The effect of the differential rotation of the earth inner core on the free core nutation

被引：0

作者：

Mian Zhang ^{[1
,2
]}

Chengli Huang ^{[1
,2
]}

机构：

[1] Key Laboratory of Planetary Sciences,Shanghai Astronomical Observatory,Chinese Academy of Sciences

[2] School of Astronomy and Space Sciences,University of Chinese Academy of Sciences

来源：

Geodesy and Geodynamics | 2019年 / 02期

基金：

中国国家自然科学基金;

关键词：

Inner core; Differential rotation; Free core nutation;

D O I：

暂无

中图分类号：

P137.2 [岁差和章动理论];

学科分类号：

070402 ;

摘要：

Seismic observations shows that the inner core rotates faster than the mantle and the rotation axis of the inner core may not align with the rotation axis of the mantle. Free core nutation reflects core’s information. We discuss the effect of the inner core’s differential rotation on free core nutation from two aspects: rotation speed and deflection angle. Our result shows it is in accordance with the observations when the inner core’s rotation speed doesn’t exceed 10° faster than mantle’s per year, and the deflection angle is less than 1°,if the rotation speed and the deflection angle are respectively considered separately.

引用

页码：146 / 149

页数：4

共 4 条

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