| 地球内核的动力学理论及章动效应 |
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| 引用本文： | 张捍卫,许厚泽,郑勇,张超.地球内核的动力学理论及章动效应[J].云南大学学报(自然科学版),2002,24(4):294-298. |
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| 作者姓名： | 张捍卫 许厚泽 郑勇 张超 |
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| 作者单位： | 1. 中国科学院测量与地球物理研究所,湖北武汉,430077
2. 郑州信息工程大学测绘学院大地测量系,河南郑州,450052 |
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| 基金项目： | 国家自然科学基金资助项目 ( 4 0 1740 0 2 ) |
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| 摘 要： | 地球固体内核与其其余部分之间的引力和压力的耦合作用将引起一内力矩,内核通过这一力矩影响岩石圈相对惯性空间的定向.讨论了一个弹性无海洋、球形分层的内核地球章动理论,将内核的作用明确地反映在公式中.并依据Mathews et al的内核地球动力学理论,讨论了归一化章动振幅的Mathews形式和Wahr形式的应用;通过PREM地球模型检测了内核对章动振幅的影响,由此发现本文的结果与Mathews et al的结果存在一定的差异,但都在亚毫角秒量级上影响主要的圆章动项.
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| 关 键 词： | 地球内核 地球自转 自由核章动 内核摆动 |
| 文章编号： | 0258-7971(2002)04-0294-05 |
| 修稿时间： | 2001年5月22日 |
Dynamic theory of the Earth's inner core and nutation efficiency |
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| ZHANG Han-wei,XU Hou-ze,ZHENG Yong,ZHANG Chao.Dynamic theory of the Earth''''s inner core and nutation efficiency[J].Journal of Yunnan University(Natural Sciences),2002,24(4):294-298. |
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| Authors: | ZHANG Han-wei XU Hou-ze ZHENG Yong ZHANG Chao |
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| Institution: | 1. Institute of Geodesy and Geophysics of Chinese Academy, Wuhan 430077, China;2. Department of Geodesy, Institute of Surveying and Mapping, The Information Engineering University, Zhengzhou |
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| Abstract: | There exist relationship between the Earth’s inner core and the Earth’s rotation.Because of the inner core of the Earth,there will have two new nutation modes related to the Earth’s rotation,i.e.a prograde free core nutation (PFCN) mode and a inner core wobble (ICW) mode.Based on the inner core nutation theory of the Earth by Mathew’s et al the applications of normaliged nutation amplitude of Mathew’s type and Whar’s one are discussed,By the PREM Earth’s model,the influence of the inner core to the vibration rangeof nutation is checked,the main solution is that the inner core has effects to the main nutation terms in 0.1 mas,which is coincide with recent observation precision. |
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| Keywords: | Earth's inner core Earth's rotation free core nutation inner core wobble |
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