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Deuterium content of the Venus atmosphereThe abundance of deuterium in the atmosphere of Venus is an important clue to the role of water in the planet's history, because ordinary and deuterated water escape the atmosphere at different rates. The high-resolution mode of the IUE was used to measure hydrogen Lyman-alpha emission from Venus, but only an upper limit on deuterium Lyman-alpha emission was found, from which was inferred a D/H ratio of less than 0.002-0.005. This is smaller by a factor of 3-8 than the D/H ratio derived from measurements by the Pioneer Venus Large Probe, and may indicate either a stratification of D/H ratio with altitude or a smaller overall ratio than previously thought.
Document ID
19890050194
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Bertaux, Jean-Loup
(CNRS Service d'Aeronomie, Verrieres-le-Buisson, France)
Clarke, John T.
(Michigan, University Ann Arbor, United States)
Date Acquired
August 14, 2013
Publication Date
April 13, 1989
Publication Information
Publication: Nature
Volume: 338
ISSN: 0028-0836
Subject Category
Lunar And Planetary Exploration
Accession Number
89A37565
Distribution Limits
Public
Copyright
Other

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