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The Equatorial and Polar Limb-Darkening of Venus in the 8–20 μm Region

Dinner, David J. (1978) The Equatorial and Polar Limb-Darkening of Venus in the 8–20 μm Region. Journal of the Atmospheric Sciences, 35 (12). pp. 2356-2361. ISSN 0022-4928. doi:10.1175/1520-0469(1978)035<2356:TEAPLD>2.0.CO;2.

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The spectral dependence of limb-darkening of Venus in the 8–20 μm region has been measured for both the equatorial and polar directions. It is shown that the magnitude and spectral variation of the polar darkening are, in general, greater than the equatorial darkening. The equatorial darkening, in fact, appears to be nearly spectrally invariant in this wavelength region, at least for the portion of the disk covered by the observations. The magnitude of the equatorial darkening is consistent with a temperature lapse rate of roughly 3 K km^(−1), assuming a model in which aerosol is distributed exponentially and mixed homogeneously with atmospheric gas.

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Additional Information:© 1979 American Meteorological Society. I am indebted to James Westphal for his advice and support during this observing program. I also thank Andrew Ingersoll, Duane Muhleman, Glenn Orton and Fredric Taylor for many helpful comments, and am grateful to Brad Bailey, Juan Carrasco, Kevin Jordan and Gary Tuton for assistance with the observations. This research was funded by NASA Grant NGL 05-002-003.
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NASANGL 05-002-003
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Caltech Division of Geological and Planetary Sciences3035
Issue or Number:12
Record Number:CaltechAUTHORS:20180312-134425037
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:85252
Deposited By: Ruth Sustaita
Deposited On:12 Mar 2018 21:02
Last Modified:15 Nov 2021 20:27

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