Ethane abundance on Neptune

Details Ethane abundance on Neptune Ethane abundance on Neptune

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990icar...88...87k&link_type=abstract

Icarus (ISSN 0019-1035), vol. 88, Nov. 1990, p. 87-96.

Computer Science

14

Atmospheric Composition, Ethane, Neptune Atmosphere, Abundance, Atmospheric Models, Infrared Spectroscopy, Optical Heterodyning

Scientific paper

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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