Analysis for "Dynamical Precursors for Statistical Prediction of Stratospheric Sudden Warming Events" by M. Jucker and T. Reichler

Starting from a coupled General Circulation Model (GCM) simulation of 9,990 years, this data gives the occurrence dates of Stratospheric Sudden Warmings (SSWs) within the data in data/NH/CM2p1_sswt_CP.nc. The SSW definition follows Charlton & Polvani (2007). Then, data/NH/CM2p1_dqdy_ABC_30.0hPa.nc gives the time series of meridional potential vorticity gradient at 30hPa in the stratosphere. data/CM2p1_f2_100hPa.nc contains the time series of the vertical component of Eliassen-Palm flux at 100hPa. Both quantities are standardized relative to climatological day of the year mean and standard deviation.
This data is used in Jucker & Reichler (2018) to investigate the feasibility of constructing predictors for SSW occurrence in a statistical way.
The analysis script SSWprobs.ipynb performs the analysis and creates the relevant figures from the paper.