Kyushu University Academic Staff Educational and Research Activities Database
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Naoki Hirose Last modified date:2017.08.29

Graduate School

Ocean Modeling Group .
Center for East Asian Ocean-Atmosphere Research .
Academic Degree
Ph. D
Field of Specialization
Outline Activities
Central issue of my current research is physical oceanography of the east Asian marginal seas such as the Japan/East Sea or the East China Sea. Mysterious ocean variability will be uncovered by way of deductive numerical modeling and inductive data assimilation. I am also interested in atmosphere-ocean interaction and influence of the ocean circulation to fisheries.
Research Interests
  • Regional climate affected by oceanic variation
    keyword : air-sea interaction, ocean-to-atmosphere feedback
  • High-frequency variability of barotropic ocean
    keyword : barotropic signals, high-frequency variability, pressure and wind forcing
    1999.04~2007.03High-frequency variability of barotropic ocean.
  • Ocean data assimilation
    keyword : ocean prediction, data assimilation, inverse estimation
    1996.04Ocean data assimilation.
  • Circulation research of the East Asian marginal seas
    keyword : ocean circulation, Japan Sea, East China Sea
    1996.04Japan Sea circulation.
Current and Past Project
  • Enhanced monitoring of ocean current using ADCP mounted in an international ferryboat crossing the Tsushima/Korea Strait
  • The primary purpose of the Collaboration is to conduct research toward 'Improvement of SST and predictability using NWP-ocean mixed layer coupled model'.
  • Numerical Experiment for Strontium-90 and Cesium-137 in the Japan Sea
  • The Coastal Ocean and Shelf Seas Task Team (COSSTT) deals with scientific issues in support of multidisciplinary analysis and forecasting of the coastal transition zone, as well as shelf/open ocean exchanges in relation with the larger-scale efforts.
Academic Activities
1. Naoki HIROSE, Yutaka KUMAKI, Atsushi KANEDA, Kouta AYUKAWA, Noriyuki OKEI, Satoshi IKEDA, Yosuke IGETA, Tatsuro WATANBE, Numerical simulation of the abrupt occurrence of strong current in the southeastern Japan Sea, Continental Shelf Research, 143, 2017.07, [URL].
2. Takeshi MATSUNO, Naoki HIROSE, Jing Zhang, Yang-Ki Cho, Dake Chen, Dongliang Yuan, Chin-Chang Hung, Sen Jan, Recent progress in Pacific-Asian Marginal Seas (PAMS) studies, Continental Shelf Research, 143, 2017.07, [URL].
3. Sooyon Han, Naoki Hirose, Norihisa Usui, Yasumasa Miyazawa, Multi-model ensemble estimation of volume transport through the straits of the East/Japan Sea, Ocean Dynamics, 66, 1, 2016.01, [URL].
4. Satoshi Nakada, Naoki HIROSE, Tomoharu Senjyu, Ken-ichi Fukudome, Toshihiro Tsuji, Noriyuki Okei, Operational Ocean Prediction Experiments for Smart Coastal Fishing, Progress in Oceanography, 121, 2014.02, [URL].
5. Naoki Hirose, Katsumi Takayama, Jae-Hong Moon, Tatsuro Watanabe, Yoshinori Nishida, Regional data assimilation system extended to the East Asian marginal seas, Umi to Sora (Sea and Sky), 89, 2, 2013.12, [URL].
6. MOON JAEHONG, Hirose Naoki, MORIMOTO Akihiko, Green's function approach for calibrating tides in a circulation model for the East Asian marginal seas, Journal of Oceanography, 68, 2, 345-354, 2012.04.
7. Hirose, N., Inverse estimation of empirical parameters used in a regional ocean circulation model, Journal of Oceanography, 67, 3, 323-336, 2011.06.
8. Moon, J.-H., N. Hirose, J.-H. Yoon, I.-G. Pang, Offshore detachment process of the low-salinity water around Changjiang Bank in the East China Sea, Journal of Physical Oceanography, 40, 5, 1035-1053, 2010.05, [URL].
9. Onitsuka, G., N. Hirose, K. Miyahara, T. Ota, J. Hatayama, Y. Mitsunaga, and T. Goto, Numerical simulation of the migration and distribution of diamond squid (Thysanoteuthis rhombus) in the southwest Sea of Japan, Fisheries Oceanography, 19, 1, 63-75, 2010.01, [URL].
10. Validation of the number of branches in the Tsushima Warm Current based on assimilated estimates, [URL].
11. Moon, J.-H., N. Hirose, and J.-H. Yoon, Comparison of wind and tidal contributions to seasonal circulation of the Yellow Sea, Journal of Geophysical Research, 114, C08016, 2009.08, [URL].
12. Yamamoto, M., and N. Hirose, Regional atmospheric simulation of monthly precipitation using high-resolution SST obtained from an ocean assimilation model: Application to the wintertime Japan Sea, Monthly Weather Review, 137, 2164-2174, 2009.07, [URL].
13. Hirose, N., K. Nishimura and M. Yamamoto, Observational evidence of a warm ocean current preceding a winter teleconnection pattern in the northwestern Pacific, Geophysical Research Letters, 36, L09705, doi:10.1029/2009GL037448, 2009.05, [URL].
14. Hirose, N., H. Kawamura, H. J. Lee, and J.-H. Yoon, Sequential Forecasting of the Surface and Subsurface Conditions in the Japan Sea, Journal of Oceanography, 63, 3, 467-481, 2007.06, [URL].
15. Numerical simulation of Kyucho along the eastern coast of the Noto Peninsula in 2004.
16. Hirose, N., and K. Fukudome, Monitoring the Tsushima Warm Current improves seasonal prediction of the regional snowfall, Scientific Online Letters on Atmosphere, 2, 61-63, 2006.04, [URL].
17. Hirose, N., I. Fukumori, C.-H. Kim, and J.-H. Yoon, Numerical simulation and satellite altimeter data assimilation of the Japan Sea circulation, Deep Sea Research II, 52, 11-13, 52, 1443-1463, 2005.08.
18. Hirose, N, Least-squares estimation of bottom topography using horizontal velocity measurements in the Tsushima/Korea Straits, Journal of Oceanography, 61, 4, 2005.08, [URL].
19. Hirose, N., I. Fukumori, R. M. Ponte, and V. Zlotnicki, Modeling the high-frequency barotropic response of the ocean to atmospheric disturbances: Sensitivity to forcing, topography, and friction, Journal of Geophysical Research, 106, C12, 30987-30995, 2001.12, [URL].
20. Hirose, N., I. Fukumori, and R. M. Ponte, A non-isostatic global sea level response to barometric pressure near 5 days, Geophysical Research Letters, 28, 12, 2441-2444, 2001.06, [URL].
21. Hirose, N. and A. G. Ostrovskii, Quasi-biennial variability in the Japan Sea, Journal of Geophysical Research, 105, C6, 105 (C6), 14011-14027, 2000.06, [URL].
22. Naoki Hirose, H.-C. Lee, Jong-Hwan Yoon, Surface Heat Flux in the East China Sea and the Yellow Sea, Journal of Physical Oceanography, 29, 3, 29, 401-417, 1999.03.
23. Hirose, N., I. Fukumori, and J.-H. Yoon, Assimilation of TOPEX/POSEIDON altimeter data with a reduced gravity model of the Japan Sea, Journal of Oceanography, 55, 53-64, 1999.01, [URL].
24. Hirose, N., C.-H. Kim, and J.-H. Yoon, Heat budget in the Japan Sea, Journal of Oceanography, 52, 553-574, 1996.10, [URL].
Works, Software and Database
1. Data assimilation Research of the East Asian Marine System
2. Japan Sea Forecasting System
3. The four-dimensional estimates of the Japan Sea circulation are provided for any of those who are interested in them. The data covers the entire Japan Sea (33-52N, 126.5-142.5E) for period from January 2nd, 1992 to November 19th, 2000 (total 3245days) with daily interval. The 1/6-degree, 19-level GFDL MOM (OGCM) was driven by daily ECMWF forecast and monthly inflow and outflow at the three openings. Satellite altimeter data of TOPEX/POSEIDON and ERS-1/2 were assimilated into the model by using approximate Kalman filter and RTS smoother. Please visit the URL:
1. Naoki Hirose, Coastal Ocean data assimilation experiment interacting with local fisheries, PAMS 2017 19th Pacific Asian Marginal Seas Meeting, 2017.04.11.
2. Naoki HIROSE, Atsushi KANEDA, Noriyuki OOKEI, Yutaka KUMAKI, Keiichi YAMAZAKI, Tatsuro WATANABE, Development of Coastal Prediction System for the Southeastern Japan Sea, Asia Oceania Geosciences Society (AOGS) 11th Annual Meeting, 2014.08.01.
3. Naoki Hirose, Katsumi Takayama, Improvement of ocean prediction model for the east Asian Marginal Seas, The 17th PAMS (Pacific Asian Marginal Seas) Meeting, 2013.04.24.
4. , [URL].
5. TAIRYO project: A real-time ocean prediction experiment for coastal fishery, [URL].
6. , [URL].
7. Effective momentum flux and empirical parameters inversely estimated by model Green's functions in the East Asian marginal seas, [URL].
8. Inverse estimation of empirical parameters in a circulation model for the East Asian marginal seas, [URL].
9. Validation of the number of branches in the Tsushima Warm Current, [URL].
10. Formation process of low-salinity water patches in the East China Sea, [URL].
11. Numerical tracer study on the migration of the giant jellyfish (Nemoplilema nomurai) in the Japan Sea, [URL].
12. Strong Influence of the Tsushima Warm Current on the Regional Climate in Winter, [URL].
13. , [URL].
14. , [URL].
15. , [URL].
16. , [URL].
17. , [URL].
18. , [URL].
19. Reanalysis of the Japan Sea Circulation Using Approximate Smoother.
20. A forecast system for the Japan/East Sea.
21. An ocean model for de-aliasing high-frequency barotropic sea level variations.
22. Quasi-biennial Variability in the Japan Sea.
23. Sea level anomaly propagation over the Japan Sea.
24. Separation of the East Korean Warm Current and the Deep Convection in the Japan Basin.
Membership in Academic Society
  • The Oceanographic Society of Japan
  • The Marine Meteorological Society
  • The Korean Society of Oceanography
  • Asia Oceania Geosciences Society
  • American Geophysical Union