Refereed Papers

• Balmaseda, M. A., O. J. Alves, A. Arribas, T. Awaji, D. W. Behringer, N. Ferry, Y. Fujii, T. Lee, M. Rienecker, T. Rosati, and D. Stammer (2009):
  Ocean initialization for seasonal forecasts.
  Oceanogr., 22, 144-153.
• Fujii, Y. (2005):
  Preconditioned Optimizing Utility for Large-dimensional analyses (POpULar).
  J. Oceanogr., 61, 167-181
• Fujii, Y., S. Ishizaki, and M. Kamachi (2005):
  Application of nonlinear constraints in a three-dimensional variational ocean analysis.
  J. Oceanogr., 61, 655-662
• Fujii, Y., H. Tsujino, N. Usui, H. Nakano, and M. Kamachi (2008):
  Application of singular vector analysis to the Kuroshio large meander.
  J. Geophys. Res., 113, C07026, doi:10.1029/2007JC004476.
• Fujii, Y., T. Nakaegawa, S. Matsumoto, T. Yasuda, G. Yamanaka, and M. Kamachi (2009):
  Coupled climate simulation by constraining ocean fields in a coupled model with ocean data.
  J. Climate, 22(20), 5541-5557.
• Oke, P. R., M. A. Balmaseda, M. Benkiran, J. A. Cummings, E. Dombrowsky, Y. Fujii, S. Guinehut, G. Larnicol, P.-Y. Le Traon, and M. J. Martin (2009):
  Observing system evaluations using GODAE systems.
  Oceanogr., 22, 144-153.
• Usui, N., S. Ishizaki, Y. Fujii, H. Tsujino, T. Yasuda, and M. Kamachi (2006):
  Meteorological Research Institute multivariate ocean variational estimation (MOVE) system: Some early results.
  Adv. Space Res., 37, 806-822, doi:10.1016/j.asr.2005.09.022
• Usui, N., H. Tsujino, Y. Fujii, and M. Kamachi (2006):
  Short-range prediction experiments of the Kuroshio path variabilities south of Japan.
  Ocean Dynamics, 56, 607-623.
• Usui, N., H. Tsujino, Y. Fujii, and M. Kamachi (2008):
  Generation of a trigger meander for the 2004 Kuroshio large meander.
  J. Geophys. Res., 113, C01012, doi:10.1029/2007JC004266.
• Usui, N., H. Tsujino, H. Nakano, and Y. Fujii (2008):
  Formation process of the Kuroshio large meander in 2004.
  J. Geophys. Res., 113, C08047, doi:10.1029/2007JC004675.
• Yamanaka, G., T. Yasuda, Y. Fujii, and S. Matsumoto (2009):
  Rapid termination of the 2006 El Nino and its relation to the Indian Ocean. Geophys. Res. Lett., 36, L07702, doi:10.1029/2009GL037298.

Non-refereed papers

• Fujii, Y., M. Kamachi, N. Usui, H. Tsujino, and H. Nakano (2009):
  Application of singular vector analysis to the Kuroshio large meander.
  5th WMO Data Assimilation Symposium Extended Abstract, 262. 1-8.
• Fujii, Y., N. Usui, H. Tsujino, and M. Kamachi, (2006):
  A new strategy with a time-spreading correction technique in the 4DVAR version of MRI Multivariate Ocean Variational Estimation (MOVE) System.
  Proceedings of the fourth WMO International symposium on assimilation of observations in Meteorology and Oceanography.
• Fujii, Y., T. Yasuda, T. Nakaegawa, and M. Kamachi (2008):
  Coupled Ocean and Atmosphere Simulation by Assimilating Ocean Observation Data to a Coupled Model.
  Third WCRP International Conference on Reanalysis Extended Abstract.
• Ishizaki, S., T. Yasuda, Y. Fujii, N. Usui, and M. Kamachi, (2006):
  Global temperature and salinity reanalysis experiment using MRI Multivariate Ocean Variational Estimation (MOVE) System.
  Proceedings of the fourth WMO International symposium on assimilation of observations in Meteorology and Oceanography.
• Soga,　T., I. Ishikawa, S. Matsumoto, Y. Fujii, and T. Yasuda, (2008):
  New Ocean Data Assimilation System for monitoring ENSO at Japan Meteorological Agency.
  Third WCRP International Conference on Reanalysis Extended Abstract.
• Tsujino, H., and Y. Fujii, (2007):
  Improved representation of currents and water masses in the upper layer of the North Pacific Ocean in eddy-resolving OGCMs.
  CLIVAR Exchanges, 42, 19-21.
• Usui, N., H. Tsujino, Y. Fujii, and M. Kamachi (2006):
  Reanalysis experiment using MRI Multivariate Ocean Variational Estimation (MOVE) System in the Western North Pacific.
  Proceedings of the fourth WMO International symposium on assimilation of observations in Meteorology and Oceanography.
• Usui, N., H. Tsujino, Y. Fujii, and M. Kamachi (2006):
  Formation process of the Kuroshio Large Meander in 2004.
  Proceedings of the Symposium on "15 years of progress in Rader Altimetry"
• Usui, N., S. Ishizaki, Y. Fujii, and M. Kamachi (2009):
  Improving strategies with constraints regarding non-Gaussian statistics in MOVE/MRI.COM.
  5th WMO Data Assimilation Symposium Extended Abstract, 260.1-8.

Oral and poster presentations (in English)

• Balmaseda , M. A., O. Alves, A. Arribas, T. Awaji, D. Behringer, N. Ferry, Y. Fujii, T. Lee, M. Rienecker, T. Rosati, and D. Stammer (2008):
  Ocean Initialization for Seasonal Forecasts.
  GODAE Final Symposium.
• Balmaseda, M., Y. Fujii, O. Alves, T. Lee, M. Rienecker, T. Rosati, D. Stammer, Y. Xue, H. Freeland, M. McPhaden, L. Goddard, and C. Coelho (2009):
  Ocean Observations for an End-to-End Seasonal Forecasting System.
  OceanObs'09, Venice, Italy.
• Balmaseda, M., O. Alves, T. Awaji, D. Behringer, N. Ferry, Y. Fujii, T. Lee, M. Rienecker, T. Rosati, D. Stammer, D. Smith, F. Molteni (2009):
  Initialization for Seasonal and Decadal Forecasts.
  OceanObs'09, Venice, Italy.
• Fujii, Y., S. Ishizaki, and M. Kamachi (2003):
  Three-Dimensional Analysis of Temperature and Salinity in the Equatorial Pacific Using a Variational Method with Vertical Coupled Temperature- Salinity EOF modes.
  International Workshop On the Low-Frequency Modulation of ENSO
• Fujii, Y., S. Ishizaki, N. Usui, T. Yasuda, H. Tsujino and M. Kamachi (2004):
  Impact of salinity correction in the Meteorological Research Institute Ocean Variational Estimation System
  COSPAR2004
• Fujii, Y., S. Matsumoto, S. Ishizaki, and T. Yasuda (2006):
  Variation of South Pacific Tropical Water in an ocean data assimilation system (MRI-MOVE) and its relation to ENSO.
  2006 AGU fall meeting
• Fujii, Y., N. Usui, S. Ishizaki, and M. Kamachi (2004):
  Preconditioned Optimizing Utility for Large-dimensional analyses (POpULar) in the MRI Multivariate Ocean Variational Estimation (MOVE) System.
  GODAE Summer School 2004
• Fujii, Y., N. Usui, S. Ishizaki, and M. Kamachi (2004):
  MRI Multivariate Ocean Variational Estimation (MOVE) System Part 1: System Design.
  Second Symposium on the Global Ocean Data Assimilation System "GODAE in Operation: Demonstrating Utility"
• Fujii, Y., N. Usui, S. Ishizaki, H. Tsujino, T. Yasuda, M. Kamachi (2004):


• MRI Multivariate Ocean Variational Estimation (MOVE) System.
  OST/ST Meeting 2004
• Fujii, Y., N. Usui, S. Ishizaki, H. Tsujino, T. Yasuda, and M. Kamachi (2004):
  
• Assimilation of satellite altimetry data into Meteorological Research Institute Ocean Variational Estimation System (MOVE-System).
  Workshop of the Ocean Surface Topography Science Team (OST/ST) of Japan
• Fujii, Y., N. Usui, S. Ishizaki, H. Tsujino, T. Yasuda, M. Kamachi, K. Yoshita, T. Sakurai, K. Sakamoto, T. Yoshida, T. Kuragano, Y. Kitamura (2004):
  Assimilation of ARGO Float Salinity Data in Ocean Data Assimilation Systems in the Japan Meteorological Agency.
  Intl. Workshop on the application of ARGO
• Fujii, Y., N. Usui, S. Ishizaki, S. Matsumoto, H. Tsujino, T. Yasuda, T. Nakano, and, M. Kamachi (2006):
  Modeling of background error statistics with temperature-salinity coupling.
  GODAE Symposium on ocean data assimilation and prediction in Asia-Oceania
• Fujii, Y., N. Usui, H. Tsujino, and M. Kamachi (2005):
  A new strategy with a time-spreading correction technique in the 4DVAR version of MRI Multivariate Ocean Variational Estimation System (MOVE-4DVAR)
  4th WMO International Symposium on Assimilation of Observations in Meteorology and Oceanography
• Fujii, Y., N. Usui, H. Tsujino, H. Nakano, S. Ishizaki, and M. Kamachi (2005):
  The Kuroshio meandering south of Japan: prediction and interpretation in JMA/MRI.
  EGU2005
• Fujii, Y., S. Matsumoto, S. Ishizaki, and M. Kamachi (2006):
  Variation of the South Pacific Tropical Water in an ocean data assimilation system (MRI-MOVE) and its relation to ENSO.
  Second Argo Science Workshop
• Fujii, Y., S. Matsumoto, T. Yasuda, and M. Kamachi (2007):
  Role of TAO-TRITON Arrays in the ENSO analysis and prediction using the ocean data assimilation system and the coupled model of MRI and JMA.
  Symposium on Observational studies of climate variability in the Pacific and Indian Oceans - Roles of surface buoy network -.
• Fujii, Y., H. Tsujino, N. Usui, S. Ishizaki, S. H. Nakano, and M. Kamachi (2007):
  OSSE-OSE activities with Multivariate Ocean Variational Estimation (MOVE) System. I: Application of singular vector analysis to the Kuroshio large meander.
  2007 OOPC- GODAE OSSE-OSE meeting.
• Fujii, Y., T. Yasuda, T. Nakaegawa, and M. Kamachi (2008):
  Coupled Ocean and Atmosphere Analysis by Assimilating Ocean Observation Data to a Coupled Model.
  Third WCRP International Conference on Reanalysis.
• Fujii, Y., S. Matsumoto, T. Nakano, T. Yasuda, and M. Kamachi (2008):
  Salinity variability in the tropical and subtropical Pacific in the MRI Multivariate Ocean Variational Estimation (MOVE) System.
  2008 Ocean Sciences Meeting.
• Fujii, Y., T. Yasuda, T. Nakaegawa, and M. Kamachi (2008):
  Coupled Ocean and Atmosphere Analysis by Assimilating Ocean Observation Data to a Coupled Model.
  Asia-Oceania Geosciences Society 2008.
• Fujii, Y., H. Tsujino, N. Usui, H. Nakano, and M. Kamachi (2008):
  Singular Vector Analysis of the Kuroshio Large Meander.
  Sasaki Symposium in Asia-Oceania Geosciences Society 2008.
• Fujii, Y., T. Yasuda, T. Nakaegawa, and M. Kamachi (2008):
  Coupled Ocean and Atmosphere Analysis by Assimilating Ocean Observation Data to a Coupled Model.
  CLIVAR-GSOP 2008.
• Fujii, Y., S. Matsumoto, N. Usui, H. Tsujino, T. Yasuda, and M. Kamachi (2008):
  OSE-OSSE activities using the ocean data assimilation and prediction system MOVE/MRI.COM.
  GODAE Final Symposium.
• Fujii, Y., T. Soga, S. Ishizaki, N. Usui, and M. Kamachi (2009):
  Quality Control and Diagnostic of Observation Data in Operational Ocean Data Assimilation Systems in JMA.
  2nd GODAE Ocean System Evaluation Workshop, Toulouse, France.
• Fujii, Y, S. Matsusmoto, T. Yasuda, M. Kamachi, and K. Ando (2009):
  OSE Experiments Using the JMA-MRI ENSO Forecasting System.
  2nd GODAE Ocean System Evaluation Workshop, Toulouse, France.
• Fujii, Y., M. Kamachi, N. Usui, S. Matsumoto, T. Yasuda, and S. Ishizaki (2009):
  Observing System evaluation using the ocean data assimilation and prediction system, MOVE/MRI.COM.
  OceanObs'09, Venice, Italy.
• Fujii, Y., M. Kamachi, N. Usui, H. Tsujino, and H. Nakano (2009):
  Application of singular vector analysis to the Kuroshio large meander.
  5th WMO Data Assimilation Symposium, Melbourne, Australia.
• Ishizaki, S., Y. Fujii, T. Yasuda, M. Kamachi (2005):
  Correction of zonal wind stress data based on oceanic observations in the equatorial Pacific in an ocean data assimilation system.
  Dynamic Planet 2005
• Ishizaki, S., T. Yasuda, Y. Fujii, N. Usui, and M. Kamachi (2004):
  MRI Multivariate Ocean Variational Estimation (MOVE) System. Part 2: Global Experiment and Reanalysis Product.
  Second Symposium on the Global Ocean Data Assimilation System "GODAE in Operation: Demonstrating Utility"
• Ishizaki, H., M. Hirabara, G. Yamanaka, and I. Ishikawa (2006):
  Lateral Mixing of Tracers due to Small-Scale Disturbances Simulated in an Eddy-Resolving OGCM.
  2006 AGU Fall Meeting.
• Ishizaki, S., T. Yasuda, Y. Fujii, N. Usui, and M. Kamachi (2004):
  MRI Multivariate Ocean Variational Estimation (MOVE) System. Part 2: Global Experiment and Reanalysis Product.
  Second Symposium on the Global Ocean Data Assimilation System "GODAE in Operation: Demonstrating Utility"
• Ishizaki, S., T. Yasuda, Y. Fujii, N. Usui, and M. Kamachi (2005):
  Global temperature and salinity reanalysis experiment using MRI Multivariate Ocean Variational Estimation (MOVE) System.
  4th WMO International Symposium on Assimilation of Observations in Meteorology and Oceanography
• Ishizaki, S., S. Matsumoto, Y. Fujii, T. Sakurai, T. Yoshida, T. Kuragano, and M. Kamachi (2006):
  Salinity impacts and balance correction of wind stress and sea surface height in MRI-MOVE system.
  Second Argo Science Workshop
• Kamachi, M., Y. Fujii, S. Ishizaki, N. Usui (2005):
  Impacts of multivariate analysis in MRI ocean data assimilation system.
  Joint Workshop on Coupled Model Simulation and Assimilation
• Kamachi, M., Y. Fujii, S. Ishizaki, N. Usui, T. Nakano, T. Kuragano, S. Sugimoto, T. Sakurai, K. Yoshita, N. Yoshioka (2004):
  Data assimilation in the Pacific Ocean as an application of observing system to physical oceanography and climate research.
  PICES 13th Annual Meeting
• Kamachi, M., Y. Fujii, S. Ishizaki, N. Usui, T. Nakano, T. Yasuda, H. Tsujino (2003):
  Three-dimensional analyses of salinity and temperature in the Pacific using a variational method with vertical coupled temperature-salinity EOF modes
  First Argo Science Workshop
• Kamachi, M., Y. Fujii, S. Ishizaki, and T. Yasuda (2004):
  Three Dimensional Analysis of Temperature and Salinity in the Equatorial Pacific Using a 3DVAR-Coupled EOF Decomposition Method.
  Sixth IOC/WESTPAC International Scientific Symposium "Challenges for Marine Science in the Western Pacific"
• Kamachi, M., Y. Fujii, S. Ishizaki, and N. Usui (2004):
  Inter-Comparison Pilot Project in the North and Equatorial Pacific.
  MERSEA Strand-1 and GODAE-Intercomparison Workshop
• Kamachi, M., S. Ishizaki, S. Masuda, N. Usui, and Y. Fujii (2005):
  Inter-Comparison of Pacific Ocean Data Assimilation Systems: Preliminary Results in the GODAE Pacific IC Pilot Project.
  Colloquium in honour and in memory of Christian Le Provost
• Kamachi, M., S. Matsumoto, T. Nakano, Y. Fujii, N. Usui, and T. Yasuda (2006):
  Multivariate Ocean Variational Estimation (MOVE/MRI.COM) System in JMA/MRI: Synthesis and Reanalysis with Emphasis on Temperature-Salinity Water Mass Variation.
  CLIVAR/GODAE Meeting on Ocean Synthesis Evaluation
• Matsumoto, S., T. Nakano, Y. Fujii, S. Ishizaki and M. Kamachi (2006):
  MOVE/MRI.COM System : Practical Implementations of Multivariate Structure in B-matrix and Water Mass Analyses.
  GODAE Symposium on ocean data assimilation and prediction in Asia-Oceania
• Matsumoto, S., Y. Fujii, T. Soga, T. Yasuda, S. Ishizaki, N. Usui, and M. Kamachi (2007):
  OSSE-OSE activities with Multivariate Ocean Variational Estimation (MOVE) System. II: Impacts of salinity and TAO/TRITON.
  2007 OOPC-GODAE OSSE-OSE meeting.
• Oke, O. R., M. A. Balmaseda, J. A. Cummings, E. Dombrowsky, Y. Fujii, S. Guinehut, G. Larnicol, P.-Y. Le Traon, and M. J. Martin (2008):
  Observing System Evaluation.
  GODAE Final Symposium.
• Oke, P. R., M. A. Balmaseda, M. Benkiran, J. A. Cummings, E. Dombrowsky, Y. Fujii, S. Guinehut, G. Larnicol, P.-Y. Le Traon, M. Martin (2009):
  Observing System Evaluation.
  OceanObs'09, Venice, Italy.
• Soga, T., I. Ishikawa, S. Matsumoto, Y. Fujii, and T. Yausda(2008):
  New Ocean Data Assimilation System for Monitoring ENSO an Japan Meteorological Agency.
  Third WCRP International Conference on Reanalysis.
• Soga, T., I. Ishikawa, S. Matsumoto, Y. Fujii, and M. Kamachi (2008):
  Operational Ocean Data Assimilation System for Monitoring ENSO at Japan Meteorological Agency.
  GODAE Final Symposium.
• Tsujino, H., N. Usui, Y. Fujii, H. Nakano, and M. Kamachi (2006) :
  The Kuroshio Path Transition: Prediction and Underlying Mechanism.
  2006 Ocean Sciences Meeting
• Usui, N., H. Tsujino, Y. Fujii, S. Ishizaki, and M. Kamachi (2005):
  Short-range prediction experiments of the Kuroshio path variabilities south of Japan.
  Colloquium in honour and in memory of Christian Le Provost
• Usui, N., H. Tsujino, Y. Fujii and M. Kamachi (2004):
  MRI Multi-Variate Ocean Variational Estimation (MOVE) System. Part 3: Western North Pacific Experiment and Reanalysis Product.
  Second Symposium on the Global Ocean Data Assimilation System "GODAE in Operation: Demonstrating Utility"
• Usui, N., H. Tsujino, Y. Fujii and M. Kamachi (2005):
  Reanalysis experiment using MRI Multivariate Ocean Variational Estimation (MOVE) System in the western North Pacific
  4th WMO International Symposium on Assimilation of Observations in Meteorology and Oceanography
• Usui, N., H. Tsujino, Y. Fujii, and M. Kamachi (2006):
  Formation process of the Kuroshio Meander southeast of Kyushu in 2003 fall
  2006 Western Pacific Geophysics Meeting
• Usui, N., H. Tsujino, Y. Fujii, and M. Kamachi (2006):
  Formation process of the Kuroshio Large Meander in 2004.
  15 years of Progress in Radar Altimetry Symposium
• Usui, N., H. Tsujino, Y. Fujii and M. Kamachi (2005):
  Reanalysis experiment using MRI Multivariate Ocean Variational Estimation (MOVE) System in the western North Pacific
  4th WMO International Symposium on Assimilation of Observations in Meteorology and Oceanography
• Usui, N., H. Tsujino, Y. Fujii, and M. Kamachi (2006):
  Formation process of the Kuroshio Meander southeast of Kyushu in 2003 fall
  2006 Western Pacific Geophysics Meeting
• Usui, N., H. Tsujino, Y. Fujii, and M. Kamachi (2006):
  Formation process of the Kuroshio Large Meander in 2004.
  15 years of Progress in Radar Altimetry Symposium
• Usui, N., H. Tsujino, Y. Fujii, and M. Kamachi (2006):
  A process study of the Kuroshio large meander in 2004 using a regional assimilation system MOVE/MRI.COM-WNP.
  GODAE Symposium on ocean data assimilation and prediction in Asia-Oceania
• Usui, N., H. Tsujino, Y. Fujii, and M. Kamachi (2007):
  Roles of frontal wave in the East China Sea on the Kuroshio path variation.
  2007 GODAE Coastal Workshop "Assessing the value of GODAE products in coastal and shelf seas"
• Usui, N., H. Tsujino, H. Nakano, Y. Fujii, and M. Kamachi (2008):
  Formation process of the Kuroshio large meander using a regional assimilation system MOVE/MRI.COM-WNP.
  2008 Ocean Sciences Meeting
• Usui, N., S. Ishizaki, Y. Fujii, H. Tsujino, M. Kamachi (2008):
  REPRODUCIBILITY OF CURRENTS AND WATER MASSES IN THE NORTH PACIFIC SUBARCTIC REGION IN MOVE/MRI.COM.
  GODAE Final Symposium.
• Usui, N., S. Ishizaki, Y. Fujii, and M. Kamachi (2009)：
  Improving strategies with constraints regarding non-Gaussian statistics in MOVE/MRI.COM.
  5th WMO Data Assimilation Symposium, Oct. 6th, 2009, Melbourne, Australia.
• Usui, N., H. Tsujino, H. Nakano, Y. Fujii, and M. Kamachi (2010)：
  Decay mechanism of the 2004/05 Kuroshio large meander.
  2010 Ocean Sciences Meeting, Portland, Oregon.
• Yamanaka G., T. Yasuda, Y. Fujii, and H. Ishizaki (2008):
  Mixed layer heat balance on seasonal to interannual timescales in the western tropical Pacific: An OGCM study
  2008 Ocean Sciences Meeting