Secular variations in geomagnetic field caused by the fluctuations in the fluid flow in the outer-core
文献类型：期刊论文
| 作者 | Liu, QS; Zhu, RX; Pan, YX; Guo, B |
| 刊名 | CHINESE SCIENCE BULLETIN
 |
| 出版日期 | 1999-07-01 |
| 卷号 | 44期号:13页码:1214-1218 |
| 关键词 | r(0) geomagnetic Jerk length-of-day |
| ISSN号 | 1001-6538 |
| 文献子类 | Article |
| 英文摘要 | The theoretical spatial power spectrum of a dipole located at ( r(0), theta(0), phi(0)) can be fitted by a straight line in logarithmic scale when n is larger than 2. Based on the spherical harmonic coefficients of geomagnetic field during 1900-1995, the depth( r(0)) of source-layer of every 5a is calculated. The results show that r(0) decreased from 1900 to 1960; abruptly changed from 1945 to 1950 related to some kind of disturbance; decreased again from 1960 to 1975; increased from 1975 to 1985; and kept stable after 1985. Then the mean energy density (MED) of each year is Induced to ifs corresponding r(0). We find that MED of dipole field kept nearly unchanged from 1900 to 1960. While, MED of non-dipole field increased. The change of r(0) coinciding with the geomagnetic secular variation, impulse and length-of-day happened around 1970, suggesting that the change of r(0) may be related to the impulse. The variation in the fluid flow in the outer-core caused by the core-mantle coupling is a plausible candidate in explaining the changes in geomagnetic Jerk, length-of-day, and r(0). |
| WOS关键词 | MAGNETIC-FIELD ; MANTLE BOUNDARY ; MOTIONS ; SPECTRUM ; JERK |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000082955000014 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/75296]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Liu, QS |
| 作者单位 | Chinese Acad Sci, Inst Geophys, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, QS,Zhu, RX,Pan, YX,et al. Secular variations in geomagnetic field caused by the fluctuations in the fluid flow in the outer-core[J]. CHINESE SCIENCE BULLETIN,1999,44(13):1214-1218. |
| APA | Liu, QS,Zhu, RX,Pan, YX,&Guo, B.(1999).Secular variations in geomagnetic field caused by the fluctuations in the fluid flow in the outer-core.CHINESE SCIENCE BULLETIN,44(13),1214-1218. |
| MLA | Liu, QS,et al."Secular variations in geomagnetic field caused by the fluctuations in the fluid flow in the outer-core".CHINESE SCIENCE BULLETIN 44.13(1999):1214-1218. |
入库方式： OAI收割
来源：地质与地球物理研究所
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