Solar heating of the Uranian mesopause by dust of ring origin

Details Solar heating of the Uranian mesopause by dust of ring origin Solar heating of the Uranian mesopause by dust of ring origin

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990icar...88..429r&link_type=abstract

Icarus (ISSN 0019-1035), vol. 88, Dec. 1990, p. 429-447.

Computer Science

11

Interplanetary Dust, Mesopause, Solar Heating, Uranus Atmosphere, Uranus Rings, Solar Energy, Temperature Profiles, Ultraviolet Spectrometers, Upper Atmosphere, Voyager Project

Scientific paper

Submicron dust absorption of visible-wavelength solar energy, in conjunction with inhibition of IR radiation, is assumed in the present estimate of the magnitude of an equatorial heat source due to such dust in the upper atmosphere of Uranus. The dust is noted to be capable of generating enough mesopause-level heat to account for heat sources observed only near the equator. Such dust is nevertheless excluded as a heat source for the 500-800 K thermospheric temperatures recorded by the Voyager UV spectrometer. The influx needed for a significant heat source corresponds to decomposition into submicron dust of about 100, 10-km diameter moons with 1.5 g/cu cm density; this is a plausible average dust flux for the rings of Uranus.

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