Shuhei MASUDA

Profile

Shuhei MASUDA

Global Ocean Observation Research Center
Director (Principal Research Scientist)

Research Interests

  • Climate Change
  • Physical Oceanography

Address

Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
Research Institute for Global Change (RIGC)
2-15 Natsushima, Yokosuka, 237-0061, Japan

Curriculum Vitae

2001/11 Ph.D., Science, Kyoto University
2000/8～2003/6 Research Scientist , Frontier Research System for Global Change
2003/7～2009/3 Research Scientist, Frontier Research Center for Global Change
2009/4～2014/3 Team Leader (Senior Research Scientist), Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
2014/4～2019/3 Group Leader (Senior Research Scientist), Research and Development Center for Global Change, JAMSTEC
2019/4～2020/3 Director (Senior Research Scientist), Research Institute for Global Change, JAMSTEC
2020/4～ Director (Principal Research Scientist), Research Institute for Global Change, JAMSTEC

Major Publications (Peer-reviewed)

  • 51. Masuda, S., and Osafune, S. (2021), Ocean state estimations for synthesis of ocean-mixing observations, J. Oceanogr., doi:10.1007/s10872-020-00587-x
  • 50. Annie P. S. Wong et al. (2020), Argo data 1999-2019: two million temperature-salinity profiles and subsurface velocity observations from a global array of profiling floats, Frontiers in Marine Science, https://doi.org/10.3389/fmars.2020.00700.
  • 49. Mugo, R., S. Saitoh, H. Igarashi, T. Toyoda, S. Masuda, T. Awaji, Y. Ishikawa (2020), Identification of skipjack tuna (Katsuwonus pelamis) pelagic hotspots applying a satellite remote sensing-driven analysis of ecological niche factors: a short-term run, PLoS ONE, 15, 8, doi:10.1371/journal.pone.0237742.
  • 48. S. Osafune, S., S. Kouketsu, S. Masuda, N. Sugiura (2020), Dynamical ocean response controlling the eastward movement of a heat content anomaly caused by the 18.6‐year modulation of localized tidally‐induced mixing, J. Geophys. Res. -Oceans, doi:10.1029/2019JC015513.
  • 47. Masuda, S. (2020), Determining subsurface oceanic changes in the Indian sector of the Southern Ocean using Argo float data, Polar Science, 21, -, doi:10.1016/j.polar.2019.100498.
  • 46. Yosuke Fujii , Elisabeth Rémy, Hao Zuo , Peter Oke , George Halliwell , Florent Gasparin , Mounir Benkiran, Nora Loose , James Cummings , Jiping Xie , Yan Xue , Shuhei Masuda , Gregory C. Smith , Magdalena Balmaseda , Cyril Germineaud , Daniel J. Lea , Gilles Larnicol, Laurent Bertino , Antonio Bonaduce , Pierre Brasseur , Craig Donlon , Patrick Heimbach , YoungHo Kim , Villy Kourafalou , Pierre-Yves Le Traon , Matthew Martin , Shastri Paturi , Benoit Tranchant and Norihisa Usui (2019), Observing System Evaluation Based on Ocean Data Assimilation and Prediction Systems: On-Going Challenges and a Future Vision for Designing and Supporting Ocean Observational Networks, Front. Mar. Sci., doi: 10.3389/fmars.2019.00417
  • 45. Masuda, S., S. Osafune, and T. Hemmi (2018), Deep-float salinity data synthesis for deep ocean state estimation: Method and impact, Progress in Earth and Planetary Science, 5, 1, 1-8, doi:10.1186/s40645-018-0247-9.
  • 44. Yoshimi Kawai, Satoshi Osafune, Shuhei Masuda, Yoshiki Komuro (2018), Relations between salinity in the northwestern Bering Sea, the Bering Strait throughflow and sea surface height in the Arctic Ocean, J. Oceanogr., 74, 3, 239-261, DOI:10.1007/s10872-017-0453-x
  • 43. Hiromichi Igarashi, Taro Ichii, Mitsuo Sakai, Yoichi Ishikawa, Takahiro Toyoda,　Shuhei Masuda, Nozomi Sugiura, Kedarnath Mahapatra, Toshiyuki Awaji (2017), Possible link between interannual variation of neon flying squid (Ommastrephes bartramii) abundance in the North Pacific and the climate phase shift in 1998/1999, Progress in Oceanography, 150, 20-34, doi.org/10.1016/j.pocean.2015.03.008
  • 42. Takashi Mochizuki, Shuhei Masuda, Yoichi Ishikawa, and Toshiyuki Awaji (2016), Multi-year climate prediction with initialization based on 4D-Var data assimilation, Geophys. Res. Lett., 43, 8, 3903-3910, DOI: 10.1002/2016GL067895.
  • 41. Xueyuan Liu, Armin Köhl, Detlef Stammer, Shuhei Masuda, Yoichi Ishikawa, Takashi Mochizuki (2016), Impact of in-consistency between the climate model and its initial conditions on climate prediction, Clim. Dym., 9, 3, 1061-1075 DOI 10.1007/s00382-016-3194-4.
  • 40. Masuda, S., J. P. Matthews, Y. Ishikawa, T. Mochizuki, Y. Tanaka, and T. Awaji (2015), A new Approach to El Niño Prediction beyond the Spring Season, Scientific Reports, 5, 1-9, doi:10.1038/srep16782.
  • 39. Shiro Nishikawa, Yoichi Ishikawa, Shuhei Masuda,Yoshihisa Hiyoshi, Yuji Sasaki, and Hiromichi Igarashi (2015), Argo data assimilation and its effect on climate state estimation and forecasting in the western North Pacific using a coupled model, Journal of Geophysical Research, 120, 4, 2636-2654, doi: 10.1002/2014JC010095.
  • 38. A. Storto, S. Masina, M. Balmaseda, S. Guinehut, Y. Xue, T. Szekely, I. Fukumori, G. Forget, Y.-S. Chang, S. A. Good, A. Köhl, G. Vernieres, N. Ferry, K. A. Peterson, D. Behringer, M. Ishii, S. Masuda, Y. Fujii, T. Toyoda, Y. Yin, M. Valdivieso, B. Barnier, T. Boyer, T. Lee, J. Gourrion, O. Wang, P. Heimback, A. Rosati, R. Kovach, F. Hernandez, M. J. Martin, M. Kamachi, T. Kuragano, K. Mogensen, O. Alves, K. Haines, X. Wang (2015), Steric sea level variability (1993–2010) in an ensemble of ocean reanalyses and objective analyses, Clim. Dyn.,45, 10.1007/s00382-015-2554-9, 1-21.
  • 37. Takahiro Toyoda, Yosuke Fujii, Tsurane Kuragano, Masafumi Kamachi, Yoichi Ishikawa, Shuhei Masuda, Kanako Sato, Toshiyuki Awaji, Fabrice Hernandez, Nicolas Ferry, Stephanie Guinehut, Matthew J. Martin, K. Andrew Peterson, Simon A. Good, Maria Valdivieso, Keith Haines, Andrea Storto, Simona Masina, Armin Köhl, Hao Zuo, Magdalena Balmaseda, Yonghong Yin, Li Shi, Oscar Alves, Gregory Smith, You‑Soon Chang, Guillaume Vernieres, Xiaochun Wang, Gael Forget, Patrick Heimbach, Ou Wang, Ichiro Fukumori, Tong Lee (2015), Intercomparison and validation of the mixed layer depth fields of global ocean syntheses, Clim. Dyn., 49, 3, 753-773, DOI 10.1007/s00382-015-2637-7.
  • 36. H. Nishikawa, T. Toyoda, S. Masuda, Y. Ishikawa, Y. Sasaki, H. Igarashi, M. Sakai, M. Seito, and T. Awaji (2015), Wind induced stock variation of the neon flying squid (Ommastrephes bartramii) winter-spring cohort in the subtropical North Pacific Ocean, Fish. Oceanogr., 24(3): 229-241.
  • 35. Balmaseda, M. A., F. Hernandez, A. Storto, M. D. Palmer, O. Alves, L. Shi, G. C. Smith, T. Toyoda, M. Valdivieso, B. Barnier, D. Behringer, T. Boyer, Y-S. Chang, G. A. Chepurin, N. Ferry, G. Forget, Y. Fujii, S. Good, S. Guinehut, K. Haines, Y. Ishikawa, S. Keeley, A. Köhl, T. Lee, M. Martin, S. Masina, S. Masuda, B. Meyssignac, K. Mogensen, L. Parent, K. A. Peterson, Y. M. Tang, Y. Yin, G. Vernieres, X. Wang, J. Waters, R. Wedd , O. Wang, Y. Xue, M. Chevallier, J-F. Lemieux, F. Dupont, T. Kuragano, M. Kamachi, T. Awaji, A. Caltabiano, K. Wilmer-Becker, F. Gaillard (2015) The Ocean Reanalyses Intercomparison Project (ORA-IP), Journal of Operational Oceanography, Vol. 8, No. S1, s80–s97, http://dx.doi.org/10.1080/1755876X.2015.1022329.
  • 34. Fujii Y., Cummings J., Xue Y., Schiller A., Lee T. , Balmaseda M. A. , Remy E., Masuda S., Brassington G., Alves O., Cornuelle B., Martin M., Oke P., Smith G., Yang X (2015), . Evaluation of the Tropical Pacific Observing System from the ocean data assimilation perspective, Q.J.R.Meteorol.Soc., 141, 2481-2496, DOI:10.1002/qj.2579.
  • 33. Osafune, S., S. Masuda, N. Sugiura, T. Doi (2015) Evaluation of the applicability of the Estimated Ocean State for Climate Research (ESTOC) dataset、Geophys. Res. Lett., 42, 12, 4903–4911.
  • 32. Takahiro Toyoda, Yosuke Fujii, Tsurane Kuragano, Naohisa Kosugi, Daisuke Sasano, Masafumi Kamachi, Yoichi Ishikawa, Shuhei Masuda, Kanako Sato, Toshiyuki Awaji, Fabrice Hernandez, Nicolas Ferry, Stephanie Guinehut, Matthew Martin, K. Andrew Peterson, Simon A. Good, Maria Valdivieso, Keith Haines, Andrea Storto, Simona Masina, Armin Köhl,　 Yonghong Yin, Li Shi, Oscar Alves, Gregory Smith, You‑Soon Chang, Guillaume Vernieres, Xiaochun Wang, Gael Forget, Patrick Heimbach, Ou Wang, Ichiro Fukumori, Tong Lee,　Hao Zuo, Magdalena Balmaseda (2015), Interannual‑decadal variability of wintertime mixed layer depths in the North Pacific detected by an ensemble of ocean syntheses, Clim. Dyn., 49, 3,891-907 , DOI 10.1007/s00382-015-2762-3.
  • 31. M. D. Palmer, C. D. Roberts, M. Balmaseda, Y.‑S. Chang, G. Chepurin, N. Ferry, Y. Fujii, S. A. Good, S. Guinehut, K. Haines, F. Hernandez, A. Köhl, T. Lee, M. J. Martin, S. Masina, S. Masuda, K. A. Peterson, A. Storto, T. Toyoda, M. Valdivieso, G. Vernieres, O. Wang, Y. Xue (2015), Ocean heat content variability and change in an ensemble of ocean reanalyses, Clim. Dyn., 45, 1-22, DOI 10.1007/s00382-015-2801-0.
  • 30. Shi L., Alves O., Wedd R., Balmaseda M. A., Chang Y., Chepurin G., Ferry N., Fujii Y., Gaillard F., Good S. A., Guinehut S., Haines K., Hernandez F., Lee T., Palmer M., Peterson D., Masuda S., Storto A., Toyoda T., Valdivieso M., Vernieres G., Wang X. , Yin Y (2015), An Assessment of Upper Ocean Salinity Content from the Ocean Reanalyses Inter-Comparison Project (ORA-IP), Climate Dynamics, 45, 1-21, DOI 10.1007/s00382-015-2868-7
  • 29. Takahiro Toyoda, Nozomi Sugiura, Shuhei Masuda, Yuji Sasaki, Hiromichi Igarashi, Yoichi Ishikawa, Takaki Hatayama, Takeshi Kawano, Yoshimi Kawai, Shinya Kouketsu, Katsuro Katsumata, Hiroshi Uchida, Toshimasa Doi, Masao Fukasawa and Toshiyuki Awaji (2015), An improved simulation of the deep Pacific Ocean using optimally-estimated vertical diffusivity based on the Green's function method, Geophys. Res. Lett., 42, 9916-9924, DOI: 10.1002/2015GL065940.
  • 28. Toshimasa Doi, Satoshi Osafune, Nozomi Sugiura, Shinya Kouketsu, Akihiko Murata, Shuhei Masuda, and Takahiro Toyoda (2015), Multi-decadal change in the dissolved inorganic carbon in a long-term ocean state estimation, Journal of Advances in Modeling Earth Systems, 7, 4, 1885-1990, DOI:10.1002/2015MS000462.
  • 27. Masuda, S. (2014), An Observing System Simulation Experiment for the Western North Pacific Region, The Scientific World Journal, vol. 2014, Article ID 314134, 6 pages, doi:10.1155/2014/314134.
  • 26. Masuda, S., N. Sugiura, S. Osafune, and T. Doi (2014), Improvement of Ocean State Estimation by Assimilating Mapped Argo Drift Data, The Scientific World Journal, vol. 2014, Article ID 975618, 6 pages, 2014. doi:10.1155/2014/975618.
  • 25. Masuda, S., S. Hosoda (2014), Effective Design of Profiling Float Network for Oceanic Heat-content Monitoring, The Scientific World Journal, vol. 2014, Article ID 340518, 6 pages, 2014. doi:10.1155/2014/340518.
  • 24. Sugiura, Nozomi., Shuhei Masuda, Yosuke Fujii, Masafumi Kamachi, Yoichi Ishikawa, Toshiyuki Awaji (2014), A Framework for Interpreting Regularized State Estimation. Mon. Wea. Rev., 142, 386–400, doi: http://dx.doi.org/10.1175/MWR-D-12-00231.1
  • 23. Kato, Yoshihiko, Mitsuo Sakai, Masachika Masujima, Makoto Okazaki, Hiromichi Igarashi, Shuhei Masuda, and Toshiyuki Awaji (2014), Effects of hydrographic conditions on the transport of neon flying squid Ommastrephes bartramii larvae in the North Pacific Ocean, Hidrobiológica, 24 (1), 33-38.
  • 22. Osafune, S, S. Masuda, and N. Sugiura (2014) Role of the oceanic bridge in linking the 18.6-year modulation of tidal mixing and long-term SST change in the North Pacific, Geophys. Res. Lett., 41,20, 7284-7290, 2014GL061737
  • 21. Sciller, A., L. Tong, S. Masuda (2013), Methods and Applications of Ocean Synthesis in Climate Research, Ocean Circulation & Climate -A 21st century perspective, International Geophysics, 103, 581-601, ed. Gerold Siedler, Stephen M. Griffies, John Gould, John A. Church, Elsevier, Academic Press, doi:10.1016/B978-0-12-391851-2.00022-2
  • 20. Katsuro Katsumata and Shuhei Masuda (2013), Variability in Southern Hemisphere Ocean Circulation from the 1980s to the 2000s, Journal of Physical Oceanography, 43, 9, 1981-2007, doi:10.1175/JPO-D-12-0209.1.
  • 19. Katsuro Katsumata, Bernadette M. Sloyan, and Shuhei Masuda (2013), Diapycnal and isopycnal transports in the Southern Ocean estimated by a box inverse model, Journal of Physical Oceanography, 43, 11, 2270-2287, doi: 10.1175/JPO-D-12-0210.1.
  • 18. Toyoda, T., T. Awaji, S. Masuda, N. Sugiura, H. Igarashi, Y. Sasaki, Y. Hiyoshi, Y. Ishikawa, S.-I. Saitoh, S. Yoon, T. In, and M.J. Kishi (2013), Improved state estimations of lower trophic ecosystems in the global ocean based on a Green's function approach, Progress in Oceanography, 119, 90-107, doi: 10.1016/j.pocean.2013.08.008.
  • 17. Masuda, S., T. Awaji, N. Sugiura, J. P.Matthews, T. Toyoda, Y.Kawai, T. Doi, S. Kouketsu, H. Igarashi, K. Katsumata, H. Uchida, T. Kawano, M. Fukasawa (2010), Simulated Rapid Warming of Abyssal North Pacific Waters, Science, 329, 319-322, DOI, 10.1126/science.1188703.
  • 16. Toyoda, T., T. Awaji, N. Sugiura, S. Masuda, H. Igarashi, Y. Sasaki, Y. Hiyoshi, Y. Ishikawa, T. Mochizuki, T. T. Sakamoto, H. Takebe, Y. Komuro, T. Suzuki, T. Nishimura, M. Mori, Y. Chikamoto, S. Yasunaka, Y. Imada, M. Arai, M. Watanabe, H. Shiogama, T. Nozawa, A. Hasegawa, M. Ishii, and M. Kimoto (2011), Impact of the Assimilation of Sea Ice Concentration Data on an Atmosphere-Ocean-Sea Ice Coupled Simulation of the Arctic Ocean Climate, SOLA, 7, 037-040, doi:10.2151/sola.2011-010.
  • 15. Shinya Kouketsu, Toshimasa Doi, Takeshi Kawano, Shuhei Masuda, Nozomi Sugiura, Takahiro Toyoda, Hiromichi Igarashi, Yoshimi Kawai, Katsuro Katsumata, Hiroshi Uchida, Masao Fukasawa, and Toshiyuki Awaji (2011), Deep ocean heat content changes estimated from observation and reanalysis product and their influence on sea level change, J. Geophys. Res., 116, C03012, doi:10.1029/2010JC006464.
  • 14. Matthews, J. P., H. Aiki, S. Masuda, T. Awaji and Y. Ishikawa (2011), Monsoon Regulation of Lombok Strait internal waves, Journal of Geophysical Research, 116, C05007, doi:10.1029/2010JC006403.
  • 13. Toyoda, T., T. Awaji, S. Masuda, N. Sugiura, H. Igarashi, T. Mochizuki, Y. Ishikawa (2010), Interannual variability of North Pacific eastern subtropical mode water formation in the 1990s derived from a 4-dimensional variational ocean data assimilation experiment, Dyn. Atmos. Oceans, doi:10.1016/j.dynatmoce.2010.09.001.
  • 12. Masuda, S., T. Awaji, T. Toyoda, Y. Shikama, and Y. Ishikawa (2009), Temporal evolution of the equatorial thermocline associated with the 1991–2006 ENSO, J. Geophys. Res., 114, C03015, doi:10.1029/2008JC004953.
  • 11. Ishikawa, Y., T. Awaji, T. Toyoda, T. In, K. Nishina, T. Nakayama, S. Shima, and S. Masuda (2009), High-resolution synthetic monitoring by a 4-dimensional variational data assimilation system in the northwestern North Pacific, J. Mar. Sys., 78, 237-248.
  • 10. Nozomi Sugiura, Toshiyuki Awaji, Shuhei Masuda, Takahiro Toyoda, Hiromichi Igarashi, Yoichi Ishikawa, Masayoshi Ishii, and Masahide Kimoto (2009), Potential for decadal predictability in the North Pacific region, Geophy. Res. Lett., VOL. 36, L20701, doi:10.1029/2009GL039787.
  • 9. Sugiura, N., T. Awaji, S. Masuda, T. Mochizuki, T. Toyoda, T. Miyama, H. Igarashi, and Y. Ishikawa (2008), Development of a four-dimensional variational coupled data assimilation system for enhanced analysis and prediction of seasonal to interannual climate variations, J. Geophys. Res., 113, C10017, doi:10.1029/2008JC004741.
  • 8. Masuda, S., T. Awaji, N. Sugiura, T. Toyoda, Y. Ishikawa, and K. Horiuchi (2006), Interannual Variability of Temperature Inversions in the Subarctic North Pacific, Geophy. Res. Lett., 33, L24610, doi:10.1029/2006GL027865.
  • 7. Mochizuki, T., H. Igarashi, N. Sugiura, S. Masuda, N. Ishida, and T. Awaji (2006), Improved Coupled GCM Climatologies for Summer Monsoon Onset Studies over Southeast Asia, Geophy. Res. Lett., 34, L01706, doi:10.1029/2006GL027861.
  • 6. Masuda, S., T. Awaji, N. Sugiura, Y. Ishikawa, K. Baba, K. Horiuchi, and N. Komori (2003), Improved estimates of the dynamical state of the North Pacific Ocean from a 4 dimensional variational data assimilation, Geophys. Res. Lett., 30, 16, 1868, doi:10.1029/2003GL017604.
  • 5. Awaji, T., S. Masuda, Y. Ishikawa, N. Sugiura, T. Toyoda and T. Nakamura (2003), State estimation of the North Pacific Ocean by a four-dimensional variational data assimilation experiment, J. Oceanogr., 59, 931-943.
  • 4. Masuda, S. (2002), Role of the ocean in the decadal climate change in the North Pacific, J. Geophys. Res., 107, C12, 3224.
  • 3. Masuda, S. and K. Akitomo (2000), Effects of stratification and bottom topography on the Kuroshio path variation south of Japan. Part 2: Path transitions in a multiple equilibrium regime, J. Phys. Oceanogr., 30, 1431-1449.
  • 2. Masuda, S., K. Akitomo and T. Awaji (1999), Effects of stratification and bottom topography on the Kuroshio path variation south of Japan. Part 1: Dependence of the path selection on velocity. J. Phys.Oceanogr., 29, 2419-2431.
  • 1. Akitomo, K., S. Masuda and T. Awaji (1997), Kuroshio path variation south of Japan: Stability of the paths in a multiple equilibrium regime, J. Oceanogr., 53, 129-142.