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Diurnal CO variations in the Venus mesosphere from CO microwave spectraMicrowave spectra of CO in the Venus mesosphere were measured and analyzed in order to provide mixing profiles. The results indicate that there is a significant dependence of the observed spectra on the phase of Venus. This dependence is tied to a diurnal variation in the vertical profile of CO mixing ratios with the local solar zenith angle. Spectra of the nightside hemisphere are characterized by very little absorption in the wings of the spectra, yet very deep absorption in the line center. Dayside spectra exhibit considerably greater absorption in the line wings and less absorption in the line center. Solutions for the CO mixing profile derived from spectra show that the nightside atmosphere contains two to four times the CO abundance above about 95 km relative to the dayside atmosphere above 95 km. Conversely, the dayside atmosphere between 80 and 90 km shows two to four times the CO abundance for the same altitude region in the nightside atmosphere.
Document ID
19860037913
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Clancy, R. T.
(California Inst. of Tech. Pasadena, CA, United States)
Muhleman, D. O.
(California Institute of Technology Pasadena, United States)
Date Acquired
August 12, 2013
Publication Date
November 1, 1985
Publication Information
Publication: Icarus
Volume: 64
ISSN: 0019-1035
Subject Category
Lunar And Planetary Exploration
Accession Number
86A22651
Funding Number(s)
CONTRACT_GRANT: NGL-05-002-003
CONTRACT_GRANT: NSF AST-79-11806
Distribution Limits
Public
Copyright
Other

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