The authors thank Dr. Richard Wobus and Dr. Mozheng Wei for providing ensemble forecast data with which to conduct model integrations, and for their valuable comments and discussions. The authors are grateful to the two anonymous reviewers for insightful suggestions. Part of this work was performed as part of collaboration between the Numerical Prediction Division of JMA and the University of Tsukuba.
Black, E., , M. Blackburn, , G. Harrison, , B. Hoskins, , and J. Methven, 2004: Factors contributing to the summer 2003 European heatwave. Weather, 59, 217–223.
Carrera, M. L., , R. W. Higgins, , and V. E. Kousky, 2004: Downstream weather impacts associated with atmospheric blocking over the Northeast Pacific. J. Climate, 17, 4823–4839.
Chou, K. H., , and C. C. Wu, 2008: Typhoon initialization in a mesoscale model—Combination of the bogused vortex and the dropwindsonde data in DOTSTAR. Mon. Wea. Rev., 136, 865–879.
Côté, J., , S. Gravel, , A. Méthot, , A. Patoine, , M. Roch, , and A. Staniforth, 1998a: The operational CMC-MRB Global Environmental Multiscale (GEM) model. Part I: Design considerations and formulation. Mon. Wea. Rev., 126, 1373–1395.
Côté, J., , J.-G. Desmarais, , S. Gravel, , A. Méthot, , A. Patoine, , M. Roch, , and A. Staniforth, 1998b: The operational CMC-MRB Global Environmental Multiscale (GEM) model. Part II: Results. Mon. Wea. Rev., 126, 1397–1418.
D’Andrea, F., and Coauthors, 1998: Northern Hemisphere atmospheric blocking as simulated by 15 atmospheric general circulation models in the period 1979–1988. Climate Dyn., 14, 385–407.
Dole, R. M., 1986: Persistent anomalies of the extratropical Northern Hemisphere wintertime circulation: Structure. Mon. Wea. Rev., 114, 178–207.
Ehrendorfer, M., , and R. M. Errico, 1995: Mesoscale predictability and the spectrum of optimal perturbation. J. Atmos. Sci., 52, 3475–3500.
Enomoto, T., , W. Ohfuchi, , H. Nakamura, , and M. A. Shapiro, 2007: Remote effects of tropical storm Cristobal upon a cut-off cyclone over Europe in August 2002. Meteor. Atmos. Phys., 96, 29–42.
Fourrie, N., , D. Marchal, , F. Rabier, , B. Chapnik, , and G. Desroziers, 2006: Impact study of the 2003 North Atlantic THORPEX Regional Campaign. Quart. J. Roy. Meteor. Soc., 132, 275–295.
Froude, L. S. R., 2010: TIGGE: Comparison of the prediction of Northern Hemisphere extratropical cyclones by different ensemble prediction systems. Wea. Forecasting, 25, 819–836.
Inoue, J., , T. Enomoto, , T. Miyoshi, , and S. Yamane, 2009: Impact of observations from Arctic drifting buoys on the reanalysis of surface fields. Geophys. Res. Lett., 36, L08501, doi:10.1029/2009GL037380.
JMA, 2007: Outline of the operational numerical weather prediction at the Japan Meteorological Agency. Japan Meteorological Agency, 196 pp.
Johnson, C., , and R. Swinbank, 2009: Medium-range multi-model ensemble combination and calibration. Quart. J. Roy. Meteor. Soc., 135, 777–794.
Kimoto, M., , H. Mukougawa, , and S. Yoden, 1992: Medium-range forecast skill variation and blocking transition: A case study. Mon. Wea. Rev., 120, 1616–1627.
Langland, R. H., and Coauthors, 1999: The North Pacific Experiment (NORPEX-98): Targeted observations for improved North American weather forecasts. Bull. Amer. Meteor. Soc., 80, 1363–1384.
Lejenäs, H., , and H. Økland, 1983: Characteristics of Northern Hemisphere blocking as determined from a long time series of observational data. Tellus, 35A, 350–362.
Majumdar, S. J., , and P. M. Finocchio, 2010: On the ability of global Ensemble Prediction Systems to predict tropical cyclone track probabilities. Wea. Forecasting, 25, 659–680.
Matsueda, M., 2011: Predictability of Euro-Russian blocking in summer of 2010. Geophys. Res. Lett., 38, L06801, doi:10.1029/2010GL046557.
Matsueda, M., , M. Kyouda, , H. L. Tanaka, , and T. Tsuyuki, 2006: Multi-center grand ensemble using three operational ensemble forecasts. SOLA, 2, 33–36.
Matsueda, M., , M. Kyouda, , H. L. Tanaka, , and T. Tsuyuki, 2007: Daily forecast skill of multi-center grand ensemble. SOLA, 3, 29–32.
Matsueda, M., , R. Mizuta, , and S. Kusunoki, 2009: Future change in wintertime atmospheric blocking simulated using a 20-km-mesh atmospheric global circulation model. J. Geophys. Res., 114, D12114, doi:10.1029/2009JD011919.
Matsueda, M., , H. Endo, , and R. Mizuta, 2010: Future change in Southern Hemisphere summertime and wintertime atmospheric blockings simulated using a 20-km-mesh AGCM. Geophys. Res. Lett., 37, L02803, doi:10.1029/2009GL041758.
Nakamura, H., , M. Nakamura, , and J. L. Anderson, 1997: The role of high- and low-frequency dynamics in blocking formation. Mon. Wea. Rev., 125, 2074–2093.
Namias, J., 1947: Characteristics of the general circulation over the Northern Hemisphere during the abnormal winter 1946–47. Mon. Wea. Rev., 75, 145–152.
Palmer, T. N., , F. J. Doblas-Reyes, , A. Weisheimer, , and M. J. Rodwell, 2008: Toward seamless prediction: Calibration of climate change projections using seasonal forecasts. Bull. Amer. Meteor. Soc., 89, 459–470.
Pappenberger, F., , J. Bartholmes, , J. Thielen, , H. L. Cloke, , R. Buizza, , and A. de Roo, 2008: New dimensions in early flood warning across the globe using grand-ensemble weather predictions. Geophys. Res. Lett., 35, L10404, doi:10.1029/2008GL033837.
Park, Y.-Y., , R. Buizza, , and M. Leutbecher, 2008: TIGGE: Preliminary results on comparing and combining ensembles. Quart. J. Roy. Meteor. Soc., 134, 2029–2050.
Pelly, J. L., , and B. J. Hoskins, 2003b: How well does the ECMWF ensemble prediction system predict blocking? Quart. J. Roy. Meteor. Soc., 129, 1683–1702.
Quadrelli, R., , V. Pavan, , and F. Molteni, 2001: Wintertime variability of Mediterranean precipitation and its links with large-scale circulation anomalies. Climate Dyn., 17, 457–466.
Rex, D. F., 1950: Blocking action in the middle troposphere and its effect upon regional climate I: An aerological study of blocking action. Tellus, 2, 196–211.
Richardson, D., , R. Buizza, , and R. Hagedorn, 2005: Final report of the First Workshop on the THORPEX Interactive Grand Global Ensemble (TIGGE). WMO TD 1273, WWRP-THORPEX 5, 39 pp.
Ritchie, H., 1991: Application of the semi-Lagrangian method to a multilevel spectral primitive-equations model. Quart. J. Roy. Meteor. Soc., 117, 91–106.
Ritchie, H., , and C. Beaudoin, 1994: Approximations and sensitivity experiments with a baroclinic semi-Lagrangian spectral model. Mon. Wea. Rev., 122, 2391–2399.
Sellwood, J. K., , J. S. Majumdar, , E. B. Mapes, , and I. Szunyogh, 2008: Predicting the influence of observations on medium-range forecasts of atmospheric flow. Quart. J. Roy. Meteor. Soc., 134, 2011–2027.
Shutts, G. J., 1983: The propagation of eddies in diffluent jet streams: Eddy vorticity forcing of “blocking” flow fields. Quart. J. Roy. Meteor. Soc., 109, 737–762.
Shutts, G. J., 1986: A case study of eddy forcing during an Atlantic blocking episode. Advances in Geophysics, Vol. 29, Academic Press, 135–162.
Szunyogh, I., , Z. Toth, , A. V. Zimin, , S. J. Majumdar, , and A. Persson, 2002: Propagation of the effect of targeted observations: The 2000 Winter Storm Reconnaissance program. Mon. Wea. Rev., 130, 1144–1165.
Tanaka, H. L., , and M. F. Milkovich, 1990: A heat budget analysis of the polar troposphere in and around Alaska during the abnormal winter of 1988/89. Mon. Wea. Rev., 118, 1628–1639.
Toth, Z., , and E. Kalnay, 1993: Ensemble forecasting at NMC: The generation of perturbations. Bull. Amer. Meteor. Soc., 74, 2317–2330.
Trigo, R. M., , I. F. Trigo, , C. C. DaCamara, , and T. J. Osborn, 2004: Climate impact of the European winter blocking episodes from the NCEP/NCAR reanalyses. Climate Dyn., 23, 17–28.
Tyrlis, E., , and B. J. Hoskins, 2008: Aspects of a Northern Hemisphere atmospheric blocking climatology. J. Atmos. Sci., 65, 1638–1652.
Wu, C. C., , K. H. Chou, , P. H. Lin, , S. D. Aberson, , M. S. Peng, , and T. Nakazawa, 2007: The impact of dropwindsonde data on typhoon track forecasts in DOTSTAR. Wea. Forecasting, 22, 1157–1176.
Yamaguchi, M., , T. Iriguchi, , T. Nakazawa, , and C. C. Wu, 2009: An observing system experiment for Typhoon Conson (2004) using a singular vector method and DOTSTAR data. Mon. Wea. Rev., 137, 2801–2816.