A New Look at Stratospheric Sudden Warmings . Part II : Evaluation of Numerical Model Simulations

  title={A New Look at Stratospheric Sudden Warmings . Part II : Evaluation of Numerical Model Simulations},
  author={Andrew J A Charlton and M. POLVANI and Judith Perlwitz and Fabrizio Sassi and Elisa Manzini and Kiyotaka Shibata and J Eric Nielsen},
The simulation of major midwinter stratospheric sudden warmings (SSWs) in six stratosphere-resolving general circulation models (GCMs) is examined. The GCMs are compared to a new climatology of SSWs, based on the dynamical characteristics of the events. First, the number, type, and temporal distribution of SSW events are evaluated. Most of the models show a lower frequency of SSW events than the climatology, which has a mean frequency of 6.0 SSWs per decade. Statistical tests show that three of… CONTINUE READING
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