Probing 3-D electrical conductivity of the mantle using 6 years of Swarm, CryoSat-2 and observatory magnetic data and exploiting matrix Q-responses approach

Open access
Date
2021-03-09Type
- Journal Article
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Cited 15 times in
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Cited 19 times in
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ETH Bibliography
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Abstract
This study presents results of mapping three-dimensional (3-D) variations of the electrical conductivity in depths ranging from 400 to 1200 km using 6 years of magnetic data from the Swarm and CryoSat-2 satellites as well as from ground observatories. The approach involves the 3-D inversion of matrix Q-responses (transfer functions) that relate spherical harmonic coefficients of external (inducing) and internal (induced) origin of the magnetic potential. Transfer functions were estimated from geomagnetic field variations at periods ranging from 2 to 40 days. We study the effect of different combinations of input data sets on the transfer functions. We also present a new global 1-D conductivity profile based on a joint analysis of satellite tidal signals and global magnetospheric Q-responses. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000474404Publication status
publishedExternal links
Journal / series
Earth, Planets and SpaceVolume
Pages / Article No.
Publisher
Springer NatureRelated publications and datasets
Is referenced by: https://doi.org/10.1186/s40623-021-01413-4
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Citations
Cited 15 times in
Web of Science
Cited 19 times in
Scopus
ETH Bibliography
yes
Altmetrics