The C-12/C-13 and O-16/O-18 ratios in the atmosphere of Venus from high-resolution 10-micron spectroscopy

Details The C-12/C-13 and O-16/O-18 ratios in the atmosphere of Venus from high-resolution 10-micron spectroscopy The C-12/C-13 and O-16/O-18 ratios in the atmosphere of Venus from high-resolution 10-micron spectroscopy

Dec 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987icar...72..623b&link_type=abstract

Icarus (ISSN 0019-1035), vol. 72, Dec. 1987, p. 623-634. CNRS-supported research.

Computer Science

7

Atmospheric Composition, Carbon Isotopes, Oxygen Isotopes, Satellite Observation, Venus Atmosphere, Abundance, Data Reduction, Infrared Spectrometers, Line Spectra, Mass Spectroscopy, Radiative Heat Transfer, Venus, Isotopic Ratios, Carbon, Oxygen, Atmosphere, Spectroscopy, Spectra, Absorption, Comparisons, Analysis, Earth-Based Observations, Telescope Methods, Radiative Transfer, Data Reduction, Carbon Dioxide, Thermal Properties, Emissions, Remote Sensing

Scientific paper

Spectra of Venus in the 925- to 980-cm-1 spectral range were recorded in January 1985 at a resolution of 0.06 cm-1. Several lines from the ν3 - ν1 bands of 13CO2 and 12C16O18O were observed for the first time. Synthetic spectra, which include absorption from CO2 bands and from sulfuric acid clouds, are compared to the observations. Taking into account measurement noise as well as systematic errors, the analysis yields 12C/13C = 86±12 and 16O/18O = 500±80, in agreement with the terrestrial ratios. The results are consistent with previous ground-based near-infrared studies and with in situ mass spectrometer measurements.

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