  • Author(s): Jun Chae‐Woo、Miyoshi Yoshizumi、Kurita Satoshi、Yue Chao、Bortnik Jacob、Lyons Larry、Nakamura Satoko、Shoji Masafumi、Imajo Shun、Kletzing Craig、Kasahara Yoshiya、Kasaba Yasumasa、Matsuda Shoya、Tsuchiya Fuminori、Kumamoto Atsushi、Matsuoka Ayako、Shinohara Iku
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 126 Issue: 6
  • DOI: 10.1029/2020ja029001
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Rocket Observation of Sub‐Relativistic Electrons in the Quiet Dayside Auroral Ionosphere (2021)
  • Author(s): Namekawa T.、Mitani T.、Asamura K.、Miyoshi Y.、Hosokawa K.、Ogawa Y.、Saito S.、Hori T.、Sugo S.、Kawashima O.、Kasahara S.、Nomura R.、Yagi N.、Fukizawa M.、Sakanoi T.、Saito Y.、Matsuoka A.、Shinohara I.、Fedorenko Y.、Nikitenko A.、Koehler C.
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 126 Issue: 7
  • DOI: 10.1029/2020ja028633
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Characterization and Calibration of High‐Energy Electron Instruments Onboard the Arase Satellite (2021)
  • Author(s): Park I.、Miyoshi Y.、Mitani T.、Hori T.、Takashima T.、Kurita S.、Shinohara I.、Kasahara S.、Yokota S.、Keika K.、Claudepierre S. G.、Looper M. D.
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 126 Issue: 7
  • DOI: 10.1029/2021ja029110
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Arase Observation of Simultaneous Electron Scatterings by Upper‐Band and Lower‐Band Chorus Emissions (2021)
  • Author(s): Y. Kazama, Y. Miyoshi, H. Kojima, Y. Kasahara, S. Kasahara, H. Usui, B.‐J. Wang, S.‐Y. Wang, S. W. Y. Tam, T. F. Chang, K. Asamura, S. Matsuda, A. Kumamoto, F. Tsuchiya, Y. Kasaba, M. Shoji, A. Matsuoka, M. Teramoto, T. Takashima, I. Shinohara
  • Journal Title: Geophysical Research Letters Volume: 48(14) Issue: 14 Pages: 1-10
  • DOI: 10.1029/2021gl093708
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Field‐Aligned Electron Density Distribution of the Inner Magnetosphere Inferred From Coordinated Observations of Arase and Van Allen Probes (2021)
  • Author(s): Obana Yuki、Miyashita Yukinaga、Maruyama Naomi、Shinbori Atsuki、Nose Masahito、Shoji Masafumi、Kumamoto Atsushi、Tsuchiya Fuminori、Matsuda Shoya、Matsuoka Ayako、Kasahara Yoshiya、Miyoshi Yoshizumi、Shinohara Iku、Kurth William S.、Smith Charles W.、MacDowall Robert J.
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 126 Issue: 10
  • DOI: 10.1029/2020ja029073
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Periodicities and Colors of Pulsating Auroras: DSLR Camera Observations From the International Space Station (2021)
  • Author(s): Nanjo Sota、Hozumi Yuta、Hosokawa Keisuke、Kataoka Ryuho、Miyoshi Yoshizumi、Oyama Shin‐ichiro、Ozaki Mitsunori、Shiokawa Kazuo、Kurita Satoshi
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 126 Issue: 10
  • DOI: 10.1029/2021ja029564
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Study of an Equatorward Detachment of Auroral Arc From the Oval Using Ground‐Space Observations and the BATS‐R‐US-CIMI Model (2021)
  • Author(s): Yadav Sneha、Shiokawa K.、Oyama S.、et al.
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 126 Issue: 12
  • DOI: 10.1029/2020ja029080
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Improvements in tropical precipitation and sea surface air temperature fields in a coupled atmosphere?ocean data assimilation system (2021)
  • Author(s): Fujii Yosuke、Ishibashi Toshiyuki、Yasuda Tamaki、Takaya Yuhei、Kobayashi Chiaki、Ishikawa Ichiro
  • Journal Title: Quarterly Journal of the Royal Meteorological Society Volume: 147 Issue: 735 Pages: 1317-1343
  • DOI: 10.1002/qj.3973
  • Peer Reviewed / Open Access
• [Journal Article] Intraseasonal SST?precipitation relationship in a coupled reanalysis experiment using the MRI coupled atmosphere?ocean data assimilation system (2021)
  • Author(s): Kobayashi Chiaki、Fujii Yosuke、Ishikawa Ichiro
  • Journal Title: Climate Dynamics Volume: 56 Issue: 7-8 Pages: 2377-2388
  • DOI: 10.1007/s00382-020-05592-w
  • Peer Reviewed / Open Access
• [Journal Article] Non-Gaussian Probability Densities of Convection Initiation and Development Investigated Using a Particle Filter with a Storm-Scale Numerical Weather Prediction Model (2020)
  • Author(s): Kawabata Takuya、Ueno Genta
  • Journal Title: Monthly Weather Review Volume: 148 Issue: 1 Pages: 3-20
  • DOI: 10.1175/mwr-d-18-0367.1
  • Peer Reviewed / Open Access
• [Journal Article] Data assimilation system based on integrated transport simulation of Large Helical Device plasma (2020)
  • Author(s): Morishita Yuya、Murakami Sadayoshi、Yokoyama Masayuki、Ueno Genta
  • Journal Title: Nuclear Fusion Volume: 60 Issue: 5 Pages: 056001-056001
  • DOI: 10.1088/1741-4326/ab7596
  • Peer Reviewed
• [Journal Article] Preliminary results of soil moisture data assimilation into JMA Global Analysis (2020)
  • Author(s): Ochi, K.
  • Journal Title: CAS/JSC WGNE Res. Activ. Atmos. Oceanic Modell. Volume: 50
  • Open Access
• [Journal Article] Nonlinear Filtering Method Using a Switching Error Model for Outlier Contaminated Observations (2019)
  • Author(s): Nakabayashi Akio、Ueno Genta
  • Journal Title: IEEE Transactions on Automatic Control Volume: - Issue: 7 Pages: 1-1
  • DOI: 10.1109/tac.2019.2947649
  • Peer Reviewed
• [Journal Article] 粒子フィルタとデータ同化 (2019)
  • Author(s): 上野玄太
  • Journal Title: 統計数理 Volume: 67 Pages: 241-253
  • Peer Reviewed / Open Access
• [Journal Article] Observing System Evaluation Based on Ocean Data Assimilation and Prediction Systems: On-Going Challenges and a Future Vision for Designing and Supporting Ocean Observational Networks (2019)
  • Author(s): Fujii Yosuke, et al.
  • Journal Title: Frontiers in Marine Science Volume: 6 Pages: 417-417
  • DOI: 10.3389/fmars.2019.00417
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Second Report of TPOS 2020 (2019)
  • Author(s): Kessler, W.S., et al.
  • Journal Title: GOOS Report Volume: 234 Pages: 247-247
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Visualization of rapid electron precipitation via chorus element wave?particle interactions (2019)
  • Author(s): Ozaki M. et al.
  • Journal Title: Nature Communications Volume: 10 Issue: 1 Pages: 1-9
  • DOI: 10.1038/s41467-018-07996-z
  • NAID: 120006550406
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Adjoint-Based Observation Impact Estimation with Direct Verification Using Forward Calculation (2018)
  • Author(s): Ishibashi Toshiyuki
  • Journal Title: Monthly Weather Review Volume: 146 Issue: 9 Pages: 2837-2858
  • DOI: 10.1175/mwr-d-18-0037.1
  • Peer Reviewed / Open Access
• [Journal Article] Geospace exploration project ERG (2018)
  • Author(s): Miyoshi Y.、Shinohara I.、Takashima T.、Asamura K.、Higashio N.、Mitani T.、Kasahara S.、Yokota S.、Kazama Y.、Wang S.-Y.、Tam S. W. Y.、Ho P. T. P.、Kasahara Y.、Kasaba Y.、Yagitani S.、Matsuoka A.、Kojima H.、Katoh Y.、Shiokawa K.、Seki K.
  • Journal Title: Earth, Planets and Space Volume: 70 Issue: 1
  • DOI: 10.1186/s40623-018-0862-0
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The ERG Science Center (2018)
  • Author(s): Miyoshi Y.、Hori T.、Shoji M.、Teramoto M.、Chang T. F.、Segawa T.、Umemura N.、Matsuda S.、Kurita S.、Keika K.、Miyashita Y.、Seki K.、Tanaka Y.、Nishitani N.、Kasahara S.、Yokota S.、Matsuoka A.、Kasahara Y.、Asamura K.、Takashima T.、Shinohara I.
  • Journal Title: Earth, Planets and Space Volume: 70 Issue: 1
  • DOI: 10.1186/s40623-018-0867-8
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Direct measurements of two-way wave-particle energy transfer in a collisionless space plasma (2018)
  • Author(s): Kitamura N.、Kitahara M.、Shoji M.、Miyoshi Y.、Hasegawa H.、Nakamura S.、Katoh Y.、Saito Y.、Yokota S.、Gershman D. J.、Vinas A. F.、Giles B. L.、Moore T. E.、Paterson W. R.、Pollock C. J.、Russell C. T.、Strangeway R. J.、Fuselier S. A.、Burch J. L.
  • Journal Title: Science Volume: 361 Issue: 6406 Pages: 1000-1003
  • DOI: 10.1126/science.aap8730
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Data Assimilation (2017)
  • Author(s): 上野 玄太
  • Journal Title: Journal of The Society of Instrument and Control Engineers Volume: 56 Issue: 9 Pages: 656-661
  • DOI: 10.11499/sicejl.56.656
  • NAID: 130006083186
  • ISSN: 0453-4662, 1883-8170
  • Peer Reviewed
• [Presentation] 相対論的正規混合分布モデル：プラズマ粒子シミュレーションの解析から (2022)
  • Author(s): 上野玄太
  • Organizer: 日本統計学会春季集会
• [Presentation] Four-Dimensional Variational (4DVAR) Global Ocean Data Assimilation System for Coupled Predictions in Japan Meteorological Agency (JMA) (2022)
  • Author(s): Fujii, Y., Y. Adachi, I. Ishikawa, T. Yoshida, S. Hirahara, Y. Kubo, and H. Sugimoto
  • Organizer: Ocean Sciences Meeting 2022
  • Int'l Joint Research
• [Presentation] Wave-Particle Interactions in Geospace (2022)
  • Author(s): I. Shinohara, S. Kurita, S. Matsuda, S. Saito, M. Shoji, S. Nakamura
  • Organizer: 物理学会
• [Presentation] 機械学習によるPi2地磁気脈動の検出とリアルタイムサブストーム警報システムの構築 (2021)
  • Author(s): 酒井悠輔, 能勢正仁, 市原寛, 上野玄太, 中野直人
  • Organizer: Japan Geoscience Union Meeting 2021
• [Presentation] 熱帯太平洋から始めるデータ同化 (2021)
  • Author(s): 上野玄太
  • Organizer: 情報とシステム2021 －不確実な未来へ ～地球規模課題に挑むデータサイエンス～－
• [Presentation] 相対論的Maxwell混合分布モデル (2021)
  • Author(s): 上野玄太, 銭谷誠司
  • Organizer: 名古屋大学宇宙地球環境研究所 研究集会 「宇宙地球環境の理解に向けての統計数理的アプローチ」
• [Presentation] Development of a coupled atmosphere-ocean data assimilation system in the Japan Meteorological Agency: evaluation and future plan (2021)
  • Author(s): Fujii, Y., C. Kobayashi, I. Ishikawa, Takaya, T. Ishibashi, and T. Yoshida
  • Organizer: JpGU Meeting 2021: Virtual
  • Int'l Joint Research
• [Presentation] Evaluation of a coupled atmosphere-ocean reanalysis using tropical Pacific mooring data (2021)
  • Author(s): Fujii, Y., C. Kobayashi, I. Ishikawa, and Y. Takaya
  • Organizer: US CLIVAR Tropical Pacific Observing Needs Workshop
  • Int'l Joint Research
• [Presentation] Evaluation of the coupled atmosphere-ocean reanalysis and future development of the coupled data assimilation system in JMA (2021)
  • Author(s): Fujii, Y., C. Kobayashi, I. Ishikawa, Y. Takaya, T. Ishibashi, and T. Yoshida
  • Organizer: Joint ECMWF/OceanPredict workshop on Advances in Ocean Data Assimilation
  • Int'l Joint Research
• [Presentation] 気象研究所における結合同化システムの開発の成果と今後について (2021)
  • Author(s): 藤井陽介, 石橋俊之, 小林ちあき, 石川一郎
  • Organizer: 名古屋大学宇宙地球環境研究所 研究集会 「宇宙地球環境の理解に向けての統計数理的アプローチ」
• [Presentation] 気象庁季節予報用全球海洋データ同化システムの更新 (2021)
  • Author(s): 藤井陽介、足立恭将、石川一郎、吉田拓馬、平原翔二、久保勇太郎、杉本裕之
  • Organizer: 日本海洋学会2021年度秋季大会
• [Presentation] EUV signals associated with O+ ions observed from ISS-IMAP/EUVI in the nightside ionosphere (2021)
  • Author(s): S. Nakano, Y. Hozumi, A. Saito, I. Yoshikawa, A. Yamazaki, K. Yoshioka, G. Murakami
  • Organizer: 日本地球惑星科学連合2021年大会
  • Int'l Joint Research
• [Presentation] An iterative ensemble-based variational method with ensemble generation in random subspaces (2021)
  • Author(s): S. Nakano
  • Organizer: 日本地球惑星科学連合2021年大会
  • Int'l Joint Research
• [Presentation] Feasibility study of the global MHD simulation code toward reanalysis of the space weather phenomena (2021)
  • Author(s): Shigeru Fujita, Shin'ya Nakano, Akira Kadokura, Yoshimasa Tanaka, Ryuho Kataoka, Aoi Nakamizo, Yasubumi Kubota, Keisuke Hosokawa, Satoko Saita
  • Organizer: 日本地球惑星科学連合2021年大会
  • Int'l Joint Research
• [Presentation] Auroral oval in the last 3000 years and future (2021)
  • Author(s): Ryuho Kataoka, Shin'ya Nakano
  • Organizer: 日本地球惑星科学連合2021年大会
  • Int'l Joint Research
• [Presentation] 機械学習・数値シミュレーション・観測による宇宙プラズマ現象研究に向けた学習データの整備 (2021)
  • Author(s): 深沢 圭一郎, 木村 智樹, 徳永 旭将, 中野 慎也
  • Organizer: 日本地球惑星科学連合2021年大会
• [Presentation] Modeling of the AL index time series with echo state network (2021)
  • Author(s): Shin'ya Nakano, Ryuho Kataoka
  • Organizer: IAGA-IASPEI Joint Assembly 2021
  • Int'l Joint Research
• [Presentation] A machine learning approach to fill the data gaps of the solar wind profiles causing large magnetic storms (2021)
  • Author(s): 片岡龍峰, 中野慎也
  • Organizer: 第150回 地球電磁気・地球惑星圏学会講演会
• [Presentation] Diagnosis of solar-wind effects on the AE indices based on an echo state network model (2021)
  • Author(s): 中野慎也, 片岡龍峰
  • Organizer: 第150回 地球電磁気・地球惑星圏学会講演会
• [Presentation] Feasibility study of the global MHD simulation code toward reanalysis of the space weather phenomena (2021)
  • Author(s): Shigeru Fujita, Shin'ya Nakano, Akira Kadokura, Yoshimasa Tanaka, Ryuho Kataoka, Aoi Nakamizo, Yasubumi Kubota, Keisuke Hosokawa, Satoko Saita
  • Organizer: AGU Fall Meeting 2021
  • Int'l Joint Research
• [Presentation] A machine learning approach to fill the data gaps of the solar wind profiles causing large magnetic storms (2021)
  • Author(s): Ryuho Kataoka and Shin'ya Nakano
  • Organizer: AGU Fall Meeting 2021
  • Int'l Joint Research
• [Presentation] Virtual sounding of solar-wind effects on the AE indices based on an echo state network model (2021)
  • Author(s): Shin'ya Nakano and Ryuho Kataoka
  • Organizer: AGU Fall Meeting 2021
  • Int'l Joint Research
• [Presentation] 機械学習による太陽風データギャップ復元と磁気嵐駆動源の研究 (2021)
  • Author(s): 片岡 龍峰, 中野 慎也
  • Organizer: 名古屋大学宇宙地球環境研究所 研究集会「宇宙地球環境の理解に向けての統計数理的アプローチ」
• [Presentation] Echo state networkによるオーロラ活動指数のモデリング (2021)
  • Author(s): 中野 慎也, 片岡 龍峰
  • Organizer: 名古屋大学宇宙地球環境研究所 研究集会「宇宙地球環境の理解に向けての統計数理的アプローチ」
• [Presentation] アンサンブルによる変分法データ同化とその拡張 (2021)
  • Author(s): 中野 慎也
  • Organizer: 固体地球科学データ同化/データ駆動型地球科学に関する研究会
• [Presentation] Data assimilation of electron radiation belts using the Arase high energy electron data (2021)
  • Author(s): 三好 由純、上野 玄太、齊藤 慎司、栗田 怜、堀 智昭、今城 峻、三谷 烈史、篠原 育、高島 健、東尾 奈々
  • Organizer: Japan Geoscience Union Meeting 2021
  • Int'l Joint Research
• [Presentation] Multiple roles of plasma waves in the inner magnetosphere (2021)
  • Author(s): Y. Miyoshi, Y. Kasahara, H. Kojima, S. Matsuda, S. Kurita, S. Saito, Y. Katoh, A. Matsuooka, I. Shinohara
  • Organizer: ICEAA-IEEE-APWC-USNC-URSI-PSM
  • Int'l Joint Research
• [Presentation] Cross-energy coupling process via wave-particle interactions in Geospace observed by the Arase satellite (2021)
  • Author(s): Y. Miyoshi, I. Shinohara
  • Organizer: General Incorporated Association
  • Int'l Joint Research
• [Presentation] 波動粒子相互作用による地球磁気圏MeV電子の加速 (2021)
  • Author(s): 三好由純、齊藤慎司、松本洋介
  • Organizer: 第38回 プラズマ・核融合学会 年会
• [Presentation] Evaluation of the lead-lag relationship between SST and precipitation in a coupled reanalysis using TAO-TRITON data (2020)
  • Author(s): Fujii, Y., C. Kobayashi, I. Ishikawa, Y. Takaya, and T. Ishibashi
  • Organizer: 2020 AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] Impact of ocean observation systems on ocean analyses and subseasonal forecasts in the Indo-Pacific region (2020)
  • Author(s): Subramanian, A., Y. Fujii, Y. Takaya, et al.
  • Organizer: 2020 AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] Enhanced correlations between SST and precipitation in the weather time scale represented by a coupled atmosphere-ocean data assimilation system (2020)
  • Author(s): Fujii, Y., C. Kobayashi, I. Ishikawa, and Y. Takaya
  • Organizer: 日本地球惑星科学連合2020年大会
  • Int'l Joint Research
• [Presentation] Adaptive Estimation of the Observation-error Covariance and its Application to Particle Filtering (2019)
  • Author(s): Ueno, G.
  • Organizer: AOGS2019
  • Int'l Joint Research / Invited
• [Presentation] Bayesian estimation of the observation-error covariance and its application to particle filtering (2019)
  • Author(s): Ueno, G.
  • Organizer: High Dimensional and Bayesian Inference toward Quantifying Real-World Uncertainties
  • Int'l Joint Research
• [Presentation] Data assimilation of electron radiation belts (2019)
  • Author(s): 1.Miyoshi, Y., Ueno, G., Mitani, T., Takashima, T., Higashio, N., Hori, T., Kurita, S., Teramoto, M. and Shinohara, I.
  • Organizer: IRENE Space Radiation Modeling and Data Analysis Workshop 2019
  • Int'l Joint Research / Invited
• [Presentation] What is the source of chaos in MCS? (2019)
  • Author(s): Kawabata, T. and Ueno, G.
  • Organizer: EMS Annual Meeting 2019
  • Int'l Joint Research
• [Presentation] 数値予報モデルと粒子フィルタ (2019)
  • Author(s): 上野玄太
  • Organizer: 統数研-東北大ワークショップ2019
• [Presentation] データ同化シミュレーションによる物理予測の高度化 (2019)
  • Author(s): 上野玄太
  • Organizer: 第36回プラズマ・核融合学会年会
  • Invited
• [Presentation] ヒストグラムモデルの情報量規準 (2019)
  • Author(s): 上野玄太
  • Organizer: 名古屋大学宇宙地球環境研究所 研究集会 「宇宙地球環境の理解に向けての統計数理的アプローチ」
• [Presentation] ヒストグラムモデルの情報量規準 (2019)
  • Author(s): 上野玄太
  • Organizer: 統計数理研究所公募型共同利用研究集会 データサイエンスの新展開：応用と数理
• [Presentation] Developing the next-generation operational global ocean data assimilation system at JMA (2019)
  • Author(s): Ishizaki, S., H. Sugimoto, Y. Fujii, I. Ishikawa, S. Hirahara, Y. Adachi, Y. Kubo, T. Komori
  • Organizer: OcenPredict'19
  • Int'l Joint Research
• [Presentation] Coupled weather and subseasonal prediction requirements (2019)
  • Author(s): Takaya, Y, and H. Hendon
  • Organizer: 6th TPOS2020 SC Meeting
  • Int'l Joint Research / Invited
• [Presentation] 結合同化システムの短期再解析実験における降水量とSST、海面フラックスとの関係 (2019)
  • Author(s): 小林ちあき、石川一郎、藤井陽介
  • Organizer: 日本気象学会2019年度秋季大会
• [Presentation] Preliminary results of introducing soil moisture data assimilation to the JMA Global Ensemble Prediction System (2019)
  • Author(s): Ochi, K
  • Organizer: ECMWF Annual Seminar 2019
  • Int'l Joint Research
• [Presentation] Tropical Pacific Observing System 2020 (TPOS2020) Project and Relevant Ocean Observing System Evaluation Activities (2019)
  • Author(s): Fujii, Y
  • Organizer: WMO scoping workshop on future activities to assess impact of Various observing systems on earth system prediction
  • Int'l Joint Research / Invited
• [Presentation] Observing System Evaluation Based on Ocean Data Assimilation and Prediction Systems: On-going Challenges and a Future Vision for Designing and Supporting Ocean (2019)
  • Author(s): Fujii, Y, et al.
  • Organizer: OceanObs'19
  • Int'l Joint Research
• [Presentation] Toward better coordination between observational and forecasting communities through OS-Eval activities (2019)
  • Author(s): Fujii, Y.
  • Organizer: OceanObs'19
  • Int'l Joint Research / Invited
• [Presentation] Use of satellite Sea Surface Height (SSH) and Sea Surface Temperature (SST) data in operational 4DVAR Ocean Data Assimilation Systems in JMA (2019)
  • Author(s): Fujii, Y., N. Usui, N. Hirose, Y. Takatsuki, T. Kuragano, and T. Sakurai
  • Organizer: 1st International Operational Satellite Oceanography Symposium
  • Int'l Joint Research / Invited
• [Presentation] Development of weakly coupled atmosphere-ocean data assimilation system and the evaluation of the coupled reanalysis in JMA/MRI (2019)
  • Author(s): Fujii, Y., C. Kobayashi, T. Ishibashi, and Y. Takaya
  • Organizer: JpGU meeting 2019
  • Int'l Joint Research / Invited
• [Presentation] Numerical Weather Prediction Experiments using a Coupled Atmosphere-Ocean Data Assimilation System in JMA/MRI (3) (2019)
  • Author(s): Ishibasi, T., T. Iriguchi, Y. Fujii, T. Yasuda, Y. Takaya, N. Saito, T. Onog
  • Organizer: JpGU meeting 2019
  • Int'l Joint Research
• [Presentation] Development of weakly coupled atmosphere-ocean data assimilation system and the evaluation of the coupled reanalysis in JMA/MRI (2019)
  • Author(s): Fujii, Y., C. Kobayashi, T. Ishibashi, and Y. Takaya
  • Organizer: OceanPredict'19
  • Int'l Joint Research
• [Presentation] 準ニュートン法の海洋データ同化・予測システムでの利用について (2019)
  • Author(s): 藤井陽介
  • Organizer: 名古屋大統数研共同ワークショップ「宇宙地球環境の理解に向けての統計数理的アプローチ」
• [Presentation] The current development status of next seasonal ensemble prediction system (JMA/MRI-CPS3) (2019)
  • Author(s): Kubo, Y., Y. Adachi, J. Chiba, Y. Fujii, S. Hirahara, I. Ishikawa, S. Ishizaki, T. Komori, H. Sugimoto
  • Organizer: 99th AMS Annual Meeting
  • Int'l Joint Research
• [Presentation] Development of a global ocean 4DVAR system for coupled predictions and a plan of applying it for coupled data assimilation (2019)
  • Author(s): Fujii, Y., I. Ishikawa, H. Sugimoto, T. Toyoda, S. Urakawa, T. Komori, Y. Adachi
  • Organizer: 7th International Symposium on Data Assimilation (ISDA)
  • Int'l Joint Research
• [Presentation] 全球4次元変分法海洋同化システムの開発と結合同化への利用 (2019)
  • Author(s): 藤井陽介、石川一郎、杉本裕之、豊田隆寛、浦川昇吾、小森拓也、足立恭将
  • Organizer: 統計数理研究所共同研究集会「宇宙地球環境の理解に向けての統計数理的アプローチ」
• [Presentation] 大気海洋結合データ同化 (2018)
  • Author(s): 石橋俊之
  • Organizer: 第2回 理研・気象庁データ同化研究会
• [Presentation] 結合同化システムの短期再解析実験における降水量－SST関係 (2018)
  • Author(s): 小林ちあき、藤井陽介
  • Organizer: 気象学会春季大会
• [Presentation] Precipitation-SST relationship in a reanalysis dataset by a coupled atmosphere-ocean data assimilation system of JMA/MRI (2018)
  • Author(s): Chiaki Kobayashi , Yosuke Fujii
  • Organizer: JpGU2018
  • Int'l Joint Research
• [Presentation] 次期季節予測システム(JMA/MRI-CPS3)の開発状況について (2018)
  • Author(s): 久保勇太郎、足立恭将、石川一郎、石崎士郎、小森拓也、杉本裕之、千葉丈太郎、平原翔二、藤井陽介
  • Organizer: 第22回海洋データ同化夏の学校
• [Presentation] Development of a global ocean and coupled data assimilation for subseasonal to seasonal forecasts in Japan Meteorological Agency (2018)
  • Author(s): Fujii, Y., T. Toyoda, S. Urakawa, H. Sugimoto, I. Ishikawa, Y. Takaya, C. Kobayashi, T. Ishibashi, and T. Iriguchi
  • Organizer: International Conferences on subseasonal to decadal prediction
  • Int'l Joint Research
• [Presentation] Recent progress in ocean observing system evaluation in JMA and GODAE OceanView (2018)
  • Author(s): Fujii, Y.
  • Organizer: 5th Steering Committee of TPOS2020
  • Int'l Joint Research / Invited
• [Presentation] Coupled weather and S2S predictions (2018)
  • Author(s): Takaya, Y.
  • Organizer: 5th Steering Committee of TPOS2020
  • Int'l Joint Research
• [Presentation] 全球結合予測のための海洋データ同化システムの開発 (2018)
  • Author(s): 藤井陽介、石川一郎、豊田隆寛、浦川昇吾、杉本裕之
  • Organizer: 異常気象研究会・第5回観測システム・予測可能性研究連絡会「季節予測システムの進展と異常気象の要因分析」
• [Presentation] 結合同化システムの短期再解析実験における降水量―SST関係 (2018)
  • Author(s): 小林ちあき、藤井陽介、石川一郎
  • Organizer: 異常気象研究会・第5回観測システム・予測可能性研究連絡会「季節予測システムの進展と異常気象の要因分析」
• [Presentation] Flux evolutions of relativistic electrons of the outer radiation belt as seen from the first year observation of Arase (2018)
  • Author(s): Yoshizumi Miyoshi他
  • Organizer: 日本地球惑星科学連合2018年大会
  • Int'l Joint Research / Invited
• [Presentation] Flux evolution of relativistic electrons of the outer radiation belt associated with coronal hole streams: Arase observations (2018)
  • Author(s): Yoshizumi Miyoshi他
  • Organizer: 米国地球物理学連合総会
  • Int'l Joint Research / Invited
• [Presentation] アンサンブル予報と確率分布推定 (2018)
  • Author(s): 上野玄太
  • Organizer: 第81回CAVE研究会
  • Invited
• [Presentation] Bayesian estimation of the observation error covariance matrix in ensemble-based filters (2018)
  • Author(s): Ueno, G.
  • Organizer: 6th International Symposium on Data Assimilation (2018)
  • Int'l Joint Research
• [Presentation] Subseasonal prediction experiment using an atmosphere-ocean coupled data assimilation system (2018)
  • Author(s): Takaya, Y., Y. Fujii, T. Ishibashi, C. Kobayashi
  • Organizer: 2018 Ocean Sciences Meeting
• [Presentation] Influence of tropical Atlantic SST on Asian monsoon in the summer of 2010 (2018)
  • Author(s): Saito, N., Y. Takaya, Y. Imada, and Y. Takatsuki
  • Organizer: 2018 Ocean Sciences Meeting
• [Presentation] Ocean data assimilation systems in JMA and their representation of SST and sea ice fields, 2018-01-23 Workshop on observations and analysis of sea-surface temperature and sea ice for NWP and climate applications (2018)
  • Author(s): Fujii, Y., T. Toyoda, N. Usui, N. Hirose, Y. Takaya, C. Kobayashi, N. Saito, T. Ishibashi, T. Iriguchi, M. Nosaka, S. Hirahara, T. Komori ,and Y. Adachi
  • Organizer: The European Centre for Medium-Range Weather Forecasts (ECMWF)
  • Int'l Joint Research / Invited
• [Presentation] データ同化システム構築の次の方法 (2017)
  • Author(s): 上野玄太
  • Organizer: SICE制御部門データ科学とリンクした次世代の適応学習制御調査研究会第1回講義会「データ同化とデータ駆動型の科学」
  • Invited
• [Presentation] Data assimilation and optimal error covariance (2017)
  • Author(s): Ueno, G.
  • Organizer: 2nd ISM-ZIB-IMI MODAL Workshop
  • Int'l Joint Research
• [Presentation] 気象予測の舞台裏：シミュレーションとアンサンブル (2017)
  • Author(s): 上野玄太
  • Organizer: 大学共同利用機関シンポジウム
• [Presentation] 結合モデルへのデータ同化 (2017)
  • Author(s): 上野玄太
  • Organizer: 名古屋大学宇宙地球環境研究所研究集会「宇宙環境の理解に向けての統計数理的アプローチ」
• [Presentation] Evaluation of a Coupled Atmosphere-Ocean Data Assimilation System Reanalysis in JMA/MRI (2017)
  • Author(s): Fujii, Y., C. Kobayashi, T. Ishibashi, Y. Takaya, and Y. Takeuchi
  • Organizer: 5th International Conference on Reanalysis (ICR5)
  • Int'l Joint Research
• [Presentation] GODAE Ocean View Activities in JMA (and Japan) (2017)
  • Author(s): Fujii, Y., N. Usui, T. Toyoda, N. Hirose, and H. Igarashi
  • Organizer: 8th Annual meeting of the GODAE Ocean View Science Team
  • Int'l Joint Research
• [Presentation] Coupled Atmosphere-Ocean Data Assimilation (CDA) System Reanalysis in JMA/MRI (2017)
  • Author(s): Fujii, Y., T. Ishibashi, Y. Takaya, and C. Kobayashi
  • Organizer: 16th CAS-TWAS-WMO Forum Symposium on Advance in Seasonal to Decadal Prediction
  • Int'l Joint Research / Invited
• [Presentation] 気象庁全球海洋データ同化システム (2017)
  • Author(s): 杉本裕之
  • Organizer: 第21回データ同化夏の学校
• [Presentation] 気象庁全球数値予報システムを使ったデータ同化研究 (2017)
  • Author(s): 石橋俊之
  • Organizer: 第21回データ同化夏の学校
• [Presentation] 全球大気（及び海洋）解析のためのデータ同化研究 (2017)
  • Author(s): 石橋俊之
  • Organizer: 研究集会「宇宙環境の理解に向けての統計数理的アプローチ」
• [Presentation] 気象研究所における大気海洋結合同化システムの開発と再解析実験 (2017)
  • Author(s): 藤井陽介, 石橋俊之、小林ちあき、高谷祐平、入口武史、豊田隆寛、斉藤直彬、杉本裕之
  • Organizer: 研究集会「宇宙環境の理解に向けての統計数理的アプローチ」
• [Presentation] Numerical Weather Prediction Experiments using a Coupled Atmosphere-Ocean Data Assimilation System in JMA/MRI (2017)
  • Author(s): Toshiyuki Ishibashi, Takeshi Iriguchi, Yosuke Fujii, Tamaki Yausda, Yuhei Takaya, Naoaki Saito, Yoshiaki Takeuchi
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] 気象研究所大気海洋結合同化システム（MRI-CDA1）の数値天気予報システムとしての性質 (2017)
  • Author(s): 石橋俊之
  • Organizer: 日本気象学会2017年度春季大会
• [Book] 人工知能学大事典 (2017)
  • Author(s): 人工知能学会
  • Total Pages: 1600
  • Publisher: 共立出版
  • ISBN: 9784320124202