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

Alexey Kuvshinov*, Alexander Grayver, Lars Tøffner-Clausen, Nils Olsen

*Corresponding author for this work

    Research output: Contribution to journalJournal articleResearchpeer-review

    275 Downloads (Pure)

    Abstract

    This study presents results of mapping three-dimensional (3-D) variations of the electrical conductivity in a depths range from 400 to 1200 km using six 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 coecients of external (inducing) and internal (induced) origin of the magnetic potential. Transfer functions were estimated from geomagnetic eld variations at periods ranging from 2 to 40 days. We study the eect of dierent combinations of input data sets on the transfer functions. We also present a new global 1-D conductivity prole based on a joint analysis of satellite tidal signals and global magnetospheric Q-responses.
    Original languageEnglish
    Article number67
    JournalEarth, Planets and Space
    Volume73
    Number of pages26
    ISSN1343-8832
    DOIs
    Publication statusPublished - 2021

    Bibliographical note

    This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

    Keywords

    • Electromagnetic induction
    • Three-dimensional conductivity models
    • Matrix Q-responses
    • Inversion
    • Time-varying magnetic field
    • Magnetospheric ring-current source
    • Satellite data
    • Observatory data

    Fingerprint

    Dive into the research topics of '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'. Together they form a unique fingerprint.

    Cite this