"Climate and Forecast (CF)" . . . "atmosphere mass content of hcfc22" . " \"Content\" indicates a quantity per unit area. The \"atmosphere content\" of a quantity refers to the vertical integral from the surface to the top of the atmosphere. For the content between specified levels in the atmosphere, standard names including content_of_atmosphere_layer are used. The chemical formula for HCFC22 is CHClF2. The IUPAC name for HCFC22 is chloro-difluoro-methane." . .