TY - CPAPER AU - Richard Engelen BT - ECMWF Workshop on Assimilation of high spectral resolution sounders in NWP, 28 June - 1 July 2004 CY - Shinfield Park, Reading DA - 2004 LA - eng PB - ECMWF PP - Shinfield Park, Reading PY - 2004 SP - 113 EP - 122 T2 - ECMWF Workshop on Assimilation of high spectral resolution sounders in NWP, 28 June - 1 July 2004 TI - Estimation of atmospheric CO2 concentrations through the data assimilation of AIRS radiances in the ECMWF 4D-Var system ER -