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Venus cloud properties: Infrared opacity and mass mixing ratioBy using the Mariner 5 temperature profile and a homogeneous cloud model, and assuming that CO2 and cloud particles are the only opacity sources, the wavelength dependence of the Venus cloud opacity is inferred from the infrared spectrum of the planet between 450 and 1250/cm. Justification for applying the homogeneous cloud model is found in the fact that numerous polarization and infrared data are mutually consistent within the framework of such a model; on the other hand, dense cloud models are not satisfactory. Volume extinction coefficients varying from 0.000005 to 0.000015/cm depending on the wavelength, are determined at the tropopause level of 6110 km. By using all available data, a cloud mass mixing ratio of approximately 0.000005 and a particle concentration of about 900 particles per cu cm at this level are also inferred. The derived cloud opacity compares favorably with that expected for a haze of droplets of a 75% aqueous solution of sulfuric acid.
Document ID
19740022176
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
Authors
Samuelson, R. E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Hanel, R. A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Herath, L. W. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kunde, V. G. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Maguire, W. C. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 3, 2013
Publication Date
June 1, 1974
Subject Category
Space Sciences
Report/Patent Number
X-622-74-191
NASA-TM-X-70713
Accession Number
74N30289
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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