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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DE - Zemský magnetismus, geodesie, geografie

OECD FORD obor

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Projekt

<a href="/cs/project/GAP210%2F11%2F1366" target="_blank" >GAP210/11/1366: Materiálové vlastnosti a dynamika spodního pláště Země</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physics of the Earth and Planetary Interiors

ISSN

0031-9201

e-ISSN

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Svazek periodika

202

Číslo periodika v rámci svazku

AUGUST

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

71-77

Kód UT WoS článku

000308776000007

EID výsledku v databázi Scopus

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