We thank ECMWF for providing the ERA-40 reanalysis dataset. This research has been supported by the Natural Sciences and Engineering Research Council of Canada through a Post Doctoral Fellowship to the first author. J.P.’s contribution was funded by the NOAA Climate Program Office. N.H.’s contribution was funded by Grant 1370/08 from the Israeli Science Foundation. The authors are grateful to two anonymous reviewers for their helpful comments.
Baldwin, M. P., and T. J. Dunkerton, 1999: Downward propagation of the Arctic Oscillation from the stratosphere to the troposphere. J. Geophys. Res., 104 , 30937–30946.
Baldwin, M. P., and D. W. J. Thompson, 2009: A critical comparison of stratosphere–troposphere coupling indices. Quart. J. Roy. Meteor. Soc., 135 , 1661–1672.
Baldwin, M. P., D. B. Stevenson, D. D. W. Thompson, T. J. Dunkerton, A. J. Charlton, and A. O’Neill, 2003: Stratospheric memory and skill of extended-range weather forecasts. Science, 301 , 636–640.
Charney, J. G., and P. G. Drazin, 1961: Propagation of planetary disturbances from the lower into the upper atmosphere. J. Geophys. Res., 66 , 83–109.
Christiansen, B., 2001: Downward propagation of zonal mean zonal wind anomalies from the stratosphere to the troposphere: Model and reanalysis. J. Geophys. Res., 106 , 27307–27322.
Christiansen, B., 2003: Evidence for nonlinear climate change: Two stratospheric regimes and a regime shift. J. Climate, 16 , 3681–3689.
Gerber, E. P., L. Polvani, and D. Ancukiewicz, 2008: Annular mode time scales in the Intergovernmental Panel on Climate Change Fourth Assessment Report models. Geophys. Res. Lett., 35 , L22707. doi:10.1029/2008GL035712.
Gerber, E. P., and Coauthors, 2010: Stratosphere–troposphere coupling and annular mode variability in chemistry–climate models. J. Geophys. Res., 115 , D00M06. doi:10.1029/2009JD013770.
Harnik, N., 2009: Observed stratospheric downward reflection and its relation to upward pulses of wave activity. J. Geophys. Res., 114 , D08120. doi:10.1029/2008JD010493.
Harnik, N., and R. S. Lindzen, 2001: The effect of reflecting surfaces on the vertical structure and variability of stratospheric planetary waves. J. Atmos. Sci., 58 , 2872–2894.
Karpetchko, A., E. Kyrö, and B. M. Knudsen, 2005: Arctic and Antarctic polar vortices 1957–2002 as seen from the ERA-40 reanalyses. J. Geophys. Res., 110 , D21109. doi:10.1029/2005JD006113.
Lin, P., Q. Fu, S. Solomon, and J. M. Wallace, 2009: Temperature trend patterns in the Southern Hemisphere high latitudes: Novel indicators of stratospheric change. J. Climate, 22 , 6325–6341.
Neff, W., 1999: Decadal time scale trends and variability in the tropospheric circulation over the South Pole. J. Geophys. Res., 104 , 27217–27251.
Neff, W., J. Perlwitz, and M. Hoerling, 2008: Observational evidence for asymmetric changes in tropospheric heights over Antarctica on decadal time scales. Geophys. Res. Lett., 35 , L18703. doi:10.1029/2008GL035074.
Perlwitz, J., and N. Harnik, 2003: Observational evidence of a stratospheric influence on the troposphere by planetary wave reflection. J. Climate, 16 , 3011–3026.
Perlwitz, J., and N. Harnik, 2004: Downward coupling between the stratosphere and troposphere: The relative roles of wave and zonal mean processes. J. Climate, 17 , 4902–4909.
Perlwitz, J., S. Pawson, R. Fogt, J. E. Nielsen, and W. Neff, 2008: The impact of stratospheric ozone hole recovery on Antarctic climate. Geophys. Res. Lett., 35 , L08714. doi:10.1029/2008GL033317.
Randel, W. J., 1987: A study of planetary waves in the southern winter troposphere and stratosphere. Part I: Wave structure and vertical propagation. J. Atmos. Sci., 44 , 917–935.
Randel, W. J., D. E. Stevens, and J. L. Stanford, 1987: A study of planetary waves in the southern winter troposphere and stratosphere. Part II: Life cycles. J. Atmos. Sci., 44 , 936–949.
Thompson, D. W. J., M. Baldwin, and S. Solomon, 2005: Stratosphere–troposphere coupling in the southern hemisphere. J. Climate, 62 , 708–715.
Waugh, D. W., W. J. Randel, S. Pawson, P. A. Newman, and E. R. Nash, 1999: Persistence of the lower-stratospheric polar vortices. J. Geophys. Res., 104 , 27191–27201.