Wavelength dependence of polarization. XXXVII - Regional observations of Venus

Details Wavelength dependence of polarization. XXXVII - Regional observations of Venus Wavelength dependence of polarization. XXXVII - Regional observations of Venus

Sep 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979aj.....84.1419d&link_type=abstract

Astronomical Journal, vol. 84, Sept. 1979, p. 1419-1436.

Astronomy and Astrophysics

Astronomy

6

Optical Polarization, Planetary Mapping, Polarimetry, Venus Surface, Mie Scattering, Particle Size Distribution, Polarization Characteristics, Polarized Light, Ultraviolet Radiation, Venus Clouds, Vertical Distribution, Wavelengths, Venus, Wavelengths, Polarization, Mapping, Altitudes, Particles, Refractive Index, Anomalies, Cloud Layers, Data, Ultraviolet, Regions, Polar Regions, Radius, Aerosols, Gases, Visual Fringe Polarimeter, Photoelectric Polarimeter, Limbs, Size Distributions, Models, Scattering, Eq

Scientific paper

The mapping of the polarized light over the surface of Venus is examined. An upper haze layer at a 70 km altitude does not extend in latitude up to the poles, and temporary patches of anomalous polarization denote particle size variations that are not related to the clouds observed in UV. Variations of polarization directions may involve filamentary structures in the cloud configurations. The overall altitude of the cloud top layer and global increases of altitude are discussed, and it was shown that above the two polar regions, the altitude of the upper cloud layer is depressed by an amount variable with time by typically of the order of 3 to 5 km. The particle radius in these regions is variable with years, ranging from 0.75 to 1.65 microns, and these size variations involve the two poles approximately similarly.

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