Increase of carbonyl fluoride (COF{sub 2}) in the stratosphere and its contribution to the 1992 budget of inorganic fluorine in the upper stratosphere

Journal Article · Sat Aug 20 04:00:00 EDT 1994 · Journal of Geophysical Research

DOI:https://doi.org/10.1029/94JD01029· OSTI ID:98848

Zander, R; Mahieu, E ^[1]; Rinsland, C P ^[2]; Gunson, M R; Farmer, C B; Abrams, M C ^[3]; Ko, M K.W. ^[4]

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1. Univ. of Liege (Belgium)
2. NASA Langley Research Center, Hampton, VA (United States)
3. California Institute of Technology, Pasadena, CA (United States)
4. AER Inc., Cambridge, MA (United States)

Volume mixing ratio profiles of COF{sub 2} have been derived through most of the stratosphere between 30{degrees}N and 54{degrees}S from series of 0.01-cm{sup {minus}1} resolution infrared solar spectra recorded in the occultation mode by the atmospheric trace molecule spectroscopy (ATMOS) instrument during the ATLAS 1 space shuttle mission of March-April 1992. When compared with similar results obtained from the ATMOS/Spacelab 3 mission of April-May 1985, the cumulative increase in the burden of COF{sub 2} in the middle and upper stratosphere was found to be 67% for that 7-year time interval. By combining a subset of these COF{sub 2} results with upper stratospheric concentrations of HF also derived from the ATMOS observations, it was further found that the budget of inorganic fluorine above 35 km altitude increased by (60 {+-} 10) % over the 1985-1992 time interval, which corresponds to an average exponential rate of increase of (6.7 {+-} 1.1) % yr{sup {minus}1}, or a linear rate of increase referenced to 1985 of (8.5 {+-} 1.3) % yr{sup {minus}1} at the 1{sigma} confidence level. The total inorganic F atom volume mixing ratio found in the upper stratosphere for 1985 and 1992 and the increase during this period mirror the rise in man-made fluorine-bearing compounds a the ground during the early to mid 1980s. This demonstrates the negligible impact of natural sources of fluorine, in particular volcanic activity, on the observed change of F in the upper stratosphere. Implications of the present findings and comparison with model results are discussed. 36 refs., 3 figs., 2 tabs.

• OSTI ID: 98848
• Journal Information: Journal of Geophysical Research, Journal Name: Journal of Geophysical Research Journal Issue: D8 Vol. 99; ISSN JGREA2; ISSN 0148-0227
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
ABUNDANCE
ATMOSPHERIC CHEMISTRY
CARBONYL RADICALS
INFRARED SPECTRA
MONITORING
STRATOSPHERE