Determination of three-dimensional distribution of electrical conductivity in the Earth’s mantle from Swarm satellite data: Time-domain approach

One of the primary goals of the Swarm multisatellite mission is to determine the 3-D distribution of electrical conductivity in the Earth’s mantle. This paper presents an inversion method based on direct integration of magnetic fields in the time domain, and using the adjoint solution for fast evalu...

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Vydáno v:Earth, planets, and space Ročník 65; číslo 11; s. 1239 - 1246
Hlavní autor: Velímský, Jakub
Médium: Journal Article
Jazyk:angličtina
Vydáno: Berlin/Heidelberg Springer Berlin Heidelberg 01.01.2013
Springer Nature B.V
Témata:
Earth and Environmental Science
Earth mantle
Earth Sciences
Geology
Geophysics/Geodesy
Magnetic fields
mantle conductivity anomalies
time domain
3-D inversion
3-D electromagnetic induction
ISSN:1343-8832, 1880-5981
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Popis
Shrnutí:One of the primary goals of the Swarm multisatellite mission is to determine the 3-D distribution of electrical conductivity in the Earth’s mantle. This paper presents an inversion method based on direct integration of magnetic fields in the time domain, and using the adjoint solution for fast evaluation of data sensitivities to model perturbations. Two tests of the method are presented. The first one is using a 3-D checkerboard conductivity model and noise-free synthetic data. The second test is based on the closed-loop simulation of Swarm mission, including recovery of external and induced fields from simulated data along satellite tracks, and realistic noise estimates.
Bibliografie:SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 14
ISSN:1343-8832
1880-5981
DOI:10.5047/eps.2013.08.001