西澤 誠也 (にしざわ せいや)

学歴

研究歴

委員等

獲得外部資金等

受賞

査読付き論文リスト

クリックで展開
  1. Miyamoto, Y., S. Nishizawa, and H. Tomita, 2020: Impacts of number of cloud condensation nuclei on two-dimensional moist Rayleigh convection. J. Met. Soc. Japan, 98, Early Online Release, doi:10.2151/jmsj.2020-023
  2. Sueki, K., T. Yamaura, H. Yashiro, S. Nishizawa, R. Yoshida, Y. Kajikawa, and H. Tomita, 2019: Convergence of convective updraft emsembles with respect to the grid spacing of atmospheric models. Geophys. Res. Lett., 46, 14817-14825, doi:10.1029/2019GL084491
  3. Yamaura, T., S. Nishizawa, and. H. Tomita, 2019: Theoretical time evolution of numerical errors when using floating point numbers in shallow-water models. J. Adv. Model. Earth Syst., 11, 3235-3250, doi:10.1029/2019mS001615
  4. Kitamura, Y. and S. Nishizawa, 2019: Estimation of energy dissipation caused by odd order difference schemes for an unstable planetary boundary layer. Atmos. Sci. Lett., 20, e905, doi:10.1002/asl.905
  5. Adachi, S. A., S. Nishizawa, K. Ando, T. Yamaura, R. Yoshida, H. Yashiro, Y. Kajikawa, and H. Tomita, 2019: An evaluation method for uncertainties in regional climate projections. Atmos. Sci. Lett., 20, e877, doi:10.1002/asl.877
  6. Yoshida, R., S. Nishizawa, H. Yashiro, S. A. Adachi, T. Yamaura, H. Tomita, and Y. Kajikawa, 2019: Maintenance condition of back-building squall-line in a numerical simulation of a heavy rainfall event in July 2010 in Western Japan, Atmos. Sci. Lett., 20, e880, doi:10.1002/asl.880
  7. Nishizawa, S. and Y. Kitamura, 2018: A surface flux scheme based on the Monin-Obukhov similarity for finite volume models. J. Adv. Model. Earth Syst., 10, 3159-3175, doi:10.1029/2018MS001534
  8. Nishizawa, S., S. A. Adachi, Y. Kajikawa, T. Yamaura, K. Ando, R. Yoshida, H. Yashiro, and H. Tomita, 2018: Decomposition of the large-scale atmospheric state driving downscaling: a perspective on dynamical downscaling for regional climate study. Prog. in Earth and Planetary Sci., 5, 2, doi:10.1186/s40645-017-0159-0
  9. Honda, T., T. Miyoshi, G.-Y. Lien, S. Nishizawa, R. Yoshida, S. A. Adachi, K. Terasaki, K. Okamoto, H. Tomita, and K. Bessho, 2018: Assimilating all-sky Himawari-8 satellite infrared radiances: A case of Typhoon Soudelor (2015). Mon. Wea. Rev., 146, 213-229, doi:10.1175/MWR-D-16-0357.1
  10. Adachi, S. A., S. Nishizawa, R. Yoshida, T. Yamaura, K. Ando, H. Yashiro, Y. Kajikawa, and H. Tomita, 2017: Contributions of changes in climatology and perturbation and the resulting nonlinearity to regional climate change. Nat. Commun., 8, 2224, doi:10.1038/s41467-017-02360-z
  11. Liao, J., B. Gerofi, G. Yuan Lien, T. Miyoshi, S. Nishizawa, H. Tomita, W. Keng Liao, A. Choudhary, and Y. Ishikawa, 2017: A flexible I/O arbitration framework for netCDF-based big data processing workflows on high-end supercomputers. Concurrency-Pract. Exp., 29, e4204, doi:10.1002/cpe.4161
  12. Tokutake, H., H. Hiraguri, and S. Nishizawa, 2017: Exploration of wind structure on Mars using an airplane and flight feasibility study. Trans. Japan Soc. Aero. Space Sci, 60, 212-220, doi:10.2322/tjsass.60.212
  13. Yoshida, R., S. Nishizawa, H. Yashiro, S. A. Adachi, Y. Sato, T. Yamaura, and H. Tomita, 2017: CONeP: A cost-effective online nesting procedure for regional atmospheric models. Parallel Computing, 65, 21-33, doi:10.1016/j.parco.2017.04.004
  14. Lien, G.-Y., T. Miyoshi, S. Nishizawa, R. Yoshida, H. Yashiro, S. A. Adachi, T. Yamaura, and H. Tomita, 2017: The near-real-time SCALE-LETKF system: A case of the September 2015 Kanto-Tohoku heavy rainfall. SOLA, 13, 1-6, doi:10.2151/sola.2017-001
  15. Nishizawa, S., M. Odaka, Y. O. Takahashi, K. Sugiyama, K. Nakajima, M. Ishiwatari, S. Takehiro, H. Yashiro, Y. Sato, H. Tomita, and Y.-Y. Hayashi, 2016: Martian dust devil statistics from high-resolution large-eddy simulations. Geophys. Res. Lett., 43, 4180–4188, doi:10.1002/2016GL068896
  16. Spiga, A., E. Barth, Z. Gu, F. Hoffmann, J. Ito, B. Jemmett-Smith, M. Klose, S. Nishizawa, S. Raasch, S. Rafkin, T. Takemi, D. Tyler, and Wei Wei, 2016: Large-eddy simulations of dust devils and convective vortices. Space Sci. Rev., 203, 245-275, doi:10.1007/s11214-016-0284-x
  17. Miyoshi, T., G.-Y. L., S. Satoh, T. Ushio, K. Bessho, H. Tomita, S. Nishizawa, R. Yoshida, S. A. Adachi, J. Liao, B. Gerofi, Y. Ishikawa, M. Kunii, J. Ruiz, Y. Maejima, S. Otsuka, M. Otsuka, K. Okamoto, and H. Seko, 2016: "Big data assimilation" toward post-petascale severe weather prediction: an overview and progress. Proc. IEEE, 104, 2155-2179, doi:10.1109/JPROC.2016.2602560
  18. Yamashita, T., M. Odaka, K. Sugiyama, K. Nakajima, M. Ishiwatari, S. Nishizawa, Y. Takahashi, and Y. Hayashi, 2016: A numerical study on convection of a condensing CO2 atmosphere under early Mars like conditions. J. Atmos. Sci., 73, 4151-4169, doi:10.1175/JAS-D-15-0132.1
  19. Nishizawa, S., H. Yashiro, Y. Sato, Y. Miyamoto, and H. Tomita, 2015: Influence of grid aspect ratio on planetary boundary layer turbulence in large-eddy simulations. Geosci. Model Dev., 8, 3393-3419, doi:10.5194/gmd-8-3393-2015
  20. Sato, Y., S. Nishizawa, H. Yashiro, Y. Miyamoto, Y. Kajikawa, and H. Tomita, 2015: Impacts of cloud microphysics on trade wind cumulus: which cloud microphysics processes contribute to the diversity in a large eddy simulation? Prog. in Earth and Planetary Sci., 2, 23, doi:10.1186/s40645-015-0053-6
  21. Sato, Y., Y. Miyamoto, S. Nishizawa, H. Yashiro, Y. Kajikawa, R. Yoshida, T. Yamaura, and H. Tomita, 2015: Horizontal distance of each cumulus and cloud broadening distance determine cloud cover. SOLA, 11, 75-79, doi:10.2151/sola.2015-019
  22. Miyamoto, Y., J. Ito, S. Nishizawa, and H. Tomita, 2015: A linear thermal stability analysis of discretized fluid equations. Theor. Comput. Fluid Dyn., 29, 155-169, doi:10.1007/s00162-051-0345-x
  23. Sato Y., S. Nishizawa, H. Yashiro, Y. Miyamoto, and H. Tomita, 2014: Potential of retrieving shallow-cloud life cycle from future generation satellite observations through cloud evolution diagrams: A suggestion from a large eddy simulation. SOLA, 10, 10-14, doi:10.2151/sola.2014-003
  24. Ishiwatari, M., E. Toyoda, Y. Morikawa, S. Takehiro, Y. Sasaki, S. Nishizawa, M. Odaka, N. Otobe, Y. O. Takahashi, K. Nakajima, T. Horinouchi, M. Shiotani, Y.-Y. Hayashi, and Gtool development group, 2012: “Gtool5”: a Fortran90 library of input/output interfaces for self-descriptive multi-dimensional numerical data. Geoscientific Model Devel., 5, 449-455, doi:10.5194/gmd-5-449-2012
  25. Sugiyama, K., N. Nakajima, M. Odaka, M. Ishiwatari, K. Kuramoto, Y. Morikawa, S. Nishizawa, Y. O. Takahashi, and Y.-Y. Hayashi, 2011: Intermittent cumulonimbus activity breaking the three-layer cloud structure of Jupiter. Geophys. Res. Letter, 38, L13201, doi:10.1029/2011GL047878
  26. Horinouchi T., S. Nishizawa, C. Watanabe, A. Tomobayashi, S. Otsuka, T. Koshiro, Y.-Y. Hayashi, and GFD Dennou Club, 2010: Gfdnavi, web-based data and knowledge server software for geophysical fluid sciences, Part I: Rationales, stand-alone features, and supporting knowledge documentation linked to data. In Yoshikawa, M., et al. (eds.) DASFAA 2010, LNCS, 6193, 93-104, doi:10.1007/978-3-642-14589-6_10
  27. Nishizawa S., T. Horinouchi, C. Watanabe, Y. Isamoto, A. Tomobayashi, S. Otsuka, and GFD Dennou Club, 2010: Gfdnavi, web-based data and knowledge server software for geophysical fluid sciences, Part II: RESTful web services and object-oriented programming interface. In Yoshikawa, M., et al. (eds.) DASFAA 2010, LNCS, 6193, 105-116, doi:10.1007/978-3-642-14589-6_11
  28. Kohma M., S. Nishizawa and S. Yoden, 2010: Classification of polar-night jet oscillations and their relationship to fast and slow variations in a global mechanistic circulation model of the stratosphere and troposphere. J. Climate, 23, 6438-6444, doi:10.1175/2010JCLI3458.1
  29. Hayashi Y.-Y., S. Nishizawa, S. Takehiro, M. Yamada, K. Ishioka, and S. Yoden, 2007: Rossby waves and jets in a two-dimensional decaying turbulence on a rotating sphere. J. Atmos. Sci., 64, 4246-4269, doi:10.1175/2007JAS2209.1
  30. Nishizawa S. and S. Yoden, 2005: Distribution functions of a spurious trend in a finite length data set with natural variability: Statistical considerations and a numerical experiment with a global circulation model. J. Geophys. Res., 110, D12105, doi:10.1029/2004JD005714
  31. Nishizawa S. and S. Yoden, 2004: A Parameter sweep experiment on topographic effects on the annular variability. J. Met. Soc. Japan, 82, 879-893, doi:10.2151/jmsj.2004.879

国際会議等発表リスト

クリックで展開
  1. Nishizawa, S., S. A. Adachi, and H. Tomita: Effect of sub-meso scale topography on precipitation, WS on particle-based modeling of cloud microphysics 2018, Kobe, Japan, 19-20 Nov, 2018
  2. Nishizawa, S. and Y. Kitamura: Improvement of the surface flux scheme in finite volume models, AOGS 15th Annual Meeting, Hawaii, USA, 3-8 Jun, 2018
  3. Nishizawa, S., S. A. Adachi, Y. Kajikawa, T. Yamaura, K. Ando, R. Yoshida, H. Yashiro, and H. Tomita: Decomposition of the large-scale atmospheric state driving downscaling, The 4th International Workshop on Nonhydrostatic Models, Hakone, Japan, 30 Nov - 1 Dec, 2016
  4. Nishizawa, S., M. Odaka, Y. O. Takahashi, K. Sugiyama, K. Nakajima, M. Ishiwatari, S. Takehiro, H. Yashiro, H. Tomita, and Y.-Y. Hayashi: High resolution large eddy simulation on Martian planetary boundary layer, Japan Geoscience Union Meeting 2016: International Session, Chiba, Japan, 22-26 May, 2016 (Invited)
  5. Nishizawa, S., H. Yashiro, Y. Sato, Y. Miyamoto, R. Yoshida, T. Yamaura, S. A. Adachi, Y. Kajikawa, and H. Tomita: High-resolution modeling and big data analysis at RIKEN AICS, 4th ENES Workshop on High Performance Computing for Climate and Weather, Toulouse, France, 6-7 Apr, 2016 (Invited)
  6. Nishizawa, S.: Research and development of a meteorological simulation model for future meteorological simulations. International WS: Issues in downscaling of climate change projection, Tsukuba, Japan, 5-7 Oct, 2015
  7. Nishizawa, S., H. Yashiro, Y. Sato, T. Yamaura, S. A. Adachi, R. Yoshida, H. Tomita and Team SCALE: High resolution LES experiment on Martian PBL, Japanese-French model studies of planetary atmospheres, Kobe, Japan, 11-15 May, 2015
  8. Nishizawa, S., H. Yashiro, Y. Sato, T. Yamaura, S. A. Adachi, R. Yoshida, H. Tomita and Team SCALE: Our model development activity in RIKEN AICS -introduction of SCALE and SCALE-LES-, Japanese-French model studies of planetary atmospheres, Kobe, Japan, 11-15 May, 2015
  9. Nishizawa S., H. Yashiro, Y. Sato, T. Yamaura, S. A. Adachi, ryuji Yoshida, Hirofumi Tomita, and Team SCALE: Our activity for next generation meteorological simulations in future HPC systems, Joint Workshop of 6th International Workshop on Global Cloud Resolving Modeling and 3rd International Workshop on Nonhydrostatic Numerical Models, Kobe, Japan, 24-26 Sep, 2014
  10. Nishizawa S., H. Yashiro, M. Odaka, Y. Takahashi, Y. Hayashi, H. Tomita, S. Takehiro, M. Ishiwatari, K. Nakajima, Y. Sato, K. Sugiyama: High-resolution large-eddy simulation of the Martian planetary boundary layer, AOGS 11th Annual Meeting, Sapporo, Japan, 28 Jul - 1 Aug, 2014
  11. Nishizawa, S., H. Yashiro, Y. Sato, Y. Miyamoto and H. Tomita: Research and development of common basic library and environment for weather and climate prediction models, 15th International Specialist Meeting on the next-generation of climate models and knowledge discoveries through the extreme high-performance simulations and big data, Berkeley CA, USA, 20-22 Mar, 2013
  12. Nishizawa S., T. Horinouchi: Gfdnavi: its design and implementation with Ajax and Ruby-On-Rails. GO-ESSP 2008, Seattle, USA, 17-19 Sep, 2008
  13. Nishizawa S.: Experimental development of a unified data base and decision support system for prevention and mitigation of meteorological disasters. The 1st international workshop on prevention and mitigation of meteorological disasters in Southeast Asia, Kyoto, Japan, 3-5 Mar, 2008
  14. Nishizawa S.: Detection of trends in occurrence of rare events: Theory and application to extremely high temperature in the stratosphere. IUGG 2007, Perugia, Italy, 2-13 Jul, 2007
  15. Nishizawa S., S. Yoden, and T. Nozawa: Distribution function of a spurious trend and detectability of the true trend. ESF-JSPS Frontire Science Conference for Young Researchers 2006 Climate Change-, Nynashamn, Sweden, 24-29 Jun, 2006
  16. Nishizawa S. and S. Yoden: Distribution functions of a spurious trend in finite length dataset with natural variability: statistical considerations and a numerical experiment with a global circulation model. AMS 13th Conference on Middle Atmosphere, Cambridge, USA, 13-17 Jun, 2005
  17. Nishizawa S. and S. Yoden: Temperature trends estimated with finite-length datasets and evaluation of their significance with some idealized models. 3rd SPARC General Assembly, Victoria, Canada, 1-6 Aug, 2004
  18. Nishizawa S., S. Yoden, and A. Kitoh: Topographic effects on annular variability in a coupled atmosphere-ocean GCM. IUGG 2003, Sapporo, Japan, 30 Jun-11 Jul, 2003
  19. Nishizawa S. and S. Yoden: A numerical experiment on the effect of topography on annular variability. International Symposium on Stratospheric Variations and Climate, Fukuoka, Japan, 12-15 Nov, 2002