TY - CPAPER AU - N. Gagnon AU - C. Lavaysse AU - Marco Carrera AU - other authors BT - Workshop on Representing Model Uncertainty and Error in Numerical Weather and Climate Prediction Models, 20-24 June 2011 CY - Shinfield Park, Reading DA - 2011 LA - eng PB - ECMWF PP - Shinfield Park, Reading PY - 2011 EP - 357 T2 - Workshop on Representing Model Uncertainty and Error in Numerical Weather and Climate Prediction Models, 20-24 June 2011 TI - Perturbations of surface parameters or how to stumble upon chaos... again ER -