Measurements of stratospheric halocarbon distributions using infrared techniques

Absorption bands of CF 2 Cl 2 , CFCl 3 and CCl 4 have been observed in infrared sunset solar spectra in the 800‐1000 cm −1 region from 30 km altitude during a balloon flight made in September 1975. The infrared absorption bands were used to derive the distribution of these constituents in the upper troposphere and lower stratosphere. The results are compared with 1968 data and with current results of other authors.