Articles | Volume 1, issue 1
Weather Clim. Dynam., 1, 93–109, 2020
Weather Clim. Dynam., 1, 93–109, 2020

Research article 10 Mar 2020

Research article | 10 Mar 2020

The role of wave–wave interactions in sudden stratospheric warming formation

Erik A. Lindgren and Aditi Sheshadri

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Cited articles

Allen, D. R., Bevilacqua, R. M., Nedoluha, G. E., Randall, C. E., and Manney, G. L.: Unusual stratospheric transport and mixing during the 2002 Antarctic winter, Geophys. Res. Lett., 30, 1599,, 2003. a
Austin, J. and Palmer, T. N.: The importance of nonlinear wave processes in a quiescent winter stratosphere, Q. J. Roy. Meteor. Soc., 110, 289–301,, 1984. a, b
Baldwin, M. P. and Dunkerton, T. J.: Stratospheric Harbingers of Anomalous Weather Regimes, Science, 294, 581–584,, 2001. a
Birner, T. and Albers, J. R.: Sudden Stratospheric Warmings and Anomalous Upward Wave Activity Flux, SOLA, 13, 8–12,, 2017. a, b, c, d, e, f, g, h, i
Butler, A. H., Seidel, D. J., Hardiman, S. C., Butchart, N., Birner, T., and Match, A.: Defining Sudden Stratospheric Warmings, B. Am. Meteorol. Soc., 96, 1913–1928,, 2015. a
Short summary
Sudden stratospheric warmings (SSWs) are extreme events that influence surface weather up to 2 months after onset. We remove wave–wave interactions (WWIs) in vertical sections of a general circulation model to investigate the role of WWIs in SSW formation. We show that the effects of WWIs depend strongly on the pressure levels where they occur and the zonal structure of the wave forcing in the troposphere. Our results highlight the importance of upper-level processes in stratospheric dynamics.