3 
atmco2            OUT   LMDZ    ALL     Atmospheric CO2 concentration                                                                                              ppm
fCO2_nbp          IN    ORC     LMDZ    carbon_dioxide_expressed_as_carbon_due_to_all_land_processes_including_anthropogenic_land_use_change                       kgC.m-2.s-1
fCO2_fgco2        IN    NEMO    LMDZ    Surface_downward_mass_flux_of_carbon_dioxide_expressed_as_carbon                                                           kgC.m-2.s-1
