Thus, the entire mass of a given "parcel" of the atmosphere shares a single temperature -- you don't have different temperatures for CO2, O2, N2, etc. CO2 and the other greenhouse gases then radiate in all directions. ###>Thus, the entire mass of a given "parcel" of the atmosphere shares a single temperature -- you don't have different temperatures for CO2, O2, N2, etc. CO2 and the other greenhouse gases then radiate in all directions.