Hostname: page-component-586b7cd67f-tf8b9 Total loading time: 0 Render date: 2024-11-29T17:53:32.224Z Has data issue: false hasContentIssue false
  • English
  • Français

The Excess Secular Change in the Obliquity of the Ecliptic and its Relation to the Internal Motion of the Earth

Published online by Cambridge University Press:  12 April 2016

Shinko Aoki  and
Chuichi Kakuta
Shinko Aoki
Affiliation:
Tokyo Astronomical Observatory, Mitaka, Tokyo, Japan
Chuichi Kakuta
Affiliation:
International Latitude Observatory, Mizusawa, Iwate, Japan

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.

Criticisms of the senior author’s paper (1967) are examined, and it is found that there still seems to be a possibility that the cause of the excess secular change is in the mantle-core coupling. Part II is devoted to an improvement of the previous result (Aoki, 1969) using a model of the elastic mantle and fluid core. In order to give the observed value of excess secular change of the obliquity, a value of the coupling coefficient of the Earth’s rotation is 3.5 times larger than Rochester’s (1968) value is required. This is not impossible from the geophysical view-point. In fact, if we take into account Hide’s argument (1969), then the coupling coefficient will be much larger than the present geophysical value.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 9: The IAU System of Astronomical Constants , October 1971 , pp. 171 - 181
Copyright
Copyright © Reidel 1971

References

Aoki, S.: 1965, Publ. Astron. Soc. Japan 17, 273.Google Scholar
Aoki, S.: 1967, Publ. Astron. Soc. Japan 19, 585 (Paper referred to as Paper 1 in the text).Google Scholar
Aoki, S.: 1969, Astron. J. 74, 284 (referred to as II).CrossRefGoogle Scholar
Clemence, G. M.: 1943, Astron. Papers 11, Part 1.Google Scholar
Duncombe, R. L.: 1958, Astron. Papers 16, Part 1.Google Scholar
Fricke, W.: 1952, Astron. Nachr. 280, 193.Google Scholar
Fricke, W.: 1967a, Astron. J. 72, 642.CrossRefGoogle Scholar
Fricke, W.: 1967b, Astron. J. 1368.Google Scholar
Fricke, W.: 1971, Celes. Mech. this issue, p. 150.Google Scholar
Hide, R.: 1967, Science 157, 55.Google Scholar
Hide, R.: 1969, Nature 222, 1055.Google Scholar
Kato, S.: 1968, Astrophys. Space Sci. 2, 37.Google Scholar
Kato, S.: 1970, Publ. Astron. Soc. Japan 22, 285.Google Scholar
Lieske, J. H.: 1970, Astron. Astrophys. 5, 90.Google Scholar
Miyamoto, M.: 1971, Publ. Astron. Soc. Japan 23, 21.Google Scholar
Molodensky, S.: 1961, Comm. Obs. Roy. Belgique, Ser. Geophys. 58, 25.Google Scholar
Munk, W. H. and McDonald, G. J. F.: 1960, The Rotation of the Earth, Cambridge, pp. 167–173.Google Scholar
Newcomb, S.: 1898, Astron. Papers 8, Part I and II.Google Scholar
Oort, J. H.: 1969, Private Communications.Google Scholar
Rochester, M. G.: 1968, J. Geomag. Geoelect. 20, 387.Google Scholar
Rochester, M. G. and Smylie, D. E.: 1965, Geophys. J. 10, 289.Google Scholar
Schmidt, M.: 1967, Private Communication.Google Scholar
Stacey, F. V.: 1970, Earthquake Displacement Fields and Rotation of the Earth, (ed. by Mansinha, L., Smylie, D. E., and Beck, A. E.), D. Reidel Publishing Co., Dordrecht, Holland, p. 176.Google Scholar