The authors thank C. Deser, R. A. Tomas, and S. Peng for access to their model output and Christopher Walker for providing the code for the cross-spectral analysis. Comments from three anonymous reviewers helped to improve the manuscript. This research was supported by NSF Grant ATM-0612779 and NOAA Grant NA06OAR4310149.
Abatzolglou, J. T., , and G. Magnusdottir, 2006: Opposing effects of reflective and nonreflective planetary wave breaking on the NAO. J. Atmos. Sci., 63 , 3448–3457.
Chen, G., , and P. Zurita-Gotor, 2008: The tropospheric jet response to prescribed zonal forcing in an idealized atmospheric model. J. Atmos. Sci., 65 , 2254–2271.
Chen, G., , I. M. Held, , and W. A. Robinson, 2007: Sensitivity of the latitude of the surface westerlies to surface friction. J. Atmos. Sci., 64 , 2899–2915.
Deser, C., , G. Magnusdottir, , R. Saravanan, , and A. Phillips, 2004: The effects of North Atlantic SST and sea ice anomalies on the winter circulation in CCM3. Part II: Direct and indirect components of the response. J. Climate, 17 , 877–889.
Deser, C., , R. A. Tomas, , and S. Peng, 2007: The transient atmospheric circulation response to North Atlantic SST and sea ice anomalies. J. Climate, 20 , 4751–4767.
Ferreira, D., , and C. Frankignoul, 2005: The transient atmospheric response to midlatitude SST anomalies. J. Climate, 18 , 1049–1067.
Franzke, C., , S. Lee, , and S. B. Feldstein, 2004: Is the North Atlantic Oscillation a breaking wave? J. Atmos. Sci., 61 , 145–160.
Hayashi, Y., 1971: A generalized method of resolving disturbances into progressive and retrogressive waves by space Fourier and time cross-spectral analyses. J. Meteor. Soc. Japan, 49 , 125–128.
Hoskins, B. J., , I. N. James, , and G. H. White, 1983: The shape, propagation, and mean-flow interaction of large-scale weather systems. J. Atmos. Sci., 40 , 1595–1612.
Kushnir, Y., , and N-C. Lau, 1992: The general circulation response to a North Pacific SST anomaly: Dependence on time scale and pattern polarity. J. Climate, 5 , 271–283.
Kushnir, Y., , W. A. Robinson, , I. Blade, , N. M. J. Hall, , S. Peng, , and R. Sutton, 2002: Atmospheric GCM response to extratropical SST anomalies: Synthesis and evaluation. J. Climate, 15 , 2233–2256.
Magnusdottir, G., , C. Deser, , and R. Saravanan, 2004: The effects of North Atlantic SST and sea ice anomalies on the winter circulation in CCM3. Part I: Main features and storm track characteristics of the response. J. Climate, 17 , 857–876.
Peng, S., , W. A. Robinson, , and M. P. Hoerling, 1997: The modeled atmospheric response to midlatitude SST anomalies and its dependence on background circulation states. J. Climate, 10 , 971–987.
Peng, S., , W. A. Robinson, , and S. Li, 2002: North Atlantic SST forcing of the NAO and relationships with intrinsic hemispheric variability. Geophys. Res. Lett., 29 , 1276. doi:10.1029/2001GL014043.
Peng, S., , W. A. Robinson, , and S. Li, 2003: Mechanisms for the NAO response to the North Atlantic SST tripole. J. Climate, 16 , 1987–2004.
Randel, W. J., , and I. M. Held, 1991: Phase speed spectra of transient eddy fluxes and critical layer absorption. J. Atmos. Sci., 48 , 688–697.
Riviere, G., , and I. Orlanski, 2007: Characteristics of the Atlantic storm-track eddy activity and its relation with the North Atlantic Oscillation. J. Atmos. Sci., 64 , 241–266.