On the detectability of 3-D postperovskite distribution in D '' by electromagnetic induction

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F12%3A10128377" target="_blank" >RIV/00216208:11320/12:10128377 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.pepi.2012.02.012" target="_blank" >http://dx.doi.org/10.1016/j.pepi.2012.02.012</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.pepi.2012.02.012" target="_blank" >10.1016/j.pepi.2012.02.012</a>

Result language
angličtina
Original language name
On the detectability of 3-D postperovskite distribution in D '' by electromagnetic induction
Original language description
1-D global inversions of observatory and satellite geomagnetic data reveal radial conductivity profiles in the Earth's mantle by means of electromagnetic induction. Traditionally, these have been interpreted as average values at given depth. However, thepredominant dipolar geometry of the magnetospheric ring current represents strong bias in 1-D interpretation of the responses of a fully 3-D heterogeneous Earth. We present a series of synthetic checks, applying 1-D time-domain inversion technique to 3-D simulated data for conductivity models with lateral heterogeneities in the lowermost mantle, ranging from simple geometrical configurations to complicated structures derived from phase composition based on geodynamical modelling. We show that it is thepresence or lack of lateral interconnection of the highly conductive phase in the direction of prevailing external currents that determines the results of 1-D inversion. In particular, this effect can explain the recently shown invisibil
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DE - Earth magnetism, geodesy, geography
OECD FORD branch
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Project
<a href="/en/project/GAP210%2F11%2F1366" target="_blank" >GAP210/11/1366: Transport Properties and Dynamics of the Earth's Lower Mantle</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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