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Infrared Measurements of Atmospheric Ethane (C2H6) From Aircraft and Ground-Based Solar Absorption Spectra in the 3000/ cm RegionA number or prominent Q-branches or the upsilon(sub 7) band or C2H6 have been identified near 3000/ cm in aircraft and ground-based infrared solar absorption spectra. The aircraft spectra provide the column amount above 12 km at various altitudes. The column amount is strongly correlated with tropopause height and can be described by a constant mixing ratio of 0.46 ppbv in the upper troposphere and a mixing ratio scale height of 3.9 km above the tropopause. The, ground-based spectra yield a column of 9.0 x 10(exp 15) molecules/sq cm above 2.1 km; combining these results implies a tropospheric mixing ratio of approximately 0.63 ppbv.
Document ID
20000002898
Acquisition Source
Langley Research Center
Document Type
Reprint (Version printed in journal)
Authors
Coffey, M. T.
(National Center for Atmospheric Research Boulder, CO United States)
Mankin, W. G.
(National Center for Atmospheric Research Boulder, CO United States)
Goldman, A.
(Denver Univ. Denver, CO United States)
Rinsland, C. P.
(NASA Langley Research Center Hampton, VA United States)
Harvey, G. A.
(NASA Langley Research Center Hampton, VA United States)
Devi, V. Malathy
(College of William and Mary Williamsburg, VA United States)
Stokes, G. M.
(Battelle Memorial Inst. Richland, WA United States)
Date Acquired
August 19, 2013
Publication Date
April 1, 1985
Publication Information
Publication: Geophysical Research Letters
Publisher: American Geophysical Union
Volume: 12
Issue: 4
ISSN: 0094-8276
Subject Category
Environment Pollution
Report/Patent Number
Paper-5L6437
Funding Number(s)
CONTRACT_GRANT: NsG-1432
Distribution Limits
Public
Copyright
Other

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