The vertical distribution of CHClF₂ (CFC‐22) in the stratosphere

This paper presents the first measurements of the vertical distribution of CFC‐22 in the stratosphere resulting from gas chromatography‐mass spectrometry (GC‐MS) of air samples collected cryogenically between 10 and 33 km altitude, at 44°N. Results from 2 balloon flights carried out on September 20, 1982, and on September 10, 1983, are shown and compared with a theoretical profile computed by means of a 1‐D model. Our results demonstrate that CFC‐22 mixing ratios decrease more slowly with height than many other halocarbons indicating that this hydrohalocarbon may become an important source of ClO x radicals in the upper stratosphere.