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

  • Shinko Aoki (a1) and Chuichi Kakuta (a2)
Abstract

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.

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Copyright
COPYRIGHT: © Reidel 1971
References
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Aoki, S.: 1967, Publ. Astron. Soc. Japan 19, 585 (Paper referred to as Paper 1 in the text).
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Proceedings of the International Astronomical Union
  • ISSN: -
  • EISSN: 0252-9211
  • URL: /core/journals/proceedings-of-the-international-astronomical-union
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