Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989georl..16..291f&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 16, April 1989, p. 291-294.
Astronomy and Astrophysics
Astronomy
29
Atmospheric Chemistry, Atmospheric Models, Carbon Monoxide, Photodissociation, Thermosphere, Venus Atmosphere, Absorption Cross Sections, Astronomical Spectroscopy, Molecular Rotation, Molecular Spectra, Venus, Photodissociation, Carbon Monoxide, Thermosphere, Absorption, Ionization, Comparisons, Atmosphere, Models, Spectroscopy, Temperature, Altitude, Wavelengths
Scientific paper
Recent investigations of CO photoabsorption demonstrate that photodissociation longward of the ionization threshold at 88.5 nm occurs primarily through line absorptions rather than continuous processes. High-resolution photoabsorption cross sections for CO at rotational temperatures near 250 K have been constructed from the improved data on dissociating transitions. The effects of the new cross sections on the rate of solar photodissociation of CO in the thermosphere of Venus are examined, and the results are compared to values obtained with the lower resolution cross sections available previously. It is found that the photodissociation profile peaks slightly higher in the atmosphere and the peak value and integrated total rate both decrease by about a factor of two.
Black John Harry
Fox Lewis J.
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