Composition and Structure of the Venus Atmosphere: Results from Pioneer Venus

@article{Hoffman1979CompositionAS,
  title={Composition and Structure of the Venus Atmosphere: Results from Pioneer Venus},
  author={John H. Hoffman and R. Richard Hodges and Michael B. McElroy and Thomas M. Donahue and Marc A. Kolpin},
  journal={Science},
  year={1979},
  volume={205},
  pages={49 - 52}
}
Results from the Pioneer Venus sounder probe neutral mass spectrometer indicate that there is no difference in the isotopic ratios of carbon and oxygen between Venus and Earth to within � 5 percent. The mixing ratio of nitrogen is 3.5+3-2 percent with an isotopic ratio within 20 percent of that of Earth. The ratio of argon-36 to argon-40 is 85 percent, and the ratio of argon-38 to argon-36 is 20 percent. The mixing ratios of argon-36 and argon-40 are approximately 40 and 50 parts per million… 
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References

SHOWING 1-9 OF 9 REFERENCES
Venus Lower Atmospheric Composition: Preliminary Results from Pioneer Venus
Initial examination of data from the neutral mass spectrometer on the Pioneer Venus sounder probe indicates that the abundances of argon-36, argon-38, and neon-20 in the Venus atmosphere are much
The composition of the atmosphere at the surface of Mars
We have confirmed the discovery of N2 and 40Ar by the Entry Science Team, and we have also detected Ne, Kr, Xe, and the primordial isotopes of Ar. The noble gases exhibit an abundance pattern similar
Preliminary Results of the Pioneer Venus Nephelometer Experiment
TLDR
Tentative results from attempting to use the data from the nephelometer and cloud particle size spectrometer on the sounder probe to identify the indices of refraction of cloud particles in various regions of the Venus clouds are reported.
Clouds of Venus: Particle Size Distribution Measurements
TLDR
The discovery of large particles > 30 micrometers, significant particle mass loading, and size spectral features suggest that precipitation is likely produced; a peculiar aerosol structure beneath the lowest cloud layer could be residue from a recent shower.
Venus Lower Atmospheric Composition: Analysis by Gas Chromatography
TLDR
A comparison of the inventory of inert gases found in the atmospheres of Venus, Earth, and Mars suggests that these components are due to outgassing from the planetary interiors.
Klimond vitskiy
  • Astron. Zh
  • 1979
Work at the University of Texas at Dallas was M. KOLPIN supported by NASA contracts NAS2-8802 and NAS2-9485
  • 1973
Poll. MCELROY lack
  • Science
  • 1979