NORMAL MODES OF A ROTATING,ELLIPTICAL EARTH .2. NEAR-RESONANCE MULTIPLET COUPLING

被引：71

作者：

DAHLEN, FA

机构：

[1] Institute of Geophysics and Planetary Physics, University of California, Sun Diego

来源：

GEOPHYSICAL JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY | 1969年 / 18卷 / 04期

关键词：

D O I：

10.1111/j.1365-246X.1969.tb03576.x

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Certain of the Earth's poloidal and toroidal elastic‐gravitational normal mode multiplets may be strongly coupled to another multiplet by the Earth's rotation and ellipticity of figure. This paper uses Rayleigh's variational principle to specify the selection rules for strong mode coupling and to examine the nature and effects of this mode coupling. It is found that some of the normal modes of a slowly rotating, slightly elliptical Earth model may consist of about half poloidal type motion and half toroidal type motion. This strong coupling can severely hinder the problem of proper mode identification and measurement of the angular frequencies of oscillation of the Earth's normal modes. Copyright © 1969, Wiley Blackwell. All rights reserved

引用

页码：397 / &

共 21 条

[1]

[Anonymous], 1964, STUDIES OCEANOGRAPHY

[2] ROTATIONAL SPLITTING OF FREE OSCILLATIONS OF EARTH [J].