Palaeomagnetic constraints on the geometry of the geomagnetic field during reversals
Palaeomagnetic constraints on the geometry of the geomagnetic field during reversals
复制标题
反转期间地磁场几何形状的古地磁约束
DOI：
10.1038/356400a0
复制
发表时间：
1992
期刊：
影响因子：
64.8
通讯作者：
L. Meynadier
中科院分区：
文献类型：
--
作者：
J. Valet;P. Tucholka;V. Courtillot;L. Meynadier
古地磁记录的路径的极在地球磁场的逆转提供了一个测试的假设，即双极或低阶轴对称分量的领域占主导地位的逆转。在过去的1200万年里，多次反转记录显示没有简单或一致的地理模式。虽然一个更强大的分析的过渡领域等待更多的分布良好的采样点，目前的数据并不与最简单的模型，其中一个领域让人想起非偶极组件的现代领域成为主导不一致。
Palaeomagnetic records of the path of the pole during reversals of the Earth's magnetic field provide a test of the hypothesis that dipolar or low-order axisymmetric components of the field dominate during reversals. Multiple records of reversals during the past 12 Myr show no simple or consistent geographical pattern. Although a more robust analysis of the transitional field awaits a greater number of well-distributed sampling sites, the present data are not inconsistent with the simplest models, in which a field reminiscent of the non-dipole component of the present-day field becomes dominant.