Ground-based IR observation of oxygen isotope ratios in the Venus atmosphere

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N. Iwagami, G.L. Hashimoto, S. Ohtsuki, S. Takagi, S. Robert

Planetary and Space Science
available online 12 November 2014

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The deviations of the isotope fractions are found to be δ17O=+92±158‰ and δ18O=−42±85‰ as compared to the terrestrial standard (HITRAN 2012) where the uncertainties include both random and systematic errors. Such combination agrees with the Earth-Moon fractionation line within the errors. This is consistent to the fact that the proto-Venus matter was also well mixed with the proto-Earth-Moon matter.

Correlation plot of δ17O and δ18O in Earth-Moon, Mars and Venus

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