Hostname: page-component-76fb5796d-qxdb6 Total loading time: 0 Render date: 2024-04-28T10:35:06.276Z Has data issue: false hasContentIssue false
  • English
  • Français

On the Long-Period Variations in the Rate of the Earth's Rotation

Published online by Cambridge University Press:  14 August 2015

A. I. Emetz  and
A. A. Korsun'
A. I. Emetz
Affiliation:
Main Astronomical Observatory, Ukrainian Academy of Sciences, Kiev, U.S.S.R.
A. A. Korsun'
Affiliation:
Main Astronomical Observatory, Ukrainian Academy of Sciences, Kiev, U.S.S.R.

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The maximum entropy power spectrum (Smylie, et al., 1974) of the Earth's rotational speed was calculated using data from 1900 to 1976. Two series of data were analyzed. The first was a series of δω/ω) determined from annual UT1 - ET data from 1900 to 1976. The second was a similar series derived from the mean monthly data of UT1 - TAI. Linear trends were removed from both series before analysis. Using the second series of data, significant periods of 2.8, 3.7, 7.0, and 10.5 years were found. The first series showed significant periods at 6, 10, 13, 22, and 57 years. Of these periodicities those at 22 and 57 years showed the largest amplitudes (0.454 ± 0.097 × 10−8 and 1.431 ± 0.104 × 10−8 respectively).

Type
Part I: Time
Information
Symposium - International Astronomical Union , Volume 82: Time and the Earth's Rotation , 1979 , pp. 59 - 60
Copyright
Copyright © Reidel 1979 

References

Afanas'eva, P. M., Kalinin, U. D., Molodenskij, M. S.: 1965, Geomagnetizm i Aeronomija 5, p. 795.Google Scholar
Afanas'eva, P. M.: 1966a, Geomagnetizm i Aeronomija 6, pp. 611–613.Google Scholar
Afanas'eva, P. M.: 1966b, Geomagnetizm i Aeronomija 6, p. 944.Google Scholar
Braginsky, S. I.: 1970, Geomagnetizm i Aeronomija 10, pp. 3–7.Google Scholar
Kalinin, Ya. D., Kiselev, V. M.: 1977, Geomagnetizm i Aeronomija 17, pp. 166–167.Google Scholar
Jady, R. J.: 1969, in Mansinha, L., Smylie, D. E., and Beck, A. E. (eds.), “Earthquake Displacement Fields and the Rotation of the Earth”, Springer-Verlag, New York, pp. 115–121.Google Scholar
Lambeck, K., Cazenave, A.: 1974, Geophys. J. Roy. Astron. Soc. 38, pp. 49–61.Google Scholar
Naito, I., Kikuchi, N.: 1973, Proc. Int. Latitude Obs. Mizusawa 13, pp. 179–191.Google Scholar
Smith, J.: 1974, VDI Nachr. 28, p. 31.Google Scholar
Smylie, D. E., Clarke, G. K., Ulrych, T.: 1973, Methods of Computational Physics, vol. 13, pp. 391–430.Google Scholar