Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980icar...43..121s&link_type=abstract
Icarus, vol. 43, Aug. 1980, p. 121-127.
Astronomy and Astrophysics
Astronomy
3
Carbon Monoxide, Electron Transitions, Radio Astronomy, Stratosphere, Venus Atmosphere, Astronomical Spectroscopy, Millimeter Waves, Molecular Rotation, Night Sky, Photochemical Reactions, Pressure Broadening, Venus, Stratosphere, Carbon Dioxide, Observations, Mixing, Nightside, Dayside, Altitude, Temperatures, Photochemistry, Phase Angles, Models, Circulation, Absorption, Comparisons, Spectroscopy
Scientific paper
Carbon monoxide has been observed in the stratosphere of Venus at phase angles of 180 and 120 deg via the J = 0 - 1 rotational transition at 115.2712 GHz. The mixing ratio profile of CO has been obtained by fitting the theoretical spectrum produced by a small number of layers with constant CO mixing ratio to the line profile, and the results suggest that the CO mixing ratio below the 1-mb level increased by at least a factor of 10 between 180 and 120 deg phase angles. The depletion of CO on the nightside of the planet was not anticipated and may require either a new loss mechanism for CO which can operate without sunlight or an increase in the amount of vertical mixing on the nightside.
Irvine William M.
Robinson Sarah E.
Schloerb Peter F.
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