Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985em%26p...32....1h&link_type=abstract
Earth, Moon, and Planets (ISSN 0167-9295), vol. 32, Feb. 1985, p. 1-7.
Astronomy and Astrophysics
Astronomy
2
Earth Albedo, Lunar Luminescence, Solar Activity, Solar Magnetic Field, Correlation, Stratosphere, Twilight Glow
Scientific paper
An analysis of 1210 visual brightness estimations of the Moon's ashen light is presented, performed by a working group of amateur astronomers from June 1972 to December 1973. In the Moon phase interval 0.1 ≤ Tb ≤ 0.7 the brightness expressed in a semi-empirical scale, SG, is found to be linearly related to the phase. Monthly deviations from the mean brightness show well defined winter maxima (January) and summer minima (July). Within the referenced period the brightness of the ashen light tends to increase, whereas the solar magnetic activity decreased. In addition, minor correlations and, respectively, anti-correlations are found at stratospheric temperature and, respectively density. On account of the nature of the ashen light its variations are regarded as fluctuations of the Earth's albedo.
Hilbrecht Heinz
Küveler Gerd
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