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The deep atmosphere of Venus revealed by high-resolution nightside spectraThe first high-resolution spectroscopic observations of the night side of Venus obtained in two narrow spectral windows centered at 1.74 and 2.3 microns, where the nightside is anomalously bright, are reported. Absorption features from CO2, CO, H2O, HDO, HCl, HF, and COS are detected, and there are a number of unidentified features. A preliminary analysis indicates that the observed radiation is thermal emission from atmospheric layers in the eight-bar pressure region for the 2.3 micron window and even deeper at 1.7 micron. The derived CO and H2O abundances agree with in situ Pioneer measurements in the deep troposphere and are consistent with the high deuterium enrichment inferred from Pioneer data. The first measurements of HCl and HF below the clouds are reported along with the first firm detection of COS.
Document ID
19900050868
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Bezard, Bruno
(Observatoire de Paris-Meudon France)
De Bergh, Catherine
(Paris Observatoire, Meudon, France)
Crisp, David
(JPL Pasadena, CA, United States)
Maillard, Jean-Pierre
(CNR Institut d'Astrophysique, Paris, France)
Date Acquired
August 14, 2013
Publication Date
June 7, 1990
Publication Information
Publication: Nature
Volume: 345
ISSN: 0028-0836
Subject Category
Lunar And Planetary Exploration
Accession Number
90A37923
Distribution Limits
Public
Copyright
Other

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