TY - CPAPER AU - David Richardson BT - Diagnosis of models and data assimilation systems, 6-10 September 1999 CY - Shinfield Park, Reading DA - 1999 LA - eng PB - ECMWF PP - Shinfield Park, Reading PY - 1999 SP - 97 EP - 122 T2 - Diagnosis of models and data assimilation systems, 6-10 September 1999 TI - Ensembles using multiple models and analyses ER -