We thank M. Kanamitsu for many useful comments and for his help with the model. We also would like to thank D. Dommenget for his careful review of the original manuscript and for insightful discussions. Funding for this research was provided by a cooperative agreement with NOAA (NA77RJ0435 and NA17R1231). The views expressed herein are those of the authors and do not reflect the views of NOAA. We thank the Maui High Performance Computing Center (MHPCC) and the San Diego Supercomputing Center (SDSC) for providing resources for some of the experiments. This work is part of the Ph.D. thesis of T. Reichler. Comments by three anonymous reviewers helped to improve the presentation of these results.
Bacmeister, J. T., P. J. Pegion, S. D. Schubert, and M. J. Suarez, 2000: An atlas of seasonal means simulated by the NSIPP 1 atmospheric GCM. NASA Tech. Memo. 104606, Goddard Space Flight Center, 194 pp.
Barnston, A. G., and R. E. Livezey, 1987: Classification, seasonality and persistence of low-frequency atmospheric circulation patterns. Mon. Wea. Rev., 115 , 1083–1126.
Charney, J. G., and P. G. Drazin, 1961: Propagation of planetary-scale disturbances from the lower into the upper atmosphere. J. Geophys. Res., 66 , 83–109.
Karoly, D. J., 1989: Southern Hemisphere circulation features associated with El Niño–Southern Oscillation events. J. Climate, 2 , 1239–1252.
Kumar, A., S. Schubert, and M. Suarez, 2003: Variability and predictability of 200-mb seasonal mean heights during summer and winter. J. Geophys. Res.,108, 4169, doi:10.102/2002JD002728.
Madden, R. A., and P. R. Julian, 1972: Description of global-scale circulation cells in the Tropics with a 40–50 day period. J. Atmos. Sci., 29 , 1109–1123.
Mason, S. J., L. Goddard, N. E. Graham, E. Yulaeva, L. Q. Sun, and P. A. Arkin, 1999: The IRI seasonal climate prediction system and the 1997/98 El Niño event. Bull. Amer. Meteor. Soc., 80 , 1853–1873.
Perlwitz, J., and H. F. Graf, 2001: The variability of the horizontal circulation in the troposphere and stratosphere—A comparison. Theor. Appl. Climatol., 69 , 149–161.
Reichler, T., and J. O. Roads, 2003: The role of boundary and initial conditions for dynamical seasonal predictability. Nonlinear Proc. Geophys., 10 , 211–232.
Reichler, T., M. Dameris, and R. Sausen, 2003: Determining the tropopause height from gridded data. Geophys. Res. Lett., 30 , 2042. doi:10.1029/2003GL018240.
Roads, J. O., S. C. Chen, and F. Fujioka, 2001: ECPC's weekly to seasonal global forecasts. Bull. Amer. Meteor. Soc., 82 , 639–658.
Thompson, D. W. J., and J. M. Wallace, 2000: Annular modes in the extratropical circulation. Part I: Month-to-month variability. J. Climate, 13 , 1000–1016.
Thompson, D. W. J., M. P. Baldwin, and J. M. Wallace, 2002: Stratospheric connection to Northern Hemisphere wintertime weather: Implications for prediction. J. Climate, 15 , 1421–1428.
Toth, Z., and E. Kalnay, 1993: Ensemble forecasting at NMC—The generation of perturbations. Bull. Amer. Meteor. Soc., 74 , 2317–2330.
Trenberth, K. E., 1985: Potential predictability of daily geopotential heights over the Southern Hemisphere. Mon. Wea. Rev., 113 , 54–64.
Trenberth, K. E., G. W. Branstator, D. Karoly, A. Kumar, N. C. Lau, and C. Ropelewski, 1998: Progress during TOGA in understanding and modeling global teleconnections associated with tropical sea surface temperatures. J. Geophys. Res., 103 , 14291–14324.
Wallace, J. M., and D. S. Gutzler, 1981: Teleconnections in the geopotential height field during the Northern Hemisphere winter. Mon. Wea. Rev., 109 , 784–812.