Nature of the Ultraviolet Absorber in the Venus Clouds: Inferences Based on Pioneer Venus Data

@article{Pollack1979NatureOT,
  title={Nature of the Ultraviolet Absorber in the Venus Clouds: Inferences Based on Pioneer Venus Data},
  author={James B. Pollack and Boris Ragent and Robert W. Boese and Martin George Tomasko and Jacques Blamont and Robert G. Knollenberg and Larry W. Esposito and A. Ian F. Stewart and Lawrence Travis},
  journal={Science},
  year={1979},
  volume={205},
  pages={76 - 79}
}
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… 

The clouds of Venus: A synthesis report

The results presented represent a synthesis of data from those Pioneer Venus experiments directed toward studying cloud problems. These orbiter and multiprobe experiments show the cloud system to

Ultraviolet contrasts and the absorbers near the Venus cloud tops

The absorbers in the Venus atmosphere are not merely markers for the atmospheric motions; their absorption of incident sunlight determines the deposition of the energy which drives these motions.

The microphysics of the clouds of Venus: Results of the Pioneer Venus Particle Size Spectrometer Experiment

The results of the particle size spectrometer experiment on the Pioneer Venus sounder probe are presented. The vertical cloud structure is found to consist of three primary cloud regions of

The Structure of the Clouds of Venus: Results of the Pioneer Venus

The results of the nephelometer experiments conducted aboard the four probes of the Pioneer Venus mission are presented. The vertical structure of the clouds exhibits an upper haze region leading to

Scattering Properties of the Venusian Clouds Observed by the UV Imager on board Akatsuki

We analyze the albedo of Venus obtained from the UV Imager on board Akatsuki. A relative global mean albedo over phase angle is used in this study, and we confirm the glory feature at 283 and 365 nm

Further Results of the Pioneer Venus Nephelometer Experiment

Backscattering data for the nephelometer experiments conducted aboard the Pioneer Venus mission probes, including data up to the highest altitudes measured by the probes, are presented. A few small

References

SHOWING 1-10 OF 27 REFERENCES

Absorption of Sunlight in the Atmosphere of Venus

TLDR
In this report the fluxes measured by the solar flux radiometer (LSFR) of the Pioneer Venus large probe are compared with calculations for model atmospheres to determine flux profiles consistent with the measurements if an additional source of absorption is included in the upper cloud.

Temperature, Cloud Structure, and Dynamics of Venus Middle Atmosphere by Infrared Remote Sensing from Pioneer Orbiter

TLDR
One of the new discoveries is a "dipole" structure at high latitudes, with two hot spots rotating around the pole, surrounded by banks of cold cloud.

Orbiter Cloud Photopolarimeter Investigation

The first polarization measurements of the orbiter cloud photopolarimeter have detected a planet-wide layer of submicrometer aerosols of substantial visible optical thickness, of the order of 0.05 to

Clouds of Venus: A Preliminary Assessment of Microstructure

TLDR
Sedimentation and decomposition of H2SO4 in the droplets of the lower cloud region contribute more than 7 watts per square meter of heat flux equaling one-fourth of the solar net flux at 50 kilometers.

Ultraviolet photometry from the orbiting astronomical observatory. III - Observations of Venus, Mars, Jupiter, and Saturn longward of 2000 A.

A number of high-quality spectra of Mars, Jupiter, the combined disk and rings of Saturn, as well as lower-quality spectra of Venus, have been obtained with an objective-grating spectrometer of the

Electron Observations and Ion Flows from the Pioneer Venus Orbiter Plasma Analyzer Experiment

Additional plasma measurements in the vicinity of Venus are presented which show that (i) there are three distinct plasma electron populations—solar wind electrons, ionosheath electrons, and

Evidence for an Elemental Sulfur Component of the Clouds from Venus Spectrophotometry

The decrease in the reflectivity of Venus in the near-UV can be explained if the clouds contain particles of elemental sulfur in addition to sulfuric acid. The low-resolution McDonald-Pittsburgh

Interpretation of the polarization of Venus

Abstract The linear polarization of sunlight reflected by Venus is analyzed by comparing observations with extensive multiple scattering computations. The analysis establishes that Venus is veiled by