Kazuyuki Miyazaki is a scientist who specializes in data assimilation of atmospheric composition. His research activities range from the development of chemical data assimilation systems to the study of the impact of air quality on climate and human health. He produced decadal chemical reanalyses based on assimilation of multi-constituent satellite measurements. The reanalysis concentration and emission data products provided unique information on decadal changes in the atmospheric environment that can be used for various applications in air quality and climate research. His current research focuses on development of a multi-model-based chemical data assimilation system and its applications to air quality and climate studies, observing system simulation experiments (OSSE), satellite data and chemistry-climate model evaluations, and the combined use of chemically reactive and carbon gases for emission estimations.

• Ph.D. Geophysics, Tohoku University (2006)

• Multi-constituent data assimilation of chemically reactive and carbon gases for air quality, carbon cycle, and climate studies
• Long-term changes in atmospheric compositions and emissions
• Formation and evaluation of satellite mission concepts through chemical data assimilation and Observing system simulation experiments (OSSEs)
• Synergetic use of satellite, aircraft, and ground-based measurements and models
• Evaluation of new satellite data products and chemistry-climate models

• Scientist, Jet Propulsion Laboratory, California Institute of Technology (2019-present)
• Research Scholar, Jet Propulsion Laboratory, California Institute of Technology (2016-2017)
• Deputy Group Leader, Japan Agency for Marine-Earth Science and Technology (2017-2019)
• Senior Scientist, Japan Agency for Marine-Earth Science and Technology (2013-2019)
• Research Scientist, Japan Agency for Marine-Earth Science and Technology (2011-2012)
• Postdoctoral Scientist, Japan Agency for Marine-Earth Science and Technology (2006-2010)
• Committee member, the IGPB・WCRP・DIVERSITAS subcommittee, Ministry of Education, Culture, Sports, Science and Technology, Japan (2015-2019)
• Expert investigator, National Institute of Science and Technology Policy (2013-2017)
• Visiting Scientist, International Pacific Research Center (IPRC), University of Hawaiʻi (2012-2013)
• Visiting Scientist, Chemistry and Climate Division, Royal Netherlands Meteorological Institute (KNMI) (2010-2012)
• Research Fellow, Category DC1: for excellent Ph.D. students, The Japan Society for the Promotion of Science for Young Scientists (2003-2006)

• NASA group achievement Award to KORUS-AQ (2017)
• Yamamoto-Shono Award from the Meteorological Society of Japan (2012)
• Young Scientist Award from the Japan Society of Atmospheric Chemistry (2009)
• JAMSTEC award for Outstanding Research Accomplishments (2009)
• Best poster award, 5th International Workshop on Global Change: Connection to the Arctic (GCCA5) (2004)
• Japanese Government Scholarship, Ministry of Education, Culture, Sports, Science and Technology (1999-2003)

1. Kanaya, Y., Miyazaki, K., Taketani, F., Miyakawa, T., Takashima, H., Komazaki, Y., Pan, X., Kato, S., Sudo, K., Inoue, J., Sato, K., and Oshima, K.: Ozone and carbon monoxide observations over open oceans on R/V Mirai from 67° S to 75° N during 2012 to 2017: Testing global chemical reanalysis in terms of Arctic processes, low ozone levels at low latitudes, and pollution transport, Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2018-1354, in review, 2019.
2. Fu, D., Kulawik, S. S., Miyazaki, K., Bowman, K. W., Worden, J. R., Eldering, A., Livesey, N. J., Teixeira, J., Irion, F. W., Herman, R. L., Osterman, G. B., Liu, X., Levelt, P. F., Thompson, A. M., and Luo, M.: Retrievals of tropospheric ozone profiles from the synergism of AIRS and OMI: methodology and validation, Atmos. Meas. Tech., 11, 5587-5605, https://doi.org/10.5194/amt-11-5587-2018, 2018.
3. Miyazaki, K., Sekiya, T., Fu, D., Bowman, K. W., Kulawik, S. S., Sudo, K., et al. (2019). Balance of emission and dynamical controls on ozone during the Korea‐United States Air Quality campaign from multiconstituent satellite data assimilation. Journal of Geophysical Research: Atmospheres, 124, 387-413. https://doi.org/10.1029/2018JD028912
4. Tang, W., Arellano, A. F., Gaubert, B., Miyazaki, K., and Worden, H. M.: Satellite Data Reveals a Common Combustion Emission Pathway for Major Cities in China, Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2018-1121, in review, 2018.
5. Jiang, Z., B. C McDonald, H. M Worden, J. R Worden, K. Miyazaki, Z. Qu, D. K. Henze, D. Jones, A. Arellano, E. Fischer, L. Zhu, F. Boersma, Unexpected slowdown of US pollutant emission reduction in the past decade, Proc. Natl. Acad. Sci. USA, https://doi.org/10.1073/pnas.1801191115, 2018.
6. Sekiya, T., Miyazaki, K., Ogochi, K., Sudo, K., and Takigawa, M.: Global high-resolution simulations of tropospheric nitrogen dioxide using CHASER V4.0, Geosci. Model Dev., 11, 959-988, https://doi.org/10.5194/gmd-11-959-2018, 2018.
7. Cuesta, J., Kanaya, Y., Takigawa, M., Dufour, G., Eremenko, M., Foret, G., Miyazaki, K., and Beekmann, M.: Transboundary ozone pollution across East Asia: daily evolution and photochemical production analysed by IASI+GOME2 multispectral satellite observations and models, Atmos. Chem. Phys., https://doi.org/10.5194/acp-2017-972, 2018.
8. Cady-Pereira, K. E., Payne, V. H., Neu, J. L., Bowman, K. W., Miyazaki, K., Marais, E. A., Kulawik, S., Tzompa-Sosa, Z. A., and Hegarty, J. D.: Seasonal and spatial changes in trace gases over megacities from Aura TES observations: two case studies, Atmos. Chem. Phys., 17, 9379-9398, https://doi.org/10.5194/acp-17-9379-2017, 2017.
9. Ding, J., Miyazaki, K., van der A, R. J., Mijling, B., Kurokawa, J.-I., Cho, S., Janssens-Maenhout, G., Zhang, Q., Liu, F., and Levelt, P. F.: Intercomparison of NOx emission inventories over East Asia, Atmos. Chem. Phys., 17, 10125-10141, https://doi.org/10.5194/acp-17-10125-2017, 2017.
10. Miyazaki, K., Eskes, H., Sudo, K., Boersma, K. F., Bowman, K., and Kanaya, Y.: Decadal changes in global surface NOx emissions from multi-constituent satellite data assimilation, Atmos. Chem. Phys., 17, 807-837, doi:10.5194/acp-17-807-2017, 2017.
11. Miyazaki, K. and Bowman, K.: Evaluation of ACCMIP ozone simulations and ozonesonde sampling biases using a satellite-based multi-constituent chemical reanalysis, Atmos. Chem. Phys., 17, 8285-8312, https://doi.org/10.5194/acp-17-8285-2017, 2017.
12. Miyazaki, K., Iwasaki, T., Kawatani, Y., Kobayashi, C., Sugawara, S., and Hegglin, M. I.: Inter-comparison of stratospheric mean-meridional circulation and eddy mixing among six reanalysis data sets, Atmos. Chem. Phys., 16, 6131-6152, doi:10.5194/acp-16-6131-2016, 2016.
13. Kawatani, Y., Hamilton, K., Miyazaki, K., Fujiwara, M., and Anstey, J. A.: Representation of the tropical stratospheric zonal wind in global atmospheric reanalyses, Atmos. Chem. Phys., 16, 6681-6699, doi:10.5194/acp-16-6681-2016, 2016.
14. Jiang, Z., K. Miyazaki, J. R. Worden, J. J. Liu, D. B. A. Jones, and D. K. Henze, Impacts of anthropogenic and natural sources on free tropospheric ozone over the Middle East, Atmos. Chem. Phys., 16, 6537-6546, https://doi.org/10.5194/acp-16-6537-2016, 2016.
15. Miyazaki, K., Iwasaki, T., Kawatani, Y., Kobayashi, C., Sugawara, S., and Hegglin, M. I.: Inter-comparison of stratospheric mean-meridional circulation and eddy mixing among six reanalysis data sets, Atmos. Chem. Phys., 16, 6131-6152, https://doi.org/10.5194/acp-16-6131-2016, 2016.
16. Miyazaki, K., Eskes, H. J., and Sudo, K.: A tropospheric chemistry reanalysis for the years 2005-2012 based on an assimilation of OMI, MLS, TES, and MOPITT satellite data, Atmos. Chem. Phys., 15, 8315-8348, doi:10.5194/acp-15-8315-2015, 2015.
17. Patra, P. K., M. C. Krol, S. A. Montzka, T. Arnold, E. L. Atlas, B. R. Lintner, B. B. Stephens, B. Xiang, J. W. Elkins, P. J. Fraser, A. Ghosh, E. J. Hintsa, D. F. Hurst, K. Ishijima, P. B. Krummel, B. R. Miller, K. Miyazaki, F. L. Moore, J. Mühle, S. O'Doherty, R. G. Prinn, L. P. Steele, M. Takigawa, H. J. Wang, R. F. Weiss, S. C. Wofsy, D. Young, Observational evidence for interhemispheric hydroxyl parity, Nature, doi:10.1038/nature13721, 2014.
18. Miyazaki, K., Eskes, H. J., Sudo, K., and Zhang, C.: Global lightning NOx production estimated by an assimilation of multiple satellite data sets, Atmos. Chem. Phys., 14, 3277-3305, doi:10.5194/acp-14-3277-2014, 2014.
19. Miyazaki, K., and H. Eskes, Constraints on surface NOx emissions by assimilating satellite observations of multiple species, Geophys. Res. Lett., 40, doi:10.1002/grl.50894, 2013.
20. Miyazaki, K., Eskes, H. J., and Sudo, K., Global NOx emission estimates derived from an assimilation of OMI tropospheric NO2 columns, Atmos. Chem. Phys., 12, 2263-2288, doi:10.5194/acp-12-2263-2012, 2012.
21. Miyazaki, K., H. J. Eskes, K. Sudo, M. Takigawa, M. van Weele, and K. F. Boersma, Simultaneous assimilation of satellite NO2, O3, CO, and HNO3 data for the analysis of tropospheric chemical composition and emissions, Atmos. Chem. Phys., 12, 9545-9579, doi:10.5194/acp-12-9545-2012, 2012.
22. Miyazaki K., T. Maki, P. K. Patra, and T. Nakazawa, CO2 fluxes estimated with satellite, aircraft, and surface observations using an ensemble-based 4D data assimilation system, J. Geophys. Res., 116, D16306, doi:10.1029/2010JD015366, 2011.
23. Miyazaki K., S. Watanabe, Y. Kawatani, Y. Tomikawa, K. Sato, and M. Takahashi, Transport and mixing in the extratropical tropopause region in a high vertical resolution GCM. Part I: Potential vorticity and heat budget analysis, J. Atmos. Sci., 67, No. 5, 1293-1314, 2010.
24. Miyazaki K., K. Sato, S. Watanabe, Y. Kawatani, Y. Tomikawa, and M. Takahashi, Transport and mixing in the extratropical tropopause region in a high vertical resolution GCM. Part II: Relative importance of large-scale and small-scale dynamics, J. Atmos. Sci., 67, No. 5, 1315-1336, 2010.
25. Patra, P. K., M. Takigawa, G. S. Dutton, K. Uhse, K. Ishijima, B. R. Lintner, K. Miyazaki, and J.W. Elkins, Transport mechanisms for synoptic, seasonal and interannual SF6 variations and "age" of air in troposphere, Atmos. Chem. Phys., 9, 1209-1225, 2009.
26. Watanabe, S., Y. Tomikawa, K. Sato, Y. KawataniY. Tomikawa, K. Miyazaki, and M. Takahashi, Simulation of the eastward 4-day wave in the Antarctic winter mesosphere using a gravity wave resolving general circulation model, J. Geophys. Res., 114, D16111, doi:10.1029/2008JD011636, 2009.
27. Miyazaki, K., T. Machida, P.K. Patra, T. Iwasaki, Y. Sawa, H. Matsueda, and T. Nakazawa, Formation mechanisms of latitudinal CO2 gradient in the upper troposphere over the subtropics and tropics, J. Geophys. Res., 114, D03306, doi:10.1029/2008JD010545, 2009.
28. Miyazaki, K., and T. Iwasaki, Isentropic diffusion coefficient derived from chemical constituent data, Scientific Online Letters on the Atmosphere, Vol. 5, 009-012, doi:10.2151/sola.2009-003, 2009.
29. Miyazaki, K., Performance of a local ensemble transform Kalman filter for the analysis of atmospheric circulation and distribution of long-lived tracers under idealized conditions, J. Geophys. Res., 114, D19304, doi:10.1029/2009JD011892, 2009.
30. Miyazaki, K., and T. Iwasaki, The gradient genesis of stratospheric trace species in the subtropics and around the polar vortex, J. Atmos. Sci., 65, 490-508, 2008.
31. Miyazaki, K., P. K. Patra, M. Takigawa, T. Iwasaki, and T. Nakazawa, Global-scale transport of carbon dioxide in the troposphere, J. Geophys. Res., 113, D15301, doi:10.1029/2007JD009557, 2008.
32. Miyazaki, K., and T. Iwasaki, On the analysis of mean vertical velocities around the Antarctic polar vortex, J. Atmos. Sci., 65, 3989-4003, 2008.
33. Watanabe, S., Y. Kawatani, Y. Tomikawa, K. Miyazaki, M. Takahashi, K. Sato, General Aspects of a T213L256 Middle Atmosphere General Circulation Model, J. Geophys. Res., 113, D12110, doi:10.1029/2008JD010026, 2008.
34. Miyazaki, K., and T. Iwasaki, Diagnosis of meridional ozone transport based on mass weighted isentropic zonal means, J. Atmos. Sci., 62, 1192-1208, 2005.
35. Miyazaki, K., T. Iwasaki, K. Shibata and M. Deushi, The roles of transports in seasonal variation of total ozone amount, J. Geophys. Res., VOL. 110, D18309, doi:10.1029/2005JD005900, 2005.
36. Miyazaki, K., T. Iwasaki, K. Shibata, M. Deushi and T. Sekiyama, The impact of changing meteorological variables to be assimilated into GCM on ozone simulation with MRI CTM, Journal of the Meteorological Society of Japan, 83, 909-918, 2005.