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Detailed Reference Information |
Zander, R., Rinsland, C.P. and Demoulin, P. (1991). Infrared spectroscopic measurements of the vertical column abundance of sulfur hexafluoride, SF6, from the ground. Journal of Geophysical Research 96: doi: 10.1029/91JD01214. issn: 0148-0227. |
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The unresolved &ngr;3 band Q branch of sulfur hexafluoride, SF6, at 947.9 cm-1 has been identified and quantitatively analyzed in series of high-quality infrared solar spectra recorded at the International Scientific Station of the Jungfraujoch, Switzerland, and at the National Solar Observatory facility on Kitt Peak in Arizona. Series of monthly mean total vertical column abundances of SF6 above both stations, deduced from that feature with line-by-line nonlinear least squares fitting methods, are reported over the time intervals from June 1986 to June 1990 for the Jungfraujoch and from March 1981 to June 1990 for Kitt Peak. Assuming an exponential growth model for fitting these series of measurements, it is found that the vertical column abundances have increased at mean rates of 6.9¿2.8% /yr above the Jungfraujoch (calculated columns of 2.99¿1013 molecules/cm2 in June 1986 and 3.94¿1013 molecules/cm2 in June 1990) and 6.6¿7.2%/yr above Kitt Peak (calculated columns equal to 2.97¿1013 molecules/cm2 in June 1981 and 5.38¿1013 molecules/cm2 in June 1990), the uncertainties corresponding to 2 sigma confidence levels. These results are further discussed within the context of variability and compared with previously published measurements. ¿ American Geophysical Union 1991 |
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Abstract |
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Keywords
Atmospheric Composition and Structure, Evolution of the atmosphere, Atmospheric Composition and Structure, Pollution—urban and regional, Atmospheric Composition and Structure, Troposphere—composition and chemistry |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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