|Title||Review of the perturbation methods in the Meteorological Service of Canada (MSC) Global Ensemble Prediction System (GEPS)|
|Event||ECMWF/WWRP Workshop: Model Uncertainty|
|Authors||Gagnon, N, Houtekamer, PL, Deng, X-X, Erfani, A, Charron, M|
|Keywords||model uncertainty, workshop|
MSC is running a 20 member GEPS (0.45x0.45L40) up to Day 16 operationally (32 days on Thursdays at 00Z). This system is using an Ensemble Kalman Filter as a data assimilation scheme (Houtekamer et al. 2014) to generate the initial conditions for the medium-range ensemble forecasts. The forecast perturbations are coming from set a multi-physical parameterizations as well as two stochastic approaches (physical tendencies perturbations and the stochastic energy back-scattering scheme).