Recent observations of HF and HCl in the upper stratosphere

Details Recent observations of HF and HCl in the upper stratosphere Recent observations of HF and HCl in the upper stratosphere

Apr 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981georl...8..413z&link_type=abstract

Geophysical Research Letters, vol. 8, Apr. 1981, p. 413-416. Research supported by the Chemical Manufacturers Association and C

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19

Atmospheric Chemistry, Balloon Sounding, Hydrochloric Acid, Hydrofluoric Acid, Infrared Spectroscopy, Stratosphere, Vapor Phases, Air Sampling, Balloon Flight, Density Measurement, Gas Density, Hydrogen Chlorides, Near Infrared Radiation, Upper Atmosphere

Scientific paper

Concentrations of gas phase hydrofluoric acid and hydrochloric acid have been determined in the upper stratosphere from near-infrared solar spectra recorded in the course of balloon flights from Palestine, Texas, in October 1978 and in September 1979. The average mixing ratios for HF deduced respectively from these flights are (4.8 plus or minus .3) x 10 to the -10th ppv above 30.3km and (6.2 plus or minus .5) x 10 to the -10th ppv above 36.8km. This observed difference is ascribed to an increase in the HF concentration out to at least 37km. The HCl mixing ratios deduced from the 1978 flight yield (4.5 plus or minus .6) x 10 to the -10th ppv at 21.7km, (7.5 plus or minus .7) x 10 to the -10th ppv at 27.5 km and (2.1 plus or minus .4) x 10 to the -9th ppv above 30.5km. Observations in 1979 imply an average HCl mixing ratio above 36.8km of (2.4 plus or minus .4) x 10 to the -9th ppv. Our data do not indicate a measurable temporal trend of the HCl concentration above 30km.

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