The support offered by NOAA’s Climate Dynamics and Experimental Prediction Program, and the NOAA-OGP GOALS program, are gratefully acknowledged. The GFDL model data were kindly provided by Issac Held, Gabriel Lau, and Mary Jo Nath as part of the GFDL-Universities Consortium project. The CCM3 data were kindly provided by Maurice Blackmon, Jim Hurrell, and Jeff Lee of NCAR’s Climate and Global Dynamics Division. The ECHAM3 data were kindly provided by Lisa Goddard of the International Research Institute at Lamont-Doherty.
Arkin, P. A., and B. N. Meisner, 1987: The relationship between large-scale convective rainfall and cloud cover over the Western Hemisphere during 1982–84. Mon. Wea. Rev.,115, 51–74.
Broccoli, A. J., and S. Manabe, 1992: The effects of orography on midlatitude Northern Hemisphere dry climates. J. Climate,5, 1181–1201.
Cubash, U., 1985: The mean response of the ECMWF global model to the composite El Niño anomaly in extended range prediction experiments. Coupled Ocean–Atmosphere Models, J. Nihoul, Ed., Elsevier, 329–343.
Gershunov, A., and T. P. Barnett, 1998: ENSO influence on intraseasonal extreme rainfall and temperature frequencies in the contiguous United States: Observations and model results. J. Climate,11, 1575–1586.
Glantz, M. H., 1999: A La Niña summit: A Review of the causes and consequences of cold events. Report of the workshop held 15–17 July 1998 in Boulder, CO, Environmental and Societal Impacts Group, NCAR, 153 pp.
Hack, J. J., 1994: Parameterization of moist convection in the National Center for Atmospheric Research Community Climate Model (CCM2). J. Geophys. Res.,99, 5551–5568.
Held, I. M., S. W. Lyons, and S. Nigam, 1989: Transients and the extratropical response to El Niño. J. Atmos. Sci.,46, 163–174.
Hoerling, M. P., and A. Kumar, 1997: Why do North American climate anomalies differ from one El Niño event to another? Geophys. Res. Lett.,24, 1059–1062.
——, ——, and M. Zhong, 1997: El Niño, La Niña, and the nonlinearity of their teleconnections. J. Climate,10, 1769–1786.
Kok, C. J., and J. D. Opsteegh, 1985: On the possible causes of anomalies in seasonal mean circulation pattern during the 1982–83 El Niño event. J. Atmos. Sci.,42, 677–694.
Kumar, A., and M. P. Hoerling, 1997: Interpretation and implications of observed inter-El Niño variability. J. Climate,10, 83–91.
——, and ——, 1998: Annual cycle of Pacific/North American seasonal predictability associated with different phases of ENSO. J. Climate,11, 3295–3308.
——, and ——, 1999: Analysis of atmospheric response to tropical Pacific SSTs in different AGCMs. Preprints, Eighth Conf. on Climate Variations, Denver, CO, Amer. Meteor. Soc., 80–83.
——, ——, M. Ji, A. Leetmaa, and P. D. Sardeshmukh, 1996: Assessing a GCM’s suitability for making seasonal predictions. J. Climate,9, 115–129.
——, A. Barnston, P. Peng, M. Hoerling, and L. Goddard, 2000: Changes in seasonal mean atmospheric internal variability associated with ENSO. J. Climate,13, 3139–3151.
Liebmann, B., and C. A. Smith, 1996: Description of a complete (interpolated) outgoing longwave radiation dataset. Bull. Amer. Meteor. Soc.,77, 1275–1277.
Mitchell, T. P., and J. M. Wallace, 1996: ENSO seasonality: 1950–78 versus 1979–92. J. Climate,9, 3149–3161.
Molteni, F., L. Ferranti, T. N. Palmer, and P. Viterbo, 1993: A dynamical interpretation of the global response to equatorial Pacific SST anomalies. J. Climate,6, 777–795.
Montroy, D. L., M. B. Richman, and P. J. Lamb, 1998: Nonlinearities of observed monthly teleconnections between tropical Pacific sea surface temperature anomalies and central and eastern North American precipitation. J. Climate,11, 1812–1835.
Rasmusson, E. M., and T. H. Carpenter, 1982: Variations in sea surface temperature and surface wind fields associated with the Southern Oscillation/El Niño. Mon. Wea. Rev.,110, 354–384.
Roeckner, E., and Coauthors, 1992: Simulation of the present-day climate with the ECHAM model: Impact of model physics and resolution. Max-Planck-Institut für Meteorlogie Rep. 93, 171 pp. [Available from MPI für Meteorologie, Bundesstr. 55, D-20146, Hamburg, Germany.].
van den Dool, H., and Coauthors, 1998: 3rd annual review of skill of CPC real time long lead predictions. Proc. 23d Annual Climate Diagnostics Workshop, Miami, FL, U.S. Dept. of Commerce, NOAA, 9–12.
Wolter, K., and M. S. Timlin, 1998: Measuring the strength of ENSO events—How does 1997/98 rank? Weather,53, 315–324.
Zhang, G. J., and N. A. McFarlane, 1995: Sensitivity of climate simulations to the parameterization of cumulus convection in the Canadian Climate Centre general circulation model. Atmos.–Ocean,33, 407–446.
Zwiers, F. W., X. L. Wang, and J. Sheng, 2000: Effects of specifying bottom boundary conditions in an ensemble of atmospheric GCM simulations. J. Geophys. Res.,105, 7295–7315.