TY - CPAPER AU - H. Eskes 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 - 165 EP - 179 T2 - Seminar on Global earth-system monitoring, 5-9 September 2005 TI - Scientific challenges in chemical data assimilation. ER -