arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2201.05421physics.geo-ph
收藏

地核磁场的快速变化

Rapid Variations of Earth's Core Magnetic Field

V. Lesur, N. Gillet, M. D. Hammer, M. Mandea

摘要:

地球核心磁场快速变化的证据在地磁观测和卫星记录中都可以看到。在这里,我们介绍了它们是如何从地面观测记录中在地球表面被识别出来的,以及它们的时空结构是如何被卫星数据所表征的。它示出了如何通过本地化和全球建模过程中提取的核幔边界的属性,特别注意他们的时间尺度。最后,列出了液体外核中可能存在的波的类型,以及它们的主要性质,这些性质可能引起这些观测到的快速变化。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑