We thank the two anonymous reviews for insightful comments. DMM is supported by a grant from the UK Natural Environmental Research Council (NERC); LJG and SMO are funded by the NERC National Centre for Atmospheric Science (NCAS). The work of SCH and NB was supported by the Joint DECC/Defra Met Office Hadley Centre Climate Programme (GA01101) and the European Commission’s 7th Framework Programme COMBINE project 226520. PW is supported by a NERC student grant. We would also like to thank the Stratosphere and Climate groups at the Universities of Reading and Oxford for useful discussions.
Andrews, D., , J. Holton, , and C. Leovy, 1987: Middle Atmosphere Dynamics. Academic Press, 489 pp.
Baldwin, M., , and D. Thompson, 2009: A critical comparison of stratosphere–troposphere coupling indices. Quart. J. Roy. Meteor. Soc., 135, 1661–1672.
Bell, C., , L. Gray, , and J. Kettleborough, 2010: Changes in Northern Hemisphere stratospheric variability under increased CO2 concentrations. Quart. J. Roy. Meteor. Soc., 136, 1181–1190.
Butchart, N., and Coauthors, 2011: Multimodel climate and variability of the stratosphere. J. Geophys. Res., 116, D05102, doi:10.1029/2010JD014995.
Charlton, A., , and L. Polvani, 2007: A new look at stratospheric sudden warmings. Part I: Climatology and modeling benchmarks. J. Climate, 20, 449–469.
Charlton, A., , A. O’Neill, , W. Lahoz, , A. Massacand, , and P. Berrisford, 2005: The impact of the stratosphere on the troposphere during the Southern Hemisphere stratospheric sudden warming, September 2002. Quart. J. Roy. Meteor. Soc., 131, 2171–2188.
Charlton, A., and Coauthors, 2007: A new look at stratospheric sudden warmings. Part II: Evaluation of numerical model simulations. J. Climate, 20, 470–488.
Charlton-Perez, A., , L. Polvani, , J. Austin, , and F. Li, 2008: The frequency and dynamics of stratospheric sudden warmings in the 21st century. J. Geophys. Res., 113, D16116, doi:10.1029/2007JD009571.
Charney, J., , P. Drazin, and Coauthors, 1961: Propagation of planetary-scale disturbances from the lower into the upper atmosphere. J. Geophys. Res., 66, 83–109.
Clough, S., , and M. Iacono, 1995: Line-by-line calculation of atmospheric fluxes and cooling rates. 2. Application to carbon dioxide, ozone, methane, nitrous oxide and the halocarbons. J. Geophys. Res., 100, 16 519–16 535.
Esler, J., , L. Polvani, , and R. Scott, 2006: The Antarctic stratospheric sudden warming of 2002: A self-tuned resonance? Geophys. Res. Lett., 33, L12804, doi:10.1029/2006GL026034.
Fels, S., , J. Mahlman, , M. Schwarzkopf, , and R. Sinclair, 1980: Stratospheric sensitivity to perturbations in ozone and carbon dioxide: Radiative and dynamical response. J. Atmos. Sci., 37, 2265–2297.
Hannachi, A., , D. Mitchell, , L. Gray, , and A. Charlton-Perez, 2011: On the use of geometric moments to examine the continuum of sudden stratospheric warmings. J. Atmos. Sci., 68, 657–674.
Hardiman, S., , N. Butchart, , T. Hinton, , S. Osprey, , and L. Gray, 2012: The effect of a well-resolved stratosphere on surface climate: Differences between CMIP5 simulations with high and low top versions of the Met Office climate model. J. Climate, in press.
Jones, C., and Coauthors, 2011: The HadGEM2-ES implementation of CMIP5 centennial simulations. Geosci. Model Dev. Discuss., 4, 689–763.
Martin, G., and Coauthors, 2011: The HadGEM2 family of Met Office Unified Model Climate configurations. Geosci. Model Dev. Discuss., 4, 765–841.
Matthewman, N., , J. Esler, , A. Charlton-Perez, , and L. Polvani, 2009: A new look at stratospheric sudden warmings. Part III: Polar vortex evolution and vertical structure. J. Climate, 22, 1566–1585.
McLandress, C., , and T. Shepherd, 2009: Impact of climate change on stratospheric sudden warmings as simulated by the Canadian Middle Atmosphere Model. J. Climate, 22, 5449–5463.
Mitchell, D., , A. Charlton-Perez, , and L. Gray, 2011a: Characterizing the variability and extremes of the stratospheric polar vortices using 2D moment analysis. J. Atmos. Sci., 68, 1194–1213.
Mitchell, D., , L. Gray, , and A. Charlton-Perez, 2011b: The structure and evolution of the stratospheric vortex in response to natural forcings. J. Geophys. Res., 116, D15110, doi:10.1029/2011JD015788.
Mitchell, D., and Coauthors, 2012b: The nature of arctic polar vortices in chemistry–climate models. Quart. J. Roy. Meteor. Soc., in press.
Rind, D., , D. Shindell, , P. Lonergan, , and N. Balachandran, 1998: Climate change and the middle atmosphere. Part III: The doubled CO2 climate revisited. J. Climate, 11, 876–894.
Schoeberl, M., , and D. Hartmann, 1991: The dynamics of the stratospheric polar vortex and its relation to springtime ozone depletions. Science, 251, 46–52.
Son, S.-W., and Coauthors, 2008: The impact of stratospheric ozone recovery on the Southern Hemisphere westerly jet. Science, 320, 1486–1489.
Son, S.-W., and Coauthors, 2010: Impact of stratospheric ozone on Southern Hemisphere circulation change: A multimodel assessment. J. Geophys. Res., 115, D00M07, doi:10.1029/2010JD014271.
Thompson, D., , M. Baldwin, , and J. Wallace, 2002: Stratospheric connection to Northern Hemisphere wintertime weather: Implications for prediction. J. Climate, 15, 1421–1428.
Waugh, D., , and W. Randel, 1999: Climatology of Arctic and Antarctic polar vortices using elliptical diagnostics. J. Atmos. Sci., 56, 1594–1613.
Waugh, D., , L. Oman, , S. Kawa, , R. Stolarski, , S. Pawson, , A. Douglass, , P. Newman, , and J. Nielsen, 2009: Impacts of climate change on stratospheric ozone recovery. Geophys. Res. Lett., 36, L03805, doi:10.1029/2008GL036223.
Woollings, T., , A. Charlton-Perez, , S. Ineson, , A. Marshall, , and G. Masato, 2010: Associations between stratospheric variability and tropospheric blocking. J. Geophys. Res., 115, D06108, doi:10.1029/2009JD012742.
This scenario follows an increase in radiative forcing throughout the twenty-first century, which reaches a maximum of 8.5 W m−2 in 2100.
As an aside, little is known at present about how the surface influence from SSWs varies as a function of occurrence within winter. While this analysis is beyond the scope of this study, it should be addressed in the near future.