Concentrations of hydrogen chloride and hydrogen fluoride measured during the MAP/GLOBUS campaign of September 1983

Within the context of the MAP/GLOBUS campaign of September 1983, several trace species have been observed by absorption spectroscopy at the two ground stations of the Jungfraujoch, Switzerland (3580 m altitude) and the Observatoire de Haute-Provence, France (1905 m altitude). The results obtained for HCl and for HF, expressed in terms of mean integrated columns above these sites are: Jungfraujoch: (2.1 ± 0.2) E15 mol cm−2 HCl (4.8 ± 0.2) E14 mol cm−2 HF Haute-Provence: (2.6 ± 0.2) E15 mol cm−2 HCl. Taking into account the difference in the altitude of the two stations, the reported HCl results are in agreement to within their respective uncertainties. The integrated column density of HCl and HF above 11 km altitude, deduced from airplane observations on 9 September 1983, are: (1.65 ± 0.25) E15 mol cm−2 HCl above 11 km (3.7 ± 1.7) E14 mol cm−2 HF above 10 km supporting satisfactorily the ground measurements.