南大西洋地磁异常区的长期变化研究进展

被引：2
|
作者：
岳铫辰 [1 ,2 ]
魏勇 [1 ,2 ]
高佳维 [1 ,2 ]
何飞 [1 ,2 ]
戎昭金 [1 ,2 ]
王誉棋 [1 ,2 ]
机构：
[1] 中国科学院地质与地球物理研究所地球与行星物理重点实验室
[2] 中国科学院大学地球与行星科学学院
来源：
地球与行星物理论评(中英文) | 2024年 / 55卷 / 06期
关键词：
地球磁场; 南大西洋地磁异常区; 地球磁场长期变化;
D O I：
10.19975/j.dqyxx.2024-009
中图分类号：
P318 [地磁学];
学科分类号：
摘要：
南大西洋地磁异常区（South Atlantic Anomaly, SAA）是如今地球磁场最显著的结构特征之一，区域内存在磁场强度弱、辐射高、高能粒子通量增加等特点，并且该区域在近百年来持续进行向西漂移和面积扩张. SAA的长期变化影响了近地空间环境，反映了地球深部动力学特征，是研究地球磁场发电机的重要窗口.近年来地磁场表现出偶极子能量不断减弱、非偶极子能量正在增加的趋势，SAA表现出比历史时期更迅速的变化速度，各向异性有所增加，并出现了次级异常中心，这些新的变化说明SAA的演化可能进入了新的时期，引发人们对SAA长期演化规律以及未来演化趋势的关注和探讨.本文将结合古地磁与现代地磁模型研究结果，对SAA在过去、现在、未来的演化特征的研究结果进行总结，并对SAA的成因进行综述分析.
引用
收藏
页码：693 / 704
页数：12
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