Absorption of Sunlight in the Atmosphere of Venus

  title={Absorption of Sunlight in the Atmosphere of Venus},
  author={Martin George Tomasko and Lyn Doose and Peter H. Smith},
  pages={80 - 82}
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. If the large particles of the middle and lower clouds are assumed to be sulfur, strong, short-wavelength absorption results in a net flux profile significantly different from the LSFR net flux measurements. Models in which the smallest particles are assumed to be sulfur gave flux profiles consistent with the measurements if an additional… 
Measurements of the flux of sunlight in the atmosphere of Venus
The solar flux radiometer (LSFR) aboard the Pioneer Venus (PV) sounder probe measured the intensity of sunlight in five directions to the vertical using narrow angular fields of view. The
Distribution and source of the UV absorption in Venus' atmosphere
Information about the nature of the UV absorbing agents in Venus' atmosphere has been obtained from a comparison of model predictions with a variety of photometric data obtained from the Pioneer
Net radiation in the atmosphere of Venus: Measurements and interpretation
Net flux radiometer measurements in the atmosphere of Venus question the effectiveness of the greenhouse mechanism in maintaining the high surface temperature. To search for possible instrumental
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 Thermal Balance of Venus in Light of the Pioneer Venus Mission
Instruments flown on the Pioneer Venus orbiter and probes measured many of the properties of the atmosphere of Venus which control its thermal balance and support its high surface temperature.
Nature of the Ultraviolet Absorber in the Venus Clouds: Inferences Based on Pioneer Venus Data
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


Preliminary Results of the Solar Flux Radiometer Experiment Aboard the Pioneer Venus Multiprobe Mission
The solar flux radiometer aboard the Pioneer Venus large probe operated successfully during its descent through the atmosphere of Venus, implying that about 2 percent of the solar energy incident on the planet is absorbed at the ground.
Calculations of the Radiative and Dynamical State of the Venus Atmosphere
Abstract Modelling the atmosphere in accord with recent spacecraft and ground-based observations, we have carried out accurate, multiple scattering calculations to determine the solar energy
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
Multiple Scattering of Polarized Light in Planetary Atmospheres Part II. Sunlight Reflected by Terrestrial Water Clouds
Abstract The intensity and polarization of sunlight reflected by terrestrial water clouds are computed with the doubling method. The calculations illustrate that this method can be effectively used
First Results from the Large Probe Infrared Radiometer Experiment
Preliminary analysis has permitted us to estimate the infrared extinction coefficient profile attributable to aerosols, with respect to their visible profile, in the upper atmosphere of Venus and the water vapor mixing ratio below the clouds.
Structure of the Atmosphere of Venus up to 110 Kilometers: Preliminary Results from the Four Pioneer Venus Entry Probes
The four Pioneer Venus entry probes transmitted data of good quality on the structure of the atmosphere below the clouds, finding that the atmosphere is nearly isothermal around 100 kilometers (175 to 180 K) and appears to exhibit a sizable temperature wave between 60 and 70 kilometers.
Clouds of Venus: A Preliminary Assessment of Microstructure
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.
Clouds of Venus: Particle Size Distribution Measurements
The discovery of large particles > 30 micrometers, significant particle mass loading, and size spectral features suggest that precipitation is likely produced; a peculiar aerosol structure beneath the lowest cloud layer could be residue from a recent shower.