T. Auligne, A. P. Mcnally, and D. P. Dee, Adaptive bias correction for satellite data in a numerical weather prediction system, Q. J. R. Meteorol. Soc, vol.133, pp.631-642, 2007.

H. H. Aumann, AIRS/AMSU/HSB on the Aqua mission: Design, science objectives, data products, and processing systems, IEEE Trans. Geosci. Remote Sens, vol.41, pp.253-264, 2003.

A. Benedetti and M. Fisher, Background error statistics for aerosol, Q. J. R. Meteorol. Soc, vol.133, pp.391-405, 2007.

M. Chahine, C. Barnet, E. T. Olsen, L. Chen, and E. Maddy, On the determination of atmospheric minor gases by the method of vanishing partial derivatives with application to CO 2, Geophys. Res. Lett, vol.32, p.22803, 2005.

M. Chahine, L. Chen, P. Dimotakis, X. Jiang, Q. Li et al., Satellite remote sensing of midtropospheric CO 2, Geophys. Res. Lett, vol.35, p.17807, 2008.

A. Chédin, N. A. Scott, R. Armante, C. Pierangelo, C. Crevoisier et al., A quantitative link between CO 2 emissions from tropical vegetation fires and the daily tropospheric excess (DTE) of CO 2 seen by NOAA-10, J. Geophys. Res, vol.113, p.5302, 1987.

F. Chevallier, R. J. Engelen, and P. Peylin, The contribution of AIRS data to the estimation of CO 2 sources and sinks, Geophys. Res. Lett, vol.32, p.23801, 2005.
URL : https://hal.archives-ouvertes.fr/bioemco-00175978

F. Chevallier, M. Fisher, P. Peylin, S. Serrar, P. Bousquet et al., Inferring CO 2 sources and sinks from satellite observations: Method and application to TOVS data, J. Geophys. Res, vol.110, p.24309, 2005.
URL : https://hal.archives-ouvertes.fr/bioemco-00175976

P. Courtier, J. Thépaut, and A. Hollingsworth, A strategy for operational implementation of 4D-Var, using an incremental approach, Q. J. R. Meteorol. Soc, vol.120, pp.1367-1387, 1994.

C. Crevoisier, A. Chedin, and N. A. Scott, AIRS channel selection for CO 2 and other trace-gas retrievals, Q. J. R. Meteorol. Soc, vol.129, pp.2719-274, 2003.

A. S. Denning, Three-dimensional transport and concentration of SF6: A model intercomparison study, Tellus, Ser. B, vol.51, issue.2, pp.266-297, 1999.
URL : https://hal.archives-ouvertes.fr/hal-02870565

F. Dentener, Emissions of primary aerosol and precursor gases in the years 2000 and 1750 prescribed data-sets for aerocom, Atmos. Chem. Phys, vol.6, pp.4321-434, 2006.
URL : https://hal.archives-ouvertes.fr/hal-00327844

R. J. Engelen and A. P. Mcnally, Estimating atmospheric CO 2 from advanced infrared satellite radiances within an operational fourdimensional variational (4D-Var) data assimilation system: Results and validation, J. Geophys. Res, vol.110, p.18305, 2005.

M. Fisher, Background error covariance modelling, paper presented at Seminar on Recent Developments in Data Assimilation for Atmosphere and Ocean, Eur. Cent. for Med. Range Weather Forecasts, pp.8-12, 2003.

M. Fisher, Generalised frames on the sphere, with application to background error covariance modelling, paper presented at Seminar on Recent Developments in Numerical Methods for Atmospheric and Ocean Modelling, Eur. Cent. for Med.-Range Weather Forecasts, pp.6-10, 2004.

M. Fisher, Wavelet'' J b -A new way to model the statistics of background errors, ECMWF Newsl, vol.106, pp.23-28, 2006.

M. Fisher, M. Leutbecher, and G. A. Kelly, On the equivalence between Kalman smoothing and weak-constraint four-dimensional variational data assimilation, Q. J. R. Meteorol. Soc, vol.131, pp.3235-3246, 2005.

S. R. Freitas, Including the sub-grid scale plume rise of vegetation fires in low resolution atmospheric transport models, Atmos. Chem. Phys, vol.7, pp.3385-3398, 2007.
URL : https://hal.archives-ouvertes.fr/hal-00303953

L. Giglio, J. Descloitres, C. O. Justice, and Y. Kaufman, An enhanced contextual fire detection algorithm for MODIS, Remote Sens. Environ, vol.87, pp.273-282, 2003.

K. R. Gurney, Towards robust regional estimates of CO 2 sources and sinks using atmospheric transport models, Nature, vol.415, pp.626-630, 2002.
URL : https://hal.archives-ouvertes.fr/hal-02888447

A. Hollingsworth, Toward a monitoring and forecasting system for atmospheric composition, Bull. Am. Meteorol. Soc, vol.89, pp.1147-1164, 2008.
URL : https://hal.archives-ouvertes.fr/hal-00322491

M. Hortal, Recent studies of semi-lagrangian advection at ECMWF, Eur. Cent. for Med.-Range Weather Forecasts, vol.204, 1994.

D. Hurst, Continuing emissions of restricted halocarbons in the USA and Canada: Are they still globally significant?, J. Geophys. Res, vol.111, p.15302, 2006.

G. Krinner, A dynamic global vegetation model for studies of the coupled atmosphere-biosphere system, Global Biogeochem. Cycles, vol.19, p.1015, 2005.
URL : https://hal.archives-ouvertes.fr/hal-02865384

M. Labonne, F. F.-m.-bréon, and . Chevallier, Injection height of biomass burning aerosols as seen from a spaceborne lidar, Geophys. Res. Lett, vol.34, p.11806, 2007.
URL : https://hal.archives-ouvertes.fr/hal-02946364

R. M. Law, TransCom model simulations of hourly atmospheric CO 2 : Experimental overview and diurnal cycle results for, Global Biogeochem. Cycles, vol.22, p.3009, 2002.

B. R. Lintner, A. B. Gilliland, and I. Y. Fung, Mechanisms of convection-induced modulation of passive tracer interhemispheric transport interannual variability, J. Geophys. Res, vol.109, p.13102, 2004.

A. C. Lorenc, Analysis methods for numerical weather prediction, Q. J. R. Meteorol. Soc, vol.112, pp.1177-1194, 1986.

M. Matricardi, RTIASI-4, a new version of the ECMWF fast radiative transfer model for the infrared atmospheric sounding interferometer, Eur. Cent. for Med.-Range Weather Forecasts, vol.425, 2003.

M. Matricardi, F. Chevallier, G. Kelly, and J. Thépaut, An improved general fast radiative transfer model for the assimilation of radiance observations, Q. J. R. Meteorol. Soc, vol.130, pp.153-173, 2004.
URL : https://hal.archives-ouvertes.fr/hal-02946348

A. P. Mcnally and P. D. Watts, A cloud detection algorithm for high-spectral-resolution infrared sounders, Q. J. R. Meteorol. Soc, vol.129, pp.3411-3423, 2003.

A. P. Mcnally, P. D. Watts, J. A. Smith, R. Engelen, G. A. Kelly et al., The assimilation of AIRS radiance data at ECMWF, Q, J. R. Meteorol. Soc, vol.132, pp.935-957, 2006.

J. F. Meirink, Four-dimensional variational data assimilation for inverse modeling of atmospheric methane emissions: Analysis of SCIAMACHY observations, J. Geophys. Res, vol.113, p.17301, 2008.

J. G. Olivier and J. Berdowski, Global emissions, sources and sinks, in The Climate System, A. A. Balkema, pp.33-78, 2001.

S. C. Olsen and J. T. Randerson, Differences between surface and column atmospheric CO 2 and implications for carbon cycle research, J. Geophys. Res, vol.109, p.2301, 2004.

D. F. Parrish and J. C. Derber, The National Meteorological Center's spectral statistical-interpolation analysis system, Mon. Weather Rev, vol.120, pp.1747-1763, 1992.

P. K. Patra, M. Takigawa, G. S. Dutton, K. Uhse, K. Ishijima et al., Transport mechanisms for synoptic, seasonal and interannual SF6 variations in troposphere, Atmos. Chem. Phys, vol.8, p.767, 2008.

P. K. Patra, TransCom model simulations of hourly atmospheric CO 2 : Analysis of synoptic-scale variations for the period, Global Biogeochem. Cycles, vol.22, p.4013, 2002.

P. Peylin, Evaluation of Television Infrared Observation Satellite (TIROS-N) Operational Vertical Sounder (TOVS) spaceborne CO 2 estimates using model simulations and aircraft data, J. Geophys. Res, vol.112, p.9313, 2007.
URL : https://hal.archives-ouvertes.fr/bioemco-00175811

J. T. Randerson, M. V. Thompson, T. J. Conway, I. Y. Fung, and C. B. Field, The contribution of terrestrial sources and sinks to trends in the seasonal cycle of atmospheric carbon dioxide, Global Biogeochem. Cycles, vol.11, pp.535-560, 1997.

D. Rind, J. Lerner, J. Jonas, and C. Mclinden, Effects of resolution and model physics on tracer transports in the NASA Goddard Institute for Space Studies general circulation models, J. Geophys. Res, vol.112, p.9315, 2007.

L. L. Strow and S. E. Hannon, A 4-year zonal climatology of lower tropospheric CO 2 derived from ocean-only Atmospheric Infrared Sounder observations, J. Geophys. Res, vol.113, p.18302, 2008.

T. Takahashi, Global sea-air CO 2 flux based on climatological surface ocean pCO 2 , and seasonal biological and temperature effects, Deep Sea Res., Part II, vol.49, pp.1601-1622, 2002.
URL : https://hal.archives-ouvertes.fr/hal-01282876

P. P. Tans, J. Hoffman, R. M. Peterson, G. R. Rosson-;-van-der-werf, J. T. Randerson et al., Interannual variability in global biomass burning emissions from, vol.23, pp.3423-3441, 1994.

P. D. Watts and A. P. Mcnally, Identification and correlation of radiative transfer modelling errors for atmospheric sounders: AIRS and AMSU-A, paper presented at Workshop on Assimilation of High Spectral Resolution Sounders in NWP, Eur. Cent. for Med.-Range Weather Forecasts, vol.28, 2004.

F. Chevallier, Laboratoire des Sciences du Climat et de l'Environnement, L'Orme des Merisiers, vol.701

R. J. Engelen and S. Serrar, European Centre for Medium-Range Weather Forecasts, Reading RG2 9AX, UK. (richard.engelen@ecmwf.int; soumia. serrar@ecmwf