Was Venus wet? Deuterium reconsidered

Details Was Venus wet? Deuterium reconsidered Was Venus wet? Deuterium reconsidered

Dec 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987sci...238.1702g&link_type=abstract

Science (ISSN 0036-8075), vol. 238, Dec. 18, 1987, p. 1702-1704.

Physics

20

Abundance, Deuterium, Moisture Content, Venus (Planet), Venus, Deuterium, Hydrogen, Water, Abundance, Isotopic Ratios, History, Evolution, Escape, Theoretical Studies, Hypotheses, Source

Scientific paper

The ratio of deuterium to hydrogen on Venus has been accepted as proof of a wetter, more Earth-like past on that planet. However, the present-day water abundance and the nonthermal hydrogen escape flux on Venus imply that hydrogen is in a steady state and that a hydrogen source, most likely cometary infall, is present. An alternative interpretation of the D/H ratio is offered, in which the measured value is consistent with a steady-state evolution over the age of the solar system. No past water excess is required to explain the isotopic data.

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