Experimental detection of the inner core translational triplet
文献类型：期刊论文
| 作者 | Xu, JianQiao ; Sun, HePing ; Zhou, JiangCun |
| 刊名 | Chinese Science Bulletin
 |
| 出版日期 | 2010 |
| 期号 | 3页码:276-283 |
| 中文摘要 | The translational oscillation of the solid inner core is one of the Earth's fundamental normal modes, which is also called Slichter mode. The normal mode should be split to form a triplet due to the Earth's rotation and ellipticity. In this study, according to the splitting pattern of Slichter mode, an attempt has been made to detect the possibility of Slichter triplet's existence by using the product spectra of the long-term continuous gravity measurements from the superconducting gravimeters (SG) at 6 globally-distributed permanent stations in the Global Geodynamics Projects network. The results indicate that the background noise level of the global SG observations is 0.0158 nms(-2) and the magnitude threshold of any global harmonic signals, which may be detected by the global SG, is 0.0152 nms(-2) in the subtidal frequency band from 0.162 to 0.285 cph in which Slichter triplet may occur. it implies that the signatures, related to the triplet, may be identified in the global SG observations, if they exist. It is found that there is a group of global harmonic signatures with the periods of 5.310, 4.995 and 4.344 h emerging significantly from the background noise in the global SG observations. They are in good agreement with the splitting pattern of Slichter mode. It implies that this group of signatures may be related to the inner core translational oscillations. The associated density contrast across the inner core boundary may be deduced as between the values provided in the Earth models of the PREM and 1066 A. |
| 原文出处 | |
| 公开日期 | 2012-04-11 |
| 源URL | [http://ir.whigg.ac.cn/handle/342008/3397]  |
| 专题 | 测量与地球物理研究所_其他_期刊论文 |
| 推荐引用方式 GB/T 7714 | Xu, JianQiao,Sun, HePing,Zhou, JiangCun. Experimental detection of the inner core translational triplet[J]. Chinese Science Bulletin,2010(3):276-283. |
| APA | Xu, JianQiao,Sun, HePing,&Zhou, JiangCun.(2010).Experimental detection of the inner core translational triplet.Chinese Science Bulletin(3),276-283. |
| MLA | Xu, JianQiao,et al."Experimental detection of the inner core translational triplet".Chinese Science Bulletin .3(2010):276-283. |
入库方式： OAI收割
来源：测量与地球物理研究所
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