Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9599043 | Journal of Quantitative Spectroscopy and Radiative Transfer | 2005 | 21 Pages |
Abstract
Collision-induced line narrowing, which has been discovered in the 1950s and investigated thoroughly in the laboratory since then, has yet never been taken into account in the spectroscopic remote sensing of the atmosphere. This work investigates the effect of collision-induced line narrowing onto the retrieval of HCl and HF vertical profiles from ground-based solar absorption FTIR measurements made at the NDSC station of the Jungfraujoch (46.5âN, 8âE and 3580Â m above see level). The retrievals are performed with the Atmosphit software, recently developed at the Université Libre de Bruxelles. It is presented in this paper for the first time and is validated against the widely used SFIT2 software. The impact of the line narrowing onto the retrieval of HCl and HF vertical profiles is examined relying on careful information content and error budget analyses. We report that the effect is relatively weak for HCl but significant for HF. Confirmation of the need to take the line narrowing into account for the retrieval of vertical profiles from ground-based FTIR spectra is given by comparison with data from the HALOE space borne instrument, rather insensitive to this spectroscopic effect.
Related Topics
Physical Sciences and Engineering
Chemistry
Spectroscopy
Authors
B. Barret, D. Hurtmans, M.R. Carleer, M. De Mazière, E. Mahieu, P.-F. Coheur,