Deuterium content of the Venus atmosphere

Details Deuterium content of the Venus atmosphere Deuterium content of the Venus atmosphere

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989natur.338..567b&link_type=abstract

Nature (ISSN 0028-0836), vol. 338, April 13, 1989, p. 567, 568. Research supported by NASA, CNRS, and University of Colorado.

Astronomy and Astrophysics

Astronomy

11

Astronomical Spectroscopy, Atmospheric Composition, Deuterium, Venus Atmosphere, Hydrogen, Iue, Lyman Alpha Radiation, Ratios, Venus, Deuterium, Atmosphere, Abundance, Water Vapor, Escape, Emissions, Satellite Observations, Iue Satellite, Lyman-Alpha Radiation, Pvo Mission, Uvs Instrument, Comparisons, Spectra, Layers, Depth, Isotopic Ratios

Scientific paper

The 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.

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