High altitude Venus haze from Pioneer Venus limb scans

Details High altitude Venus haze from Pioneer Venus limb scans High altitude Venus haze from Pioneer Venus limb scans

Apr 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983icar...54...48l&link_type=abstract

Icarus (ISSN 0019-1035), vol. 54, April 1983, p. 48-58.

Computer Science

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21

Haze, Particle Size Distribution, Pioneer Venus Spacecraft, Planetary Limb, Venus Atmosphere, Atmospheric Models, Atmospheric Sounding, Diffusion Coefficient, Refractivity, Turbulent Diffusion, Venus, Altitude, Haze, Pioneer Venus, Limbs, Observations, Orbiters, Pvo, Cloud Photopolarimeter, Wavelengths, Particles, Optical Properties, Depth, Scattering, Size, Sulfuric Acid, Layers, Intensity

Scientific paper

High-resolution limb scans of Venus made with the Orbiter Cloud Photopolarimeter aboard Pioneer Venus have been used to observe the high altitude Venus haze and its variation over almost one half a Venusian year. A model for a spherical atmosphere with tangential viewing geometry was used to analyze the observations and derive the haze properties. Values are found for the particle size and refractive index, particle number density and scale height, and eddy diffusion coefficient. Single scattering computations show good agreement with observed intensities for particles smaller than 0.3 micron radius and refractive index less than 1.7, consistent with, but not limited to, concentrated sulfuric acid. Particle scale height in the 0.5 to 2 mbar pressure regions varies between 1 and 3 km over the season, latitude, and local time ranges of the observations. Detached layers of haze are sometimes present. An average particle scale height of 2.2 km at 84 km altitude yields an eddy diffusion coefficient of 130,000 sq cm/sec.

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