ANALYSIS OF RAMAN SCATTERED LY- alpha EMISSIONS FROM THE ATMOSPHERE OF URANUS.

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Abstract

A line at 1280 Angstrom, due to Raman scattering of solar Lyman alpha (Ly- alpha ) in the atmosphere of Uranus, has been detected by the Voyager Ultraviolet Spectrometer. The measured intensity of 40 plus or minus 20 R implies that 200 R to 500 R of the measured 1500 R Ly- alpha intensity at the sub-solar point is due to Rayleigh scattering of the solar line. The presence of Rayleigh and Raman scattering at 1216 Angstrom suggests that the Uranian atmosphere is largely devoid of absorbing hydrocarbons above the 0. 5 mbar level. The most natural explanation of this depletion is very weak vertical mixing equivalent to an eddy coefficient on the order of 200 cm**2 s** minus **1 between 0. 5 mbar and 100 mbar.

Original languageEnglish (US)
Pages (from-to)483-486
Number of pages4
JournalGeophysical Research Letters
Volume14
Issue number5
StatePublished - May 1987

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Uranus (planet)
Uranus
Rayleigh scattering
scattering
Raman spectra
ultraviolet spectrometers
atmospheres
atmosphere
depletion
hydrocarbons
vortices
vertical mixing
eddy
spectrometer
coefficients
hydrocarbon
analysis

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

Cite this

ANALYSIS OF RAMAN SCATTERED LY- alpha EMISSIONS FROM THE ATMOSPHERE OF URANUS. / Yelle, Roger; Doose, L. R.; Tomasko, Martin G.

In: Geophysical Research Letters, Vol. 14, No. 5, 05.1987, p. 483-486.

Research output: Contribution to journalArticle

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