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Recent observations of HF and HCl in the upper stratosphere
Author(s) -
Zander R.
Publication year - 1981
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl008i004p00413
Subject(s) - stratosphere , mixing ratio , hydrofluoric acid , hydrochloric acid , atmospheric sciences , analytical chemistry (journal) , mixing (physics) , atmosphere (unit) , chemistry , environmental science , materials science , meteorology , geology , physics , environmental chemistry , inorganic chemistry , quantum mechanics
Concentrations of gas phase hydrofluoric‐ and hydrochloric acid have been determined in the upper stratosphere from near‐infrared solar spectra recorded in the course of balloon fights from Palestine, Texas, USA (32°N latitude), in October 1978 and in September 1979. The average mixing ratios for HF deduced respectively from these flights are (4.8±.3)×10 −10 ppv above 30.3km and (6.2±.5)×10 −10 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±.6)×10 −10 ppv at 21.7km, (7.5±.7)×10 −10 ppv at 27.5 km and (2.1±.4)×10 −9 ppv above 30.5km. Observations in 1979 imply an average HCl mixing ratio above 36.8km of (2.4±.4)×10 −9 ppv. Our data do not indicate a measurable temporal trend of the HCl concentration above 30km.