论文标题
地球核心磁场的快速变化
Rapid Variations of Earth's Core Magnetic Field
论文作者
论文摘要
在磁性天文台和卫星记录中都可以看到地球核场快速变化的证据。我们在这里介绍了如何从地面观测记录中从地球表面鉴定出它们，以及它们的时空结构现在如何以卫星数据为特征。它显示了如何通过局部和全局建模过程提取核心地幔边界的性质，从而特别注意其时间尺度。最终，列出了液体外芯中可能的波的类型，以及它们的主要特性，可能引起这些观察到的快速变化。
Evidence of fast variations in the Earth's core field are seen both in magnetic observatory and satellite records. We present here how they have been identified at the Earth's surface from ground-based observatory records and how their spatio-temporal structure is now characterised by satellite data. It is shown how their properties at the core mantle boundary are extracted through localised and global modelling processes, paying particular attention to their time scales. Finally are listed possible types of waves in the liquid outer core, together with their main properties, that may give rise to these observed fast variations.
