TY - CPAPER AU - D. Fonteyn AU - S. Bonjean AU - S. Chabrillat AU - F. Daerden AU - Q. Errera BT - Seminar on Global earth-system monitoring, 5-9 September 2005 CY - Shinfield Park, Reading DA - 2006 LA - eng PB - ECMWF PP - Shinfield Park, Reading PY - 2006 SP - 181 EP - 195 T2 - Seminar on Global earth-system monitoring, 5-9 September 2005 TI - Chemical data assimilation at BIRA-IASB ER -