Dynamo Models of Paleomagnetic Secular Variation

该项目将发电机理论的结果与高质量的来自湖泊沉积物的长期变化的古地磁时间序列分析相结合，目的是根据外核的动力学来解释整个全新世的磁场变化。研究包括两部分：(1)利用传播波场和驻波波场的动态一致性模型对北美、南美、澳大利亚和欧亚大陆已发表的古地磁长期变化数据进行分析；(2)对具有永久偶极场和共存长期变化的运动型发电机进行数值模拟。其目的是确定低频古地磁长期变化的来源，并确定其起源的外核的动力学结构。

This a project to combine results from dynamo theory with analysis of high quality paleomagnetic time series of secular variation derived from lake sediments, for the purpose of interpreting magnetic field variations through the Holocene in terms of the dynamics of the outer core. The research consists of two parts: (1) an analysis of published paleomagnetic secular variation data from North and South America, Australia and Eurasia using dynamically consistent models of propagating and standing wave fields, and (2) numberical simulations of kinematic dynamos with permanent dipolar fields and coexisting secular variation. The object is to identify the source of the low frequency paleomagnetic secular variation and to determine the dynamical structure of the outer core from which it originates.