Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...111..326p&link_type=abstract
Astronomy and Astrophysics, vol. 111, no. 2, July 1982, p. 326-332.
Astronomy and Astrophysics
Astrophysics
Angular Velocity, Earth Rotation, Mathematical Models, Solar Activity Effects, Least Squares Method, Root-Mean-Square Errors
Scientific paper
A trigonometric model by Luo Shi-fang et al. (1977) reproducing the decade variations in the length of day from 1821 to 1970 is reexamined and criticized with the aid of new data from 1971 to 1980. The possibility of a correspondence between periods, amplitudes, and phase angles from such model and from a similar one reproducing the Wolf numbers from 1749 to 1977 is investigated, in order to support the hypothesis of an influence of the solar activity on the earth's rotation. Works from previous authors on the subject are reviewed to add further arguments to the comparison.
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