Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83.3113a&link_type=abstract
Journal of Geophysical Research, vol. 83, July 1, 1978, p. 3113-3124.
Astronomy and Astrophysics
Astronomy
Infrared Astronomy, Planetary Temperature, Thermal Mapping, Venus Atmosphere, Diurnal Variations, Limb Darkening, Temperature Distribution, Venus, Maps, Infrared, Temperatures, Atmosphere, Absorption, Radiation, Emission, Thermal Properties, Spectrum
Scientific paper
A detailed analysis of the published Venus IR maps has been performed and a number of new results have been obtained. The global contour map of the average temperature variations in the vicinity of 6120 km reveals the existence of saddle points along the equator at dawn, at noon, and just before sunset. The hot spots observed at 4:30-4:40 A.M. at 65 deg to 68 deg S latitude appear to be in the vicinity of the coldest region from which the 8- to 14-micron emissions originate. At large earth zenith angles the limb darkening curves show a hump which is attributed primarily to a single patchy haze layer in the vicinity of 6123 km and with a thickness of the order of 3 km. An average IR source region temperature of 250 K is obtained at the equator. At the poles the same altitude region is 8 K cooler.
Ainsworth J. E.
Herman Jay R.
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