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Infrared spectroscopic measurements of the vertical column abundance of sulfur hexafluoride, SF6, from the groundThe solar observations involved in the present monitoring evaluation were made at two facilities, using Fourier-transform spectrometers achieving spectral resolutions of 0.005/cm and signal-to-rms noise ratios for individual scans from near 500 to near 1000. The monthly mean total vertical-column abundances of SF6 above both facilities are reported for time intervals from June 1986 to June 1990 and from March 1981 to June 1990. It is found that the vertical-column abundances increased at mean rates of 6.9 +/- 2.8 pct above one station and 6.6 +/- 7.2 pct above the other. Since all the results were retrieved using the same spectroscopic parameters and similar nonlinear least-squares curve-fitting algorithms validated through intercomparison exercises, the large error reported for the second station is attributed to a larger measurement uncertainty due to stronger H2O and C2O interferences, and a greater variability during each month.
Document ID
19910066690
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Zander, R.
(Liege Univ. Belgium)
Demoulin, P.
(Liege, University Ougree, Belgium)
Rinsland, C. P.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 14, 2013
Publication Date
August 20, 1991
Publication Information
Publication: Journal of Geophysical Research
Volume: 96
ISSN: 0148-0227
Subject Category
Environment Pollution
Accession Number
91A51313
Distribution Limits
Public
Copyright
Other

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