Physics – Optics
Scientific paper
Mar 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993icar..102...62k&link_type=abstract
Icarus (ISSN 0019-1035), vol. 102, no. 1, p. 62-75.
Physics
Optics
3
Atmospheric Optics, Halos, Ice, Polarimetry, Upper Atmosphere, Venus Atmosphere, Atmospheric Composition, Optical Polarization, Venus Clouds, Venus, Atmosphere, Polarimetry, Ice, Crystals, Polarization, Depth, Anomalies, Wavelengths, Scattering, Halos, Distribution, Calculations, Earth-Based Observations, Timescale, Sulfuric Acid, Contamination, Haze
Scientific paper
Halo polarimetry has been used to detect fluctuations in the Venus polarization with time scales ranging from less than an hour to years. For one type of fluctuation, characterized by a decreased polarization lasting one or two days but occurring only at long wavelengths, the most likely cause is Venus passing through a scattering angle range with decreased polarization. There are rapid time fluctuations superposed on the dip which seem to be due to transient atmospheric phenomena. Venus meteorology is also responsible for the fluctuation width of the dip. The last type of short-term polarization fluctuations identified is attributed to a transient atmospheric feature. The observations show the potentials of halo polarimetry as a diagnostic for detecting birefringent crystals in planetary atmospheres.
Konnen Gunther P.
Schoenmaker A. A.
Tinbergen Jaap
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