Westward drift of the geomagnetic anomaly in East Asia
文献类型：期刊论文
| 作者 | Wei, ZG; Xu, WY |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2000 |
| 卷号 | 43期号:1页码:45-52 |
| 关键词 | East Asia geomagnetic anomaly westward drift correlation analysis secular variation |
| ISSN号 | 0001-5733 |
| 文献子类 | Article |
| 英文摘要 | The westward drift is one of the most important characteristics of the secular variation in the Earth's main magnetic field. The most obvious westward drift occurs in the non-dipole magnetic fields. In this paper we analyzed East Asia geomagnetic anomaly by using the correlation analysis of moving random pattern based on the International Geomagnetic Reference Field (IGRF) from 1900 to 2000. The time variations of geomagnetic drift vector are obtained for X, Y and Z component anomalies. Z component anomaly, which illustrates best the geomagnetic drift, drifted westward at a velocity of 0.07 degrees/a in the 100 years. This is obviously slower than the global average westward drift of 0.2 degrees/a. In addition the Z component anomaly slowly drifted northward at a speed of 0.07 degrees/a. Further analyses indicate that there are three stages of the drift of East Asia geomagnetic anomaly. First, the westward drift was fast from 1900 to 1930, with an average speed of 0.10 degrees/a, Then, the drift changed northwest from 1930 to 1980. The westward speed was 0.07 degrees/a and northward speed was 0.04 degrees/a during this period. Finally, the drift almost stopped after 1980, and may change eastward. |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000085091200006 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/76355]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Wei, ZG |
| 作者单位 | Chinese Acad Sci, Inst Geol & Geophys, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wei, ZG,Xu, WY. Westward drift of the geomagnetic anomaly in East Asia[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2000,43(1):45-52. |
| APA | Wei, ZG,&Xu, WY.(2000).Westward drift of the geomagnetic anomaly in East Asia.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,43(1),45-52. |
| MLA | Wei, ZG,et al."Westward drift of the geomagnetic anomaly in East Asia".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 43.1(2000):45-52. |
入库方式： OAI收割
来源：地质与地球物理研究所
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