Effect of post-perovskite rheology on the thermal evolution of the Earth

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10330164" target="_blank" >RIV/00216208:11320/16:10330164 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.pepi.2015.11.004" target="_blank" >http://dx.doi.org/10.1016/j.pepi.2015.11.004</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.pepi.2015.11.004" target="_blank" >10.1016/j.pepi.2015.11.004</a>

Result language

angličtina

Original language name

Effect of post-perovskite rheology on the thermal evolution of the Earth

Original language description

Secular cooling of the Earth mantle is a complex process affected by many factors. Here we present the results of a modelling study focused on efficiency of cooling in the presence of theologically distinct post-perovskite. We evaluate combined effects of variable thermal expansivity and diffusivity, initial thermal condition and heat source model and concentrate on the effects of rheologically weak post-perovskite. Cooling of the core is included in the model core is assumed to be an isothermal heat reservoir with temperature controlled by heat flux through core-mantle boundary. Our 2D axisymmetric convection model has pressure, temperature and phase dependent viscosity and includes the effects of an endothermic phase transition at 660 km depth and an exothermic perovskite-post-perovskite phase transition in the lowermost mantle. In agreement with previous studies we conclude that depth-dependent material parameters tend to delay secular cooling. Presence of the weak post-perovskite on the other hand significantly enhances core cooling and its effect on core temperature is opposite and comparable in magnitude.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

DE - Earth magnetism, geodesy, geography

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

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

Name of the periodical

Physics of the Earth and Planetary Interiors

ISSN

0031-9201

e-ISSN

—

Volume of the periodical

251

Issue of the periodical within the volume

-

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

10

Pages from-to

1-10

UT code for WoS article

000370095500001

EID of the result in the Scopus database

2-s2.0-84955291083