Nature of the ultraviolet absorber in the Venus clouds - Inferences based on Pioneer Venus data

Details Nature of the ultraviolet absorber in the Venus clouds - Inferences based on Pioneer Venus data Nature of the ultraviolet absorber in the Venus clouds - Inferences based on Pioneer Venus data

Jul 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979sci...205...76p&link_type=abstract

Science, vol. 205, July 6, 1979, p. 76-79.

Astronomy and Astrophysics

Astronomy

2

Atmospheric Attenuation, Photometry, Pioneer Venus Spacecraft, Radiative Transfer, Ultraviolet Absorption, Venus Clouds, Absorption Spectra, Albedo, Astronomical Models, Atmospheric Models, Graphs (Charts), Mathematical Models, Near Ultraviolet Radiation, Pioneer Venus 1 Spacecraft, Venus Atmosphere, Composition, Sulfur Oxides, Pioneer Venus, Probes, Photometry, Radiation, Wavelengths, Models, Ultraviolet, Venus, Clouds

Scientific paper

Several photometric measurements of Venus made from the Pioneer Venus orbiter and probes indicate that solar near-ultraviolet radiation is being absorbed throughout much of the main cloud region, but little above the clouds or within the first one or two optical depths. Radiative transfer calculations were carried out to simulate both Pioneer Venus and ground-based data for a number of proposed cloud compositions. This comparison rules out models invoking nitrogen dioxide, meteoritic material, and volatile metals as the source of the ultraviolet absorption. Models involving either small (approximately 1 micrometer) or large (approximately 10 micrometers) sulfur particles have same serious difficulties, while ones invoking sulfur dioxide gas appear to be promising.

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