NASA NTRS · 19910031719
Ethane abundance on Neptune
Abstract
IR spectroscopic measurements of the C2H6 RR (4,5) emission line at 840.9764/cm have been used to infer Neptune's ethane mole fractions; while the resulting value is lower than that obtained by Orton et al. (1987), it lies within their 2-sigma error bounds. The present results are also found to require 2.0-5.8 times more ethane in the 0.02-2 mbar pressure region than predicted by the Romani and Atreya (1989) photochemical model. Better agreement is obtainable through a reduction of eddy mixing in the lower stratosphere and/or an increase of stratospheric temperature by more than 10 K above the 6-mbar level.
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Kostiuk, Theodor, Espenak, Fred, Romani, Paul, Zipoy, David, Goldstein, Jeff. 1990-11-01. Ethane abundance on Neptune. https://ntrs.nasa.gov/citations/19910031719
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