Vertical Column Abundances of COF2 Above the Jungfraujoch Station, Derived from Ground-Based Infrared Solar Observations |
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Authors: | F Melen E Mahieu R Zander C P Rinsland P Demoulin G Roland L Delbouille C Servais |
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Institution: | (1) Institute of Astrophysics, University of Liège, B-4000 Liège, Belgium;(2) NASA Langley Research Center, Atmospheric Sciences Division, Hampton, VA, 23665, U.S.A. |
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Abstract: | Total vertical column abundances of carbonyl fluoride (COF2) have been derived from observations made at the International Scientific Station of the Jungfraujoch (ISSJ; altitude 3.58 km, latitude 46.5°N, longitude 8.0°E), Switzerland. A systematic analysis of two microwindows containing lines of the 1 band was performed, based on a large set of high resolution infrared solar absorption spectra recorded with Fourier transform spectrometers, from 1985 to 1995. Examination of the whole available database indicates a significant increase of the burden of COF2 during the 1988–1995 period. The average exponential rate and the average linear rate referenced to 1992, calculated from daily mean measurements, are both equal to (4.0 ± 0.5)% yr-1 (one error). The results are also evaluated and discussed within the context of seasonal variability and correlation between carbonyl fluoride and hydrogen fluoride (HF) columns above the ISSJ. |
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Keywords: | carbonyl fluoride IR observations atmospheric composition |
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