COMPARISON OF HF AND HCL VERTICAL PROFILES FROM GROUNDBASED HIGH-RESOLUTION INFRARED SOLAR SPECTRA WITH HALOGEN OCCULTATION EXPERIMENT OBSERVATIONS

HCl and HF vertical mixing ratio (VMR) profiles have been retrieved fr om very high resolution, ground-based infrared solar absorption spectr a taken from Denver, Colorado. The VMR profile retrieval is based on a n iterative inversion algorithm, which incorporates a line-by-line lay er-by-layer calculation for the forward model. The method has been suc cessfully applied to both simulated and measured solar spectra. The HC l and HF profiles retrieved from the ground-based solar spectra are co mpared with the profiles measured by the UARS Halogen Occultation Expe riment (HALOE) instrument for the same day near 40 degrees N latitude. The ground-based HF profile agrees very well with the HALOE results. The HCl profiles agree with HALOE within the combined of error limits but are higher by 5 to 20%.