TY - SLIDE KW - workshop KW - NWP KW - assimilation KW - high spectral resolution sounders AU - Richard Engelen AU - P.D. Watts AU - F. Chevallier AU - A. McNally C1 - Events DA - 2004 LA - eng PY - 2004 TI - Estimation of atmospheric CO2 concentrations through the data assimilation of AIRS radiances in the ECMWF 4D-Var system ER -