Electrical conductivity in the lower mantle: Constraints from CHAMP satellite data by time-domain EM induction modelling

2010 ◽  
Vol 180 (3-4) ◽  
pp. 111-117 ◽  
Author(s):  
Jakub Velímský
Keyword(s):  
Electrical Conductivity ◽  
Satellite Data ◽  
Time Domain ◽  
Lower Mantle ◽  
Champ Satellite ◽  
Em Induction

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

2021 ◽  
Vol 73 (1) ◽  
Author(s):  
Jakub Velímský ◽  
Ondřej Knopp
Keyword(s):  
Electrical Conductivity ◽  
Lower Mantle ◽  
Shear Velocity ◽  
Earth’S Mantle ◽  
Geophysical Parameter ◽  
Em Induction ◽  
Mantle Conductivity ◽  
Lateral Variations ◽  
Low Shear ◽  
Conductivity Models

AbstractThe 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.

scholarly journals Lateral Variations of Electrical Conductivity in the Lower Mantle Constrained by Swarm and CryoSat-2 Missions

2020 ◽  
Author(s):  
Jakub Velímský ◽  
Ondřej Knopp
Keyword(s):  
Electrical Conductivity ◽  
Lower Mantle ◽  
Shear Velocity ◽  
Earth’S Mantle ◽  
Geophysical Parameter ◽  
Em Induction ◽  
Mantle Conductivity ◽  
Lateral Variations ◽  
Low Shear ◽  
Conductivity Models

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 modelling 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.

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