收稿日期: 1997-01-18
修回日期: 1997-03-21
网络出版日期: 1997-12-01
基金资助
国家攀登项目“现代地壳运动和地球动力学”和国家自然科学基金项目“地球自转运动与全球变化”(编号:19473110)资助。
DECADAL FLUCTUATIONS OF THE EARTH ROTATION AND POSSIBLE MECHANISMS OF THE CORE-MANTLE COUPLING
Received date: 1997-01-18
Revised date: 1997-03-21
Online published: 1997-12-01
李金岭,郑大伟,傅容珊 . 地球自转十年尺度波动与核幔耦合的可能机制[J]. 地球科学进展, 1997 , 12(6) : 514 -518 . DOI: 10.11867/j.issn.1001-8166.1997.06.0514
In this paper, the general characteristics of the Earth rotation variation and the possible geophysical excitation sources are briefly reviewed. The relations between the decadal fluctuations of the Earth rotation and the core mantle coupling is highlighted. Several possible mechanisms of the core mantle coupling are introduced. The detection of seismic waves is essential to our understanding of the Earth’s interior. In order to study and finally affirm various phenomena and the corresponding geophysical excitation factors, it is very important to comprehensively analyze the information from space geodesy, gravitational measurements and paleogeomagnetic records as well as results from geophysical studies of theories and models.
1 Hide R, Boggs D H, Dickey J O, et al.Topographic core-mantle coupling and polar motion on decadal time-scales.Geophys J Int, 1996, 125: 599-607.
2 Wilson C R. Contributions of water mass redistribution to polar motion excitation. In: Smith D E, Tourcotte D L,eds. Contributions of space geodesy to geodynamics: Earth dynamics. Am Geophys Un, Geodynamics Ser 24, Washington D C, 1993.77-82.
3 Dickey J O, Eubanks T M, Hide R. Interannual and decade fluctuations in the Earth' s Rotation. In: McCarthy D D,Carter W E, eds. Variations in Earth Rotation. Geophysical Monograph 59, Agu, 1990. 157-161.
4 Hide R. The topographic torque on the bounding surface of a rotating gravitating fluid and the excitation by core motions of decadal fluctuations in the Earth' s rotation. Geophys Res Lett, 1995, 22: 961-964; 3563-3565.
5 Hide R, Dickey J O. Earth' s variable rotation. Science, 1991, 253: 629-637.
6 Voorhies C V. Coupling an inviscid core to an electrically insulating mantle. J Geomag Geoelectr, 1991, 43: 131-156.
7 Greff-Lefftz M, Legros H. Core-mantle coupling and polar motion. Phys Earth Planet Inter, 1995, 91: 273-283.
8 Paulus M, Stix M. Electromagnetic core-mantle coupling. In: Cazenave A, Reidel D, Dordrecht, eds. Earth Rotation: Solved and Unsolver Problems. 1986. 259-267.
9 Hide R. Interaction of the Earth' s liquid core and solid mantle. Nature, 1969, 222:1055-1056.
10 Malin S R C, Hide H. Bumps on the core-mantle boundary: geomagnetic and gravitational evidence revisited. Phil Trans R Soc Lon, 1982, A306: 281-289.
11 Song X D, Richards P G. Seismological evidence for differential rotation of the Earth' s inner core. Nature, 1996,382: 221-224.
12 Zhang C Z, Xia Y F. Remarks on dynamical ellipticity at the Earth' s core-mantle boundary. Earth, Moon and Planets, 1994, 65: 269-276.
13 Herring T A, Buffet B A, Mathews P M, et al. Forced nutations of the Earth: Influence of inner core dynamics 3.Very long baseline interferometry data analysis. J Geophys Res, 1991, 96: 8259-8274.
14 Mathews P M, Shapiro I I. Estimation of outer-and inner-core parameters from nutation and tidal data. In: Geophysics and the Environment. Abstracts Week B, IUGG XXI General Assembly, Boulder, Colorado, July 2-14,1995. B22.
15 de Vries D, Wahr J M. The effects of the solid inner core and nonhydrostatic structure on the Earth' s forced nutations and Earth tides. J Geophys Res, 1991, 96:8275-8293.
/
| 〈 |
|
〉 |