Lateral variations of electrical conductivity in the lower mantle constrained by Swarm and CryoSat-2 missions

Earth, Planets and Space

Jakub Velímský¹  Ondřej Knopp¹ 

[1]Department of Geophysics, Faculty of Mathematics and Physics, Charles University

关键词: EM induction;    Mantle electrical conductivity;    Swarm;    CryoSat-2;   

DOI  :  10.1186/s40623-020-01334-8

来源: DOAJ

【 摘 要 】

Abstract 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.

【 授权许可】

Unknown