Evidence for weather on Neptune. I

Details Evidence for weather on Neptune. I Evidence for weather on Neptune. I

Jun 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...214..657j&link_type=abstract

Astrophysical Journal, Part 1, vol. 214, June 1, 1977, p. 657-662.

Astronomy and Astrophysics

Astrophysics

13

Infrared Spectra, Neptune (Planet), Planetary Atmospheres, Weather, Absorption Spectra, Cloud Cover, Line Spectra, Methane, Spectral Line Width, Spectral Reflectance, Spectrum Analysis

Scientific paper

Between April 1975 and March 1976 the reflectance of Neptune between 1 and 4 microns increased substantially. A spectrum taken at these wavelengths near the period of peak observed brightness showed a low-intensity continuum with weak superposed absorptions caused by CH4 and H2. Photographic spectra of the planet measured during the same period showed no differences from older published data. The gas abundances derived from the infrared spectrum, 5 plus or minus 2 km-amagat of H2 at a base density of 0.26 plus or minus 0.08 am and no more than about 1 m-am of CH4, appear to refer to an effective reflecting level high in the atmosphere of Neptune.

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