Hisashi YASHIRO (八代 尚)

Research Scientist, RIKEN AICS, Japan

• Application development Team, FLAGSHIP2020 project
• Computational Climate Science Research Team

Contact Address

Advanced Institute for Computational Science, RIKEN,
7-1-26, Minatojima-minami-machi, Chuo-ku, Kobe, Hyogo, 650-0047, Japan
Tel: 078-940-5731 Fax: 078-304-4972
Mail: h.yashiro@riken.jp

Education

• 2007: Ph.D, Dept. Geophysics, Graduate School of Science, Tohoku Univ., Japan
• 2003: M.S., Dept. Geophysics, Graduate School of Science, Tohoku Univ., Japan
• 2001: B.S., Dept. Geophysics, Graduate School of Science, Tohoku Univ., Japan

Employment

• 2012-Present: Research Scientist, RIKEN Advanced Institute for Computational Science, Japan
• 2011-2012: Postdoctoral Researcher, RIKEN Advanced Institute for Computational Science, Japan
• 2008-2011: Postdoctoral Researcher, Frontier Research Center for Global Change, Japan Agency for Marine-Earth Science and Technology(JAMSTEC), Japan
• 2007-2008: Postdoctoral Researcher, Center for Atmospheric and Oceanic Studies(CAOS), Tohoku Univ., Japan

Research Interests

• Spatio-tempolral variation and global budget of 'Indirect Greenhouse Gases', such as carbon monoxide(CO), hydrogen, and NMVOCs
• Model simulation of atmospheric chemistry and chemistry-climate interactions
• Development of global/regional climate model towards to Exa-scale HPC system

Publications

Paper

• Miyakawa, T., H. Yashiro, T. Suzuki, H. Tatebe, and M. Satoh (2017): A Madden‐Julian Oscillation event remotely accelerates ocean upwelling to abruptly terminate the 1997/1998 super El Niño, Geophys. Res. Lett., 44, doi:10.1002/2017GL074683.
• Satoh, M., H. Tomita, H. Yashiro, Y. Kajikawa, Y. Miyamoto, T. Yamaura, T. Miyakawa, M. Nakano, C. Kodama, A. T. Noda, T. Nasuno, Y. Yamada, and Y. Fukutomi (2017): Outcomes and challenges of global high-resolution non-hydrostatic atmospheric simulations using the K computer, Progress in Earth and Planetary Science, 4, 13, doi:10.1186/s40645-017-0127-8.
• 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, Volume 65, Pages 21–31, doi:10.1016/j.parco.2017.04.004.
• Goto, D., Y. Sato, H. Yashiro, K. Suzuki, and T. Nakajima (2017): Validation of high-resolution aerosol optical thickness simulated by a global non-hydrostatic model against remote sensing measurements, AIP Conference Proceedings, 1810, 100002. doi:10.1063/1.4975557.
• Ngoc Trieu, T. T., D. Goto, H. Yashiro, R. Murata, K. Sudo, H. Tomita, M. Satoh, and T. Nakajima (2017): Evaluation of summertime surface ozone in Kanto area of Japan using a semi-regional model and observation, Atmospheric Environment, doi:10.1016/j.atmosenv.2017.01.030.
• 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., Scientific Online Letters on the Atmosphere, 13, 1-6, doi:10.2151/sola.2017-001.
• Muranushi, T., H. Hotta, J. Makino, S. Nishizawa, H. Tomita, K. Nitadori, M. Iwasawa, N. Hosono, Y. Maruyama, H. Inoue, H. Yashiro, Y. Nakamura (2016): Simulations of Below-Ground Dynamics of Fungi: 1.184 Pflops Attained by Automated Generation and Autotuning of Temporal Blocking Codes, SC16: International Conference for High Performance Computing, Networking, Storage and Analysis, Salt Lake City, UT, 2016, pp.23-33, doi:10.1109/SC.2016.2.
• Yashiro, H., Y. Kajikawa, Y. Miyamoto, T. Yamaura, R. Yoshida, and H. Tomita (2016): Resolution Dependence of the Diurnal Cycle of Precipitation Simulated by a Global Cloud-System Resolving Model, Scientific Online Letters on the Atmosphere, Vol. 12, P. 272-276 , doi:10.2151/sola.2016-053.
• Muranushi T., S. Nishizawa, H. Tomita, K. Nitadori, M. Iwasawa, Y. Maruyama, H. Yashiro, Y. Nakamura, H. Hotta, J. Makino, N. Hosono, H. Inoue. (2016): Automatic Generation of Efficient Codes from Mathematical Descriptions of Stencil Computation, FHPC 2016 Proceedings of the 5th International Workshop on Functional High-Performance Computing, Pages 17-22, doi:10.1145/2975991.2975994.
• Miyamoto, Y., T. Yamaura, R. Yoshida, H. Yashiro, H. Tomita, and Y. Kajikawa (2016): Precursors of deep moist convection in a subkilometer global simulation, Journal of Geophysical Research Atmospheres, doi:10.1002/2016JD024965.
• Yashiro, H., K. Terasaki, T. Miyoshi, and H. Tomita (2016): Performance evaluation of a throughput-aware framework for ensemble data assimilation: the case of NICAM-LETKF, Geoscientific Model Development, Volume 9, issue 7, Page 2293-2300, doi:10.5194/gmd-9-2293-2016.
• Yashiro, H., M. Terai, R. Yoshida, S. Iga, K. Minami, and H. Tomita (2016): Performance Analysis and Optimization of Nonhydrostatic ICosahedral Atmospheric Model (NICAM) on the K Computer and TSUBAME2.5, Association for Computing Machinery, Article No. 3 8pages, doi:10.1145/2929908.2929911.
• Kajikawa, Y., Y. Miyamoto, R. Yoshida, T. Yamaura, H. Yashiro, H. Tomita (2016): Resolution dependence of deep convections in a global simulation from over 10-kilometer to sub-kilometer grid spacing, Progress in Earth and Planetary Science, 3:16, doi:10.1186/s40645-016-0094-5.
• Sato, Y., H. Miura, H. Yashiro, D. Goto, T. Takemura, H. Tomita, and T. Nakajima (2016): Unrealistically pristine air in the Arctic produced by current global scale models, Scientific Reports, 6, Article number: 26561, doi:10.1038/srep26561.
• 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, Geophysical Research Letters, Volume 43, Issue 9, Pages 4180–4188, doi:10.1002/2016GL068896.
• Sato, Y., S. Nishizawa, H. Yashiro, Y. Miyamoto, Y. Kajikawa, and H. Tomita (2015b), Impacts of cloud microphysics on trade wind cumulus: which cloud microphysics processes contribute to the diversity in a large eddy simulation?, Progress in Earth and Planetary Science, 2(1), 1-16, doi:10.1186/s40645-015-0053-6.
• 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, Geoscientific Model Development, 8(10), 3393-3419, doi:10.5194/gmd-8-3393-2015.
• Leinonen, J., M. D. Lebsock, S. Tanelli, K. Suzuki, H. Yashiro, and Y. Miyamoto (2015): Performance assessment of a triple-frequency spaceborne cloud-precipitation radar concept using a global cloud-resolving model, Atmospheric Measurement Techniques, 8(8), 3493-3517, doi:10.5194/amt-8-3493-2015.
• Miyamoto, Y., R. Yoshida, T. Yamaura, H. Yashiro, H. Tomita, and Y. Kajikawa (2015): Does convection vary in different cloud disturbances?, Atmospheric Science Letters, 16(3), 305-309, doi:10.1002/asl2.558.
• Sato, Y., Y. Miyamoto, S. Nishizawa, H. Yashiro, Y. Kajikawa, R. Yoshida, T. Yamaura, and H. Tomita (2015a): Horizontal Distance of Each Cumulus and Cloud Broadening Distance Determine Cloud Cover, Sola, 11, 75-79, doi:10.2151/sola.2015-019.
• Terai, M., H. Yashiro, K. Sakamoto, S. Iga, H. Tomita, M. Satoh, and K. Minami (2014): Performance optimization and evaluation of a global climate application using a 440m horizontal mesh on the K computer, SC14: The International Conference for High Performance Computing, Networking, Storage and Analysis, New Orleans, pp.251–261, November 2014.
• Satoh, M., et al. (2014): The Non-hydrostatic Icosahedral Atmospheric Model: description and development, Progress in Earth and Planetary Science, 1(1), 1-32, doi:10.1186/s40645-014-0018-1.
• Kodama, C., M. Terai, A. T. Noda, Y. Yamada, M. Satoh, T. Seiki, S.-i. Iga, H. Yashiro, H. Tomita, and K. Minami (2014): Scalable rank-mapping algorithm for an icosahedral grid system on the massive parallel computer with a 3-D torus network, Parallel Computing, 40(8), 362-373, doi:10.1016/j.parco.2014.06.002.
• Miyakawa, T., M. Satoh, H. Miura, H. Tomita, H. Yashiro, A. T. Noda, Y. Yamada, C. Kodama, M. Kimoto, and K. Yoneyama (2014): Madden-Julian Oscillation prediction skill of a new-generation global model demonstrated using a supercomputer, Nature Communications, 5, doi:10.1038/ncomms4769.
• 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, doi:10.2151/sola.2014-003.
• Miyamoto, Y., Y. Kajikawa, R. Yoshida, T. Yamaura, H. Yashiro, and H. Tomita (2013): Deep moist atmospheric convection in a subkilometer global simulation, Geophysical Research Letters, 40(18), 4922-4926, doi:10.1002/grl.50944.
• Yashiro, H., K. Sudo, S. Yonemura, and M. Takigawa (2011): The impact of soil uptake on the global distribution of molecular hydrogen: chemical transport model simulation, Atmospheric Chemistry and Physics, 11(13), 6701-6719, doi:10.5194/acp-11-6701-2011.
• Yashiro, H., S. Sugawara, K. Sudo, S. Aoki, and T. Nakazawa (2009): Temporal and spatial variations of carbon monoxide over the western part of the Pacific Ocean, Journal of Geophysical Research-Atmospheres, 114, doi:10.1029/2008JD010876.

Presentation

• Yashiro, H. (2017): Recent Extreme-Scale Simulation Efforts for NICAM, ISC17 BoF "Cloud Resolving Global Earth-System Models: HPC at its Extreme": ISC High Performance, 2017 Conference, Frankfurt, Germany, June 20, 2017. (Oral)
• Yashiro, H., K.Terasaki, T.Miyoshi, H.Tomita (2017): Towards an extreme scale global data assimilation on the post-K supercomputer: development of a throughput-aware framework for ensemble data assimilation, JpGU-AGU Joint Meeting 2017, Chiba, Japan, May 22, 2017.(Invited)
• Yashiro, H. (2017): Benchmarking for weather/climate, Workshop: Understanding I/O Performance Behavior, Hamburg, Germany, Mar. 23, 2017.(Oral)
• Yashiro, H. (2016): Towards Extreme-Scale Weather/Climate Simulation: The Post K Supercomputer & Our Challenges, ISC High Performance, 2017 Conference, Frankfurt, Germany, June 21, 2017. (Oral)
• Yashiro, H., Y. Kajikawa, Y. Miyamoto, T. Yamaura, R. Yoshida, and H. Tomita (2016): Resolution dependence of the diurnal cycle of precipitation over land in the tropics simulated by a global cloud permitting model, The 4th International Workshop on Nonhydrostatic Models, Hakone, Japan, Nov. 30, 2016.(Oral)
• Yashiro, H. (2016): Towards Extreme-Scale Weather/Climate Simulation: The Post K Supercomputer & Our Challenges, ISC High Performance, 2016 Conference, Frankfurt, Germany, June 21, 2016. (Invited)
• Yashiro, H., Y. Kajikawa, Y. Miyamoto, R. Yoshida, T. Yamaura, and H. Tomita (2016): Resolution dependence of diurnal cycle of tropical precipitation in a global high-resolution simulation, Japan Geoscience Union Meeting 2016: International Session, Chiba, Japan, May 22-26, 2016. (Oral)
• Yashiro, H. (2015): Climate modeling towards exascale: the case of NICAM-LETKF, 3rd JLESC workshop, Barcelona, Spain, Jun. 29-Jul. 1, 2015. (Oral)
• Yashiro, H. (2015): A Simulation of Global Atmosphere Model NICAM on TSUBAME 2.5 Using OpenACC, GPU Technology Conference, San Jose, CA, USA, 17-20 Mar 2015. (Oral)
• Yashiro, H., M. Satoh, and H. Tomita (2014): NICAM 870m mesh simulations on the K computer and a road toward global LES, AGU Fall meeting, San Francisco, USA, 15-19 Dec 2014. (Invited)
• Yashiro, H., H. Tomita, M. Satoh (2014): Recent computational performance and scalability of NICAM: toward to the exa-scale computing, 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. (Poster)
• Yashiro, H., Y. Kajikawa, Y. Miyamoto, R. Yoshida, T. Yamaura, and H. Tomita (2014): Diurnal Cycle of the Precipitation in a Sub-kilometer Global Simulation, Asia-Oceania Geosciences Society (AOGS) 11th Annual Meeting, Sapporo, Japan, 28 July-01 Aug 2014. (Poster)
• Yashiro, H. (2014): Recent performance of NICAM on the K-computer and activities towards post-petascale computing, ECMWF Workshop on Scalability, Reading, UK, 14-15 April 2014. (Oral)
• Yashiro, H., H. Tomita and M. Satoh (2013): NICAM simulations on the K computer: recent performance and activities toward to the exascale computing, 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, March 20-22. 2013. (Oral)
• Yashiro, H. and NICAM developers (2012): NICAM.12: Recent Performance on the K Computer and Further Development toward Post Peta-scale Computing, 2012 KIAPS International Symposium, Seoul, Korea, Nov. 2012. (Invited)
• Yashiro, H., S. Sugawara, K. Sudo, M. Takigawa, S. Aoki and T. Nakazawa (2011): Observed and Modeled Variations of Carbon Monoxide over the western part of the Pacific Ocean. EGU General Assembly 2011, Vienna, Austria, 2011 (Poster)
• Yashiro, H., M. Takigawa, K. Sudo, S. Sugawara, S. Aoki and T. Nakazawa (2010): Observed and Modeled Variations of Tropospheric Molecular Hydrogen over Japan. 11th Science Conference of the International Global Atmosphere Chemistry (IGAC) Project, Halifax, Canada, 2010 (Poster)
• Yashiro, H., M. Takigawa and K. Sudo (2010): Simulation of molecular hydrogen in the troposphere using global CTM coupled with land process model. EGU General Assembly 2010, Vienna, Austria, 2010 (Poster)
• Yashiro, H., S. Sugawara, K. Sudo, M. Takigawa, S. Aoki and T. Nakazawa (2009): Observed and Modeled Variations of Tropospheric Carbon Monoxide over Japan. AGU Fall Meeting, San Francisco, USA, 2009 (Poster)
• Yashiro, H., S. Sugawara, K. Sudo, S. Aoki and T. Nakazawa (2009): Impact of anthropogenic emission on the temporal and spacial variations of atmospheric CO over Japan. 7th International Conference on Air Quality, Istanbul, Turkey, 2009 (Oral)
• Yashiro, H., S. Morimoto, S. Sugawara, K. Sudo, S. Aoki, and T. Nakazawa (2008): Concentration variations of atmospheric carbon monoxide at Japanese Antarctic station, Syowa. IGAC 10th International Conference, Annecy, France, 2008 (Poster)