Measurements of the infrared absorption cross-sections of haloalkanes and their use in a simplified calculational approach for estimating direct global warming potentials

The infrared absorption cross-sections and integrated band intensities (IBIs) for 21 haloalkanes: CFCl3 , CF2Cl2, CF2Br2, CH2F2, CHF2Cl, CHF2Br, CF3Br, CHCl2-CF2Cl, CHFCl–CFCl2, CHCl2–CF3, CHClBr–CF3, CHFCl–CF2Cl, CHFBr–CF3, CHF2–CF3, CH2Br–CF3, CH2F–CFCl2, CH2F–CF3, CH3–CCl3, CH3–CFCl2, CH3–CF2–CF3, and CHF2–CH2–CF3 were measured over the wavenumber range 400–1600 cm−1 at T = 295 K. The effect of air pressure on measured spectra was also investigated. These results are used to demonstrate a simple calculational approach for estimating the direct global warming potentials (GWPs) of such chemicals. The results obtained are compared with those derived from more comprehensive atmospheric modeling calculations appearing in the literature.