Role of the African magnetic anomaly in controlling the magnetic configuration and its secular variation
文献类型：期刊论文
| 作者 | Xu Wen-Yao; Bai Chun-Hua |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2009-08-01 |
| 卷号 | 52期号:8页码:1985-1992 |
| 关键词 | Geomagnetic field Nondipole field Planetary-scale magnetic anomaly Geomagnetic equator Westward drift |
| ISSN号 | 0001-5733 |
| DOI | 10.3969/j.issn.0001-5733.2009.08.005 |
| 文献子类 | Article |
| 英文摘要 | The configuration of the main magnetic field and its secular variation are greatly controlled by the nondipole field. It exhibits as 5 planetary-scale magnetic anomalies in Australia, Africa, Southern Atlantic Ocean, Eurasia continent, and North America, as well as a few minor anomalies. Only anomaly in the equatorial region is the African anomaly, which affects seriously the shape and position of the magnetic equator, pushing the equator northward for 15 degrees at maximum. The fast westward drift of African anomaly results in a remarkable secular variation cell ((Z) over dot(max) > 200 nT/a for 1900 similar to 2005) in Central America on the west of the anomaly. In addition, the secular variations of African and Southern Atlantic Ocean anomalies strongly distort the geomagnetic field of the western hemisphere, implying its relationship with the polarity reversed patches on the core-mantle boundary. |
| WOS关键词 | GEOMAGNETIC-FIELD REVERSAL ; MODELS ; CORE |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000269512600005 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/71828]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Xu Wen-Yao |
| 作者单位 | Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu Wen-Yao,Bai Chun-Hua. Role of the African magnetic anomaly in controlling the magnetic configuration and its secular variation[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2009,52(8):1985-1992. |
| APA | Xu Wen-Yao,&Bai Chun-Hua.(2009).Role of the African magnetic anomaly in controlling the magnetic configuration and its secular variation.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,52(8),1985-1992. |
| MLA | Xu Wen-Yao,et al."Role of the African magnetic anomaly in controlling the magnetic configuration and its secular variation".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 52.8(2009):1985-1992. |
入库方式： OAI收割
来源：地质与地球物理研究所
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