ABOUT

Atsushi Okazaki is an Associate Professor at the Institute of Advanced Academic Research (IAAR) / Center for Environmental Remote Sensing (CEReS), Chiba University, Japan. His research interests are in stable water isotope modeling and data assimilation for hydrology, weather prediction, and paleoclimate.
The full CV is available HERE

NEWS / Upcoming Talks

• CMIP Community Workshop 2026
  • Bong, H., LeGrande, A.N., Dee, S., Zhu, J., Cauquoin, A., Fiorella, R., Ding, Q., Dutrievoz, N., Tanoue, M., Frazer, M., Sarkar, M., Agosta, C., Yoshimura, K., Werner, M., Okazaki, A., Risi, C., Steen-Larsen, H.C., Casado, M., Wahl, S., Nusbaumer, J.M., Worden, J.R., Good, S.P., Raudzens Bailey, A., Schneider, M., Noel, S., Mandal, S., Bowman, K.W., Li, Y., and Schmidt, G.A. (2026). Exploring the Role of Water Isotopes in CMIP/PMIP: Insights from the Water Isotope Model Intercomparison Project (WisoMIP), CMIP Community Workshop 2026, 9-13 Mar 2026, Kyoto.
  • Cauquoin, A., Li, Y., Okazaki, A., Sun, Y., Werner, M., Yoshimura, K., Modeled response of isotope content in polar precipitation in abrupt-127k experiment using isotope-enabled fully coupled models, CMIP Community Workshop 2026, 9-13 Mar 2026, Kyoto.
  • Kino, K., Okazaki, A., Bong, H., Oki, T., Yoshimura, K., Atmospheric circulation events over the Antarctic and Southern Ocean as key drivers of inland Antarctic ice core isotopes: insights from an isotope-enabled GCM, CMIP Community Workshop 2026, 9-13 Mar 2026, Kyoto.
  • Li, Y., Cauquoin, A., Okazaki, A., Nitta, T., Yoshimura, K., Improve response of d18Osw in the Pacific Ocean to atmosphere-ocean interaction and ENSO using the isotope-enabled Fully Coupled Model MIROC6-iso and a purturbed-parameter ensemble in isotopic model, CMIP Community Workshop 2026, 9-13 Mar 2026, Kyoto.
• AGU25 Annual Meeting
  • Bong, H., LeGrande, A.N., Dee, S., Zhu, J., Cauquoin, A., Fiorella, R.P., Ding, Q., Dutrievoz, N., Tanoue, M., Frazer, M., Sarkar, M., Agosta, C., Yoshimura, K., Werner, M., Okazaki, A., Risi, C., Steen-Larsen, H.C., Casado, M., Wahl, S., Nusbaumer, J., Worden, J., Good, S., Bailey, A., Schneider, M., Noël, S., Mandal, S., Bowman, K., Li, Y., and Schmidt, G.A., Water Isotope Model Intercomparison Project (WisoMIP): Present-day Climate, AGU25 Annual Meeting, 15-19 Dec 2025, New Orleans.
• WMO Weather Modification
  • Higuchi,
• 水文・水資源学会
  • 岡崎淳史, 渡部哲史, 伊藤幸司, 田尻義了,古日記と大規模気候変動データセットを融合した日降水量復元可能性の検討, 水文・水資源学会 2025年度研究発表会, 17-19 Sep 2025, 秋田.
  • 木野佳音, 岡崎淳史, Bong Hayoung, 芳村圭, 同位体気候モデルにおける総観規模現象表現の評価：南大洋の水蒸気同位体比表現の課題, 水文・水資源学会 2025年度研究発表会, 17-19 Sep 2025, 秋田.
  • 渡部哲史, 藤岡悠一郎, 五三裕太, 内海信幸, 木村匡臣, 岡崎淳史, 農業用ため池の特徴に関する多角的な理解に向けて：水共生学における学際的アプローチの試み, 水文・水資源学会 2025年度研究発表会, 17-19 Sep 2025, 秋田.
  • 竹島滉, 白石健太, 岡崎淳史, 露木義, 小槻峻司, 純データ駆動AI気象予報システムClimaX-LETKFの開発, 水文・水資源学会 2025年度研究発表会, 17-19 Sep 2025, 秋田.
• International Symposium on Data Assimilation
  • Okazaki
• International Sociohydrology Conference
  • Watanabe, M., et al., Communicating Ensemble Flood Forecasts with Municipal Officials: A Case Study in Aomori, Japan, The 2nd International Sociohydrology Conference, 19-21 July 2025, Tokyo.
• 2025 American Control Conference
  • Kurosawa, K. and Okazaki, A., Development of a Control Simulation Framework for Meteorological Models with Ensemble Model Predictive Control, 2025 American Control Conference, 7-10 Jul 2025, Denver.
• AOGS
  • Kurosawa, K., Okazaki, A., Ensemble-Based Model Predictive Control for Meteorological Applications: A case of September 2015 Kanto-Tohoku Heavy Rainfall, AOGS2025 22nd Annual Meeting, 27 Jul-1 Aug 2025, Singapore.
  • Okazaki, A., Ito, K., Tajiri, Y., Watanabe, S., Ultra-high Spatiotemporal Resolution Reconstruction of the Climate Around Japan with Large Ensemble of Climate Simulations and Old Documents, AOGS2025 22nd Annual Meeting, 27 Jul-1 Aug 2025, Singapore.
  • Takahashi, M., Okazaki, A., Development of a Mountain Wave Prediction Method at Hanamaki Airport for Safe Aircraft Operations and Motion Control, AOGS2025 22nd Annual Meeting, 27 Jul-1 Aug 2025, Singapore.
• PAGES2K
  • Cheng, J., Cauquoin, A., Okazaki, A., Yoshimura, K., Reconstruction of Climate Variability over the Common Era with Paleoclimate Data Assimilation, PAGES 2025 7th Open Science Meeting, Shanghai, China, 19-24 May 2025.
  • Kino, K., Okazaki, A., Cauquoin, A., Oki, T., Yoshimura, K., Impact of meteorological-scale phenomena on paleoclimate reconstructions: Uncertainties in stable water isotope variations in Antarctic ice cores due to synoptic-scale atmospheric circulation, PAGES 2025 7th Open Science Meeting, Shanghai, China, 19-24 May 2025.
• JpGU 2025
  • Aono, K., Trung, N. T., Maeda, T., Tomii, N., Okazaki, A., Observing system simulation experiment for tropical cyclone prediction using SAMRAI, JpGU Meeting 2025, Chiba, Japan, 25-30 May 2025.
  • Aono, K., Sugimoto, S., Okazaki, A., Wintertime atmospheric response to extreme northward Kuroshio Extension meandering, JpGU Meeting 2025, Chiba, Japan, 25-30 May 2025.
  • Eguchi, N., Kasai, Y., Imasu, Y., Yoshimura, K., Toride, K., Okamoto, K., Saito, N., Hanada, T., Suzuki, J., Saito, M., Okazaki, A., Hatta, S., High-frequency observations of water vapor, isotope, ice clouds and radiation budget by small satellite constellation, JpGU Meeting 2025, Chiba, Japan, 25-30 May 2025.
  • Higuchi, Y., Nagai, R., Okazaki, A., Ogura, M., Wakamiya, N., Evaluation of the Effectiveness of Black-Box Optimization Methods in Weather Intervention Design, JpGU Meeting 2025, Chiba, Japan, 25-30 May 2025.
  • Ishidoya, S., Sugawara, S., Okazaki, A., Diurnal, seasonal, and interannual variations in δ18O of atmospheric O2 and its application to evaluate natural/anthropogenic changes in oxygen, carbon, and water cycles, JpGU Meeting 2025, Chiba, Japan, 25-30 May 2025.
  • Kaneko, R., Shimabukuro, T., Okazaki, A., Kotsuki, S., Precipitation super-resolution using diffusion model with d4PDF, JpGU Meeting 2025, Chiba, Japan, 25-30 May 2025.
  • Kaneko, R., Okazaki, A., Kotsuki, S., Weather field super-resolution using Restricted Boltzmann Machines, JpGU Meeting 2025, Chiba, Japan, 25-30 May 2025.
  • Kino, K., Okazaki, A., Bong, H., Yoshimura, K., Challenges in modeling daily-scale variability of stable isotopes in water vapor over the Southern Ocean, JpGU Meeting 2025, Chiba, Japan, 25-30 May 2025.
  • Kurosawa, K., Okazaki, A., Ensemble-Based Model Predictive Control for Meteorological Applications, JpGU Meeting 2025, Chiba, Japan, 25-30 May 2025.
  • Okazaki, A., Watanabe, S., Ito, K., Tajiri, Y., Ultra-High Spatiotemporal Resolution Reconstruction of the Climate around Japan with Large Ensemble of Climate Simulations and Old Documents, JpGU Meeting 2025, Chiba, Japan, 25-30 May 2025.
  • Mitsui, T., Kotsuki, S., Fujiwara, N., Okazaki, A., Tokuda, K., Bottom-up approach for mitigating extreme events under limited intervention options: a case study with Lorenz 96, JpGU Meeting 2025, Chiba, Japan, 25-30 May 2025.
  • Miyoshi, T., Oishi, S., Tomita, H., Otsuka, S., Taylor, J., Goodliff, M., Liang, J, Konduru, R. T., Sato, M., Honda, T., Matsugishi, S., Kotsuki, S., Okazaki, A., Okamoto, K., Ikuta, Y., Terasaki, K., Yashiro, H., Kanemaru, K., Yamazaki, A., A platform to design and pre-evaluate frequent satellite observing systems for innovating weather, ocean and land surface prediction, JpGU Meeting 2025, Chiba, Japan, 25-30 May 2025.
  • Mitsui, T., Kotsuki, S., Fujiwara, N., Okazaki, A., Tokuda, K., Bottom-up approach for mitigating extreme events under limited intervention options: a case study with Lorenz 96, JpGU Meeting 2025, Chiba, Japan, 25-30 May 2025.
  • Suzumura, T., Okazaki, A., Current Status and Future Prospects of Collecting Old Diaries for Paleoclimate Data Assimilation, JpGU Meeting 2025, Chiba, Japan, 25-30 May 2025.
  • Takahashi, M., Okazaki, A., Validation of FBJP at Hanamaki Airport for Safe Aircraft Operations, JpGU Meeting 2025, Chiba, Japan, 25-30 May 2025.
  • Takeshima, A., Shiraishi, K., Okazaki, A., Tsuyuki, T., Kotsuki, S., ClimaX-LETKF: A pure data-driven artificial intelligence-based ensemble weather forecasting system, JpGU Meeting 2025, Chiba, Japan, 25-30 May 2025.
  • Tiwari, G., Okazaki, A., Error Quantification in Multi-Physics and Initial Conditions, JpGU Meeting 2025, Chiba, Japan, 25-30 May 2025.
• ICCS2025
  • Higuchi, Y., Nagai, R., Okazaki, A., Ogura, M., Evaluating the Effectiveness of Black Box Optimization Methods toward Weather Control, 25th International Conference on Computational Science, 7-9 Jul. 2025, Singapore.
• EGU General Assembly 2025
  • Mitsui, T., Kotsuki, S., Fujiwara, F., Okazaki, A., Tokuda, K., Mitigating extreme events through multi-Scenario ensemble forecasts and local interventions in the Lorenz 96 model, EGU General Assembly 2025, Vienna, Austria, 27 April-2 May 2025.
• A press release about oxygen-isotope measurement was published (02/25/2025)
  • AIST
• Start working at Chiba University as an associate professor (10/01/23)
• Awarded “Hirosaki University Outstanding Young Tehsis Award” (10/21/2022)
• Will attend Uncertainty quantification in models and data, 30th PMIP anniversary as a panelist on 3 Dec. 2021.
• Our research achievement was introduced by a newspaper!
  • Nikkei (07/07/21)
  • Toonippo (07/11/21)
• A press release about GPR was published (07/07/21)
  • JAXA
• start working at Hirosaki University as an assistant professor (03/01/21)