Periodical characteristics of the geomagnetic secular variation and length-of-day variation
文献类型：期刊论文
| 作者 | Kang Guo-Fa1; Bai Chun-Hua2; Gao Guo-Ming1 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2008-03-01 |
| 卷号 | 51期号:2页码:369-375 |
| 关键词 | geomagnetic secular variation length-of-day wavelet transform periodicity |
| ISSN号 | 0001-5733 |
| 文献子类 | Article |
| 英文摘要 | Based on the historical geomagnetic model GUFM1 and the 10th International Geomagnetic Reference Field models (IGRF10) and the length-of-day data series, the secular variation of some parameters, including geomagnetic moment and its energy and westward drift etc, are analyzed with the wavelet transform method, in addition to the periodical components and time-varying characteristics of decadal length-of-day variation. As the results suggest that, during the period of 1800 similar to 2005, the 82-year and 48-year quasi-periodic components are available for the secular variation of dipole magnetic field, which are not directly related to the periodicity of the length-of-day variation. And both the 66-year and 32-year quasi-periodic components can be found for the secular variation of non-dipole magnetic field parameters and length-of-day variation, and the 66-year quasi-periodicity is stronger than the 32-year one. As far as the 66-year quasi-periodic component is concerned, the western drift exceeds the length-of-day 8.8 years; and the non-dipole magnetic field energy lags behind the length-of-day 15.6 years. We consider that the causality between the origins of the decadal length-of-day fluctuation and the geomagnetic secular variation can not be found. |
| WOS关键词 | WAVE-PROPAGATION ; EARTHS ROTATION ; SAMPLING THEORY ; WESTWARD DRIFT ; FIELD ; CORE ; FLUCTUATIONS ; DIPOLE ; 20TH-CENTURY ; COMPONENTS |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000254422000009 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/69119]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Kang Guo-Fa |
| 作者单位 | 1.Yunnan Univ, Dept Geophys, Kunming 650091, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Kang Guo-Fa,Bai Chun-Hua,Gao Guo-Ming. Periodical characteristics of the geomagnetic secular variation and length-of-day variation[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2008,51(2):369-375. |
| APA | Kang Guo-Fa,Bai Chun-Hua,&Gao Guo-Ming.(2008).Periodical characteristics of the geomagnetic secular variation and length-of-day variation.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,51(2),369-375. |
| MLA | Kang Guo-Fa,et al."Periodical characteristics of the geomagnetic secular variation and length-of-day variation".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 51.2(2008):369-375. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。