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Non-linear three dimensional spectral model of the Venusian thermosphere with super-rotation. I - Formulation and numerical technique. II - Temperature, composition and windsA three-dimensional spectral model for the Venusion thermosphere is presented which uses spherical harmonics to represent the horizontal variations in longitude and latitude and which uses Fourier harmonics to represent the LT variations due to atmospheric rotation. A differencing scheme with tridiagonal block elimination is used to perform the height integration. Quadratic nonlinearities are taken into account. In the second part, numerical results obtained with the model are shown to reproduce the observed broad daytime maxima in CO2 and CO and the significantly larger values at dawn than at dusk. It is found that the diurnal variations in He are most sensitive to thermospheric superrotation, and that, given a globally uniform atmosphere as input, larger heating rates yield a larger temperature contrast between day and night.
Document ID
19890060841
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Stevens-Rayburn, D. R.
(Applied Research Corp. Landover, MD, United States)
Mengel, J. G.
(Applied Research Corp. Landover, MD, United States)
Harris, I.
(Applied Research Corp. Landover, MD, United States)
Mayr, H. G.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 14, 2013
Publication Date
June 1, 1989
Publication Information
Publication: Planetary and Space Science
Volume: 37
ISSN: 0032-0633
Subject Category
Lunar And Planetary Exploration
Accession Number
89A48212
Distribution Limits
Public
Copyright
Other

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