The electrical conductivity is an important geophysical parameter connected to the thermal, chemical, and mineralogical state of the Earth’s mantle. In this paper, we apply the previously developed methodology of forward and inverse EM induction modeling to the latest version of satellite-derived spherical harmonic coefficients of external and internal magnetic field, and obtain the first 3-D mantle conductivity models with contributions from Swarm and CryoSat-2 satellite data. We recover degree 3 conductivity structures which partially overlap with the shape of the large low-shear velocity provinces in the lower mantle.

中文翻译：

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受 Swarm 和 CryoSat-2 任务约束的下地幔电导率的横向变化

电导率是一个重要的地球物理参数，与地幔的热、化学和矿物状态有关。在本文中，我们将先前开发的正反电磁感应建模方法应用于最新版本的卫星导出的外部和内部磁场球谐系数，并获得了第一个 3-D 地幔电导率模型，这些模型来自 Swarm 和CryoSat-2 卫星数据。我们恢复了与下地幔中大的低剪切速度区的形状部分重叠的 3 级导电结构。