• Mar., 2016: PhD in Engineering, Department of Civil Engineering, Graduate School of Engineering, The University of Tokyo
• Mar., 2012: MSc in Engineering, Department of Civil Engineering, Graduate School of Engineering, The University of Tokyo
• Mar., 2009: BSc in Engineering, Department of Civil Engineering and Architecture, School of Engineering, Tohoku University

• Jun., 2019-: Postdoctoral Scholar, Department of Meteorology and Atmospheric Science, Pennsylvania State University
• Jun., 2019-: Visiting Researcher, RIKEN Center for Computational Science
• Jun., 2016-: Collaborative Researcher, Institute of Industrial Science, The University of Tokyo
• Apr., 2018-May., 2019: Special Postdoctoral Researcher, RIKEN Center for Computational Science
• Apr,, 2016-Mar., 2018: Postdoctoral Researcher, RIKEN Advanced Institute for Computational Science
• Apr., 2015-Mar., 2016: Research Assistant, Atmosphere and Ocean Research Institute, The University of Tokyo
• Apr., 2013-Mar., 2015: Research Fellow (DC2), Japan Society for Promotion of Science

Submitted/In revision

1. Okazaki, A., On the properties of the ensemble-based offline data assimilation for paleoclimate reconstruction, 2020. in prep.
2. Okazaki, A., Honda, T., Kotsuki, S., Miyoshi, T., Impact assessment of Next Generation Rainfall Measuring Satellite on NWP: An Observation System Simulation Experiment for a typhoon case, 2020. in prep.
3. Shoji, S., Okazaki, A., Yoshimura, K., Impact of proxies and prior estimates on data assimilation using isotope ratios for the climate reconstruction of the last millennium. Submitted to JGR-A (Available at ESSOar)
4. Okazaki, A., Miyoshi, T., Yoshimura, K., Greybush, S. J., and Zhang, F., Revisiting online and offline data assimilation comparison for paleoclimate reconstruction: an idealized OSSE study. Submitted to ESS (Available at ESSOar)
5. Taylor, J., Okazaki, A., Honda, T., Kotsuji, S., Yamaji, M., Kubota, T., Oki, R., Iguchi, T. and Miyoshi, T., Oversampling Reflectivity Observations from a Geostationary Precipitation Radar Satellite: Impact on Typhoon Forecasts within an OSSE Framework. Submitted to JAMES

Published/In print

1. Shoji, S., Okazaki, A., Yoshimura, K., Comparative study towards millennium reanalysis by data assimilation using isotope ratios of proxies, JJSCE, 2020. Accepted
2. Kotsuki, S., Pensoneault, A., Okazaki, A., Miyoshi, T. Weight structure of the Local Ensemble Transform Kalman Filter: A case with an intermediate atmospheric general circulation model. Q. J. R. Meteorol. Soc., 146, 3399–3415, 2020. QJRMS
3. Okazaki, A., Honda, T., Kotsuki, S., Yamaji, M., Kubota, T., Oki, R., Iguchi, T., and Miyoshi, T., Simulating precipitation radar observations from a geostationary satellite, Atmos. Meas. Tech., 12, 3985-3996, 2019. AMT
4. Okazaki, A., and Yoshimura, K., Global evaluation of proxy models for stable water isotopes with realistic atmospheric forcing, JGR-Atmos, 124, 8972– 8993, 2019. JGR-A
5. Shoji, S., Okazaki, A., and Yoshimura, K., Study on spatiotemporal characteristic of observation impact in proxy data assimilation, JJSCE, 74 (5), I_49-I_54, 2018. JJSCE
6. Hydro 2k Consortium, Comparing proxy and model estimates of hydroclimate variability and change over the Common Era, Clim. Past., 13, 1851-1900, 2017. CP
7. Okazaki, A., and K. Yoshimura, Development and evaluation of a system of proxy data assimilation for paleoclimate reconstruction, Clim. Past, 13, 379-393, 2017. CP
8. Wei, Z., K. Yoshimura, A. Okazaki, K. Ono, W. Kim, M. Yokoi, C.-T. Lai, Understanding the variability of water isotopologues in near-surface atmospheric moisture over a humid subtropical rice paddy in Tsukuba, Japan, J. Hydrology, 533, 91-102, 2016. J. Hydrology
9. Wei, Z., K. Yoshimura, A. Okazaki, W. Kim, Z. Liu, M. Yokoi, Partitioning of evapotranspiration using high frequency water vapor isotopic measurement over a paddy field, Water Resour. Res., 51(5), 3716-3729, 2015. WRR
10. Okazaki, A., Y. Satoh, G. Tremoy, F. Vimeux, R. Scheepmaker, and K. Yoshimura, Interannual variation of vapor isotope in West Africa and its relation to ENSO, Atmos. Chem. Phys., 15, 3193-3204, 2015. ACP
11. Wei, Z., A. Okazaki, H. Maeda, Y. Satoh, M. Kiguchi, K. Noda, M. Koike, W. Kim, Z. Liu, and K. Yoshimura, Investigating vegetation-atmosphere water exchange by using high frequency spectroscopy vapor isotope observations, Journal of Japan Society of Civil Engineers, Ser. B1, 70, 181-186, 2014. JJSCE
12. Okazaki, A., P. J.-F. Yeh, K. Yoshimura, M. Watanabe, M. Kimoto, and T. Oki, Changes in Flood Risk under Global Warming Estimated Using MIROC5 and the Discharge Probability Index, J. Meteor Soc. Japan, 90(4), 509-524, 2012. JMSJ

1. Okazaki, A., Miyoshi, T., Yoshimura, K., Greybush, S. J., and Zhang, F., Exploring online data assimilation for paleoclimate reconstruction using an idealized OSSE framework, AMS 101st Annual Meeting, 10-15 January 2021.
2. Kino, K., Okazaki, A., Cauquoin, A., Yoshimura, K., LGM simulation with MIROC5-iso and impacts of the Southern Annular Mode on stable water isotopes in the Antarctic ice cores, PMIP2020, 26-30 October, 2020.
3. Taylor, J., Okazaki, A., Yamaji, M., Kubota, T., Miyoshi, T., Evaluating the Sensitivity of Precipitation Radar Observations from a Geostationary Satellite on Typhoon Forecasts, AOGS 2020, Hongcheon, South Korea, 28 Jun - 4 Jul, 2020.
4. Kanon Kino, Atsushi Okazaki, Alexandre Cauquoin and Kei Yoshimura, Investigation of the response of water isotope records to the changes in orbital forcing with the isotope-enabled AGCM MIROC5-iso, EGU General Assembly 2020, 4-8 May 2020.
5. Okazaki, A., Honda, T., Kotsuki, S., Taylor, J., Miyoshi, T., Impact assessment of Next Generation Rainfall Measuring Satellite on NWP: An Observation System Simulation Experiment for a typhoon case, 39th International Conference on Radar Meteorology, Nara, Japan, Sep 16-20 2019.
6. Okazaki, A., Miyoshi, T., Yoshimura, K., Zhang, F., Iterative-DA for paleoclimate reconstruction, Data Assimilation, Reanalyses and Proxy System Modeling in Paleoenvironmental Science, College Park, MD, May 29-31 2019.
7. Shoji, S., Okazaki, A., Yoshimura, K., Study on proxy data assimilation aimed at climate reconstruction for the last millennium, EGU General Assembly 2019, Vienna, Austria, Apr. 7-12 2019.
8. 岡崎淳史、本田匠、小槻峻司、三好建正、次世代静止衛星搭載降水レーダ反射強度の観測システムシミュレーション実験、日本気象学会2019年度春季大会、2019年5月17日、東京
9. 岡崎淳史、本田匠、小槻峻司、James Taylor、三好建正、静止衛星による降水観測が台風予測に与えるインパクト評価、データ同化手法を活用した観測システムの影響評価に関する研究会、2019年4月18－19日、JAMSTEC横浜研究所
10. 中村晋一郎、岡崎淳史、木村匡臣、土井祥子、西原是良、山崎大、渡部哲史、水文・水資源学会研究グループ「社会水文学の我が国での推進に向けた可能性研究」、水文水資源学会　2019年度研究発表会，千葉.
11. Okazaki, A., Honda, T., Kotsuki, S., Miyoshi, T., Precipitation radar data assimilation with an ensemble Kalman filter: an observing system simulation experiment for a typhoon case, ADAPT seminar, PSU, PA, US, Mar 29 2019. (invited)
12. Okazaki, A., Honda, T., Kotsuki, S., Miyoshi, T., Precipitation radar data assimilation with an ensemble Kalman filter: an observing system simulation experiment for a typhoon case, The 7th International Symposium on Data Assimilation, Kobe, Japan, Jan 21-24 2019.
13. Okazaki, A., Miyoshi, T., Yoshimura, K., Zhang, F., Paleoclimate Reconstruction with Iterative Data Assimilation: An Observing System Simulation Experiment with an Intermediate AGCM, The 7th International Symposium on Data Assimilation, Kobe, Japan, Jan 21-24 2019. (poster)
14. Okazaki, A., Miyoshi, T., Yoshimura, K., and Zhang, F.: “An online data assimilation method to assimilate time-averaged observations”, AGU 2018 Fall Meeting, Washington DC, US, Dec. 10-14, 2018. (poster)
15. Okazaki, A., Miyoshi, T., and Yoshimura, K.: “Millennium reanalysis using proxy and data assimilation”, The 11th International Atmospheric Circulation Reconstructions over the Earth (ACRE) Meeting, Tokyo Metropolitan University, Nov. 12-16, 2018. (poster)
16. Okazaki, A., Honda, T., Kotsuki, S., and Miyoshi, T.: “Dense precipitation radar data assimilation with an ensemble Kalman filter: an observing system simulation experiment for a typhoon case”, 5th International Workshop on Nonhydrostatic Models, Tokyo, Nov. 14-16, 2018. (poster)
17. 岡﨑淳史、本田匠、小槻峻司、三好建正、台風を対象とした高密度降水レーダ反射強度の観測システムシミュレーション実験、日本気象学会秋季大会、2018年10月29日-11月1日、仙台
18. 2018 May, Okazaki, A., Miyoshi, T., Yoshimura, K., Zhang, F., Toward online data assimilation for the millennium reanalysis, A-CC29, JpGU 2018, Makuhari, Chiba, Japan, May 20-24 2018. (invited)
19. 2018 May, Okazaki, A., Honda, T., Kotsuki, S., Miyoshi, T., Dense precipitation radar data assimilation: an observing system simulation, A-AS01, JpGU 2018, Makuhari, Chiba, Japan, May 20-24 2018. (poster)
20. 2018 May, Okazaki, A., Miyoshi, T., Yoshimura, K., Zhang, F., Exploring online data assimilation for paleoclimate reconstruction using an idealized OSSE framework, The 8th EnKF Data Assimilation Workshop, Montreal, Quebec, Canada, May 7-10 2018.
21. 2018 May, Okazaki, A., Honda, T., Kotsuki, S., Miyoshi, T., Dense precipitation radar data assimilation experiment for a typhoon case, The 8th EnKF Data Assimilation Workshop, Montreal, Quebec, Canada, May 7-10 2018.
22. 2018 Jan, Okazaki, A., Miyoshi, T., Yoshimura, K., and Zhang, F., Exploring online data assimilation for paleoclimate reconstruction using an idealized OSSE framework, Third Symposium on Multi-scale Predictability: Data-model Integration and Uncertainty Quantification for Climate and Earth System Monitoring and Prediction (the 98th Annual Meeting), Austin, TX, US, January 7-11 2018.
23. 2017 Oct., Okazaki, A, Yoshimura, K., and Miyoshi, T., Evaluation​ ​of​ ​an​ ​isotopic​ ​proxy​ ​data​ ​assimilation​ ​system, Third Annual LMR Workshop: Climate​ ​Dynamics​ ​with​ ​the​ ​Last​ ​Millennium​ ​Reanalysis, NCAR, Boulder, CO, US, October 2-3, 2017.
24. 2017 Aug, Okazaki, A., Honda, T., Kotsuki, S., Yamaji, M., Kubota, T., Oki, R., Iguchi, T., Miyoshi, T., Simulating a precipitation radar onboard a geostationary satellite, AMS 38th Conference on Radar Meteorology, 28 Aug.- 1 Sep. 2017, Chicago, IL, US.
25. 2017 May, Atsushi Okazaki, Development and evaluation of isotopic proxy data assimilation system, First workshop of the PAGES working group on Paleoclimate Reanalyses, Data Assimilation and Proxy System modelling (DAPS), Louvain-la-Neuve, Belgium, 29 May-1 Jun 2017. (invited)
26. 2017 May, 岡﨑淳史, 本田匠, 小槻峻司, 三好建正, 高密度降水レーダ反射強度の観測システムシミュレーション実験, 日本気象学会2017年度春季大会, 東京, 日本, 25-28 May, 2017.
27. 2017 May, Yoshimura, K., Okazaki, A., and Neluwala, P., Challenges for millennium reanalysis, JpGU-AGU Joint Meeting 2017, Makuhari, Japan, 20-25 May, 2017. (invited)
28. 2017 May, Okazaki, A., K. Yoshimura, and T. Miyoshi, Application of data assimilation to paleoclimate, JpGU-AGU Joint Meeting 2017, Makuhari, Japan, 20-25 May, 2017.
29. 2017 May, Okazaki, A., Honda, T., Kotsuki, S., and Miyoshi, T., Data assimilation of dense precipitation radar, JpGU-AGU Joint Meeting 2017, Makuhari, Japan, 20-25 May, 2017.
30. 2017 Mar., Okazaki, A., K. Yoshimura, and T. Miyoshi, Review and development of data assimilation for paleoclimate, RISDA2017, Kobe, Japan, Feb. 27-Mar. 2 2017.
31. 2017 Feb., Okazaki, A., K. Yoshimura, and T. Miyoshi, Data assimilation in paleoclimate, The 7th AICS International Symposium, Kobe, Japan, Feb. 23-24 2017.
32. 2016 Oct., Meteo. Soc. Japan.
33. 2016 Oct., Okazaki, A., Basics of data assimilation and its application to paleoclimate, Kongju National University, Gongju, Korea, 17-21 Oct., 2016. (invited)
34. 2016 Apr., A. Okazaki, K. Yoshimura, Evaluation of a proxy model for isotope in tree-ring cellulose and its application, IsoEcol2016, Tokyo, Japan, 4-8 Apr. 2016.
35. 2016 Mar., A. Okazaki, Toward the assimilation of climate proxy data, Joint US-Japan Workshop on Climate Change and Variability, San Diego, US, 21-22 March 2016.
36. 2016 Mar., A. Okazaki, K. Yoshimura, The evaluation of mechanical model for isotope ratio in tree ring cellulose toward reconstruction of long-term Asian monsoon rainfall, The International Science Conference on MAHASRI, Tokyo, Japan, 2-4 Mar. 2016.
37. 2014 Dec., Atsushi Okazaki, Kei Yoshimura, PP31D-1179, Time slice simulation for LIA and MCA with stable water isotopes and comparison with modern situation, AGU Fall Meeting 2014, San Francisco, 2014/12/17.
38. 2014 Sep., 岡崎淳史，芳村圭，同位体大循環モデルの開発とその同位体境界条件への応答，水文水資源学会　2014年度研究発表会，宮崎．
39. 2013 Dec., Z. Wei, H. Maeda, A. Okazaki, K. Noda, M. Kiguchi, M. Koike, W. Kim, M. Yokoi, K. Yoshimura, High-frequency water vapor isotope measurements with a laser spectrometer in a paddy field during growing season and application for evapotranspiration partitioning, B21A-0456, AGU Fall meeting 2013, San Francisco, US.
40. 2013 Dec., A. Okazaki, Y. Satoh, G. Tremoy, F. Vimeux, and K. Yoshimura, Interannual variation of vapor isotope in West Africa and its relation to ENSO, A11G-0135, AGU Fall meeting 2013, San Francisco, US.
41. 2013 Nov., 前田英俊，魏忠旺，岡崎淳史，乃田啓吾，木口雅司，小池雅洋，金元植，芳村圭，レーザー分光計を用いた水田状の連続高頻度水蒸気同位体比測定，2013年気象学会秋季大会，仙台.
42. 2013 Oct., A. Okazaki, Y. Satoh, G. Tremoy, F. Vimeux, and K. Yoshimura, Interannual variability of delt-18O of water vapor in West Africa and its relation to ENSO, First International Workshop on Advances In Observations, Models And Measurement Techniques Of Atmospheric Water Vapor Isotopes, Paris.
43. 2012 Dec., Y. Satoh, K. Yoshimura, YN. Pokhrel, S. Koirala, A. Okazaki, H. Kim, T. Oki, Impact of Climate Change on drought with terrestrial hydrologic simulation considering anthropogenic factors, H41B-1177, AGU Fall Meeting 2012, San Francisco, US.
44. 2012 May., A. Okazaki, K. Yoshimura, N. Takeuchi, K. Fujita, V. Aizen, and T. Oki, Numerical simulation of isotopic ratio in snow using an offline model, JpGU2012-ACC31-P05, Makuhari, Japan.
45. 2012 Apr., A. Okazaki, K. Yoshimura, N. Takeuchi, K. Fujita, V. Aizen, and T. Oki, Simulation of vertical profiles of stable water isotopes in a snow pit using a new offline isotopic snow-icecore model, EGU2012-8220, Vienna.
46. 2011 Jan., A. Okazaki, T. Nitta, D. Yamazaki, K. Yoshimura, M. Watanabe, M. Kimoto, and T. Oki, Estimation of flood risk change under global warming using the latest CGCM and discharge probability index, JSPS international Forum “Climate Change in Monsoon Asia (CCMA)”, Bangkok.

1. 2018-2020, Grant-in-Aid for RIKEN SPDR, 3,000,000JPY
2. 2017-2019, JSPS Grant-in-Aid for Young Scientists (B), 3,120,000JPY
3. 2013-2015, Grant-in-Aid for JSPS Fellows, 2,000,000JPY

• Atmosphere (2)
• Atmospheric Chemistry and Physics (1)
• Climate Dynamics (1)
• Earth and Space Science (1)
• Geochemical Journal (1)
• Geophysical Research Letters (1)
• Geoscience Data Journal (1)
• Journal of Geophysical Research: Atmosphere (1)
• Journal of Geophysical Research: Biogeosciences (1)
• Journal of the Meteorological Society of Japan (2)
• Nature (1)
• Nature Communications (1)
• Tellus-A (1)

• Oct. 2020- : Atmosphere, Journal Topic Board
• Nov. 2018- : Journal of Japan Society of Hydrology and Water Resources