Minimum heat flow from the core and thermal evolution of the Earth
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10421620" target="_blank" >RIV/00216208:11320/20:10421620 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=LuD.nGqUaF" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=LuD.nGqUaF</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.pepi.2020.106457" target="_blank" >10.1016/j.pepi.2020.106457</a>
Alternative languages
Result language
angličtina
Original language name
Minimum heat flow from the core and thermal evolution of the Earth
Original language description
The role of heat flow coming from the core is often overlooked or underestimated in simple models of Earths thermal evolution. Throughout most of Earth's history, the mantle must have been extracting from the core at least the amount of heat that is required to operate the geodynamo. In view of recent laboratory measurements and theoretical calculations indicating a higher thermal conductivity of iron than previously thought, the above constraint has important implications for the thermal history of the Earths mantle. In this work we construct a paramaterized mantle convection model that treats both the top and the core-mantle boundary heat fluxes according to the boundary layer theory, or alternatively employs the model of Labrosse (2015) to compute the thermal evolution of the Earths core. We show that the core is likely to provide all the missing heat that is necessary in order to avoid the so-called "thermal catastrophe" of the mantle. Moreover, by analyzing the mutual feedback between the core and the mantle, we provide the necessary ingredients for obtaining thermal histories that are consistent with the petrological record and have reasonable initial conditions. These include a sufficiently high viscosity contrast between the lower and upper mantle, whose exact value is sensitive to the activation energy that governs the temperature dependence of the viscosity.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10500 - Earth and related environmental sciences
Result continuities
Project
<a href="/en/project/GA17-01464S" target="_blank" >GA17-01464S: Constraining Earth’s radiogenic heat production using particle geoscience: geoneutrinos and noble gases</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physics of the Earth and Planetary Interiors
ISSN
0031-9201
e-ISSN
—
Volume of the periodical
305
Issue of the periodical within the volume
March
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
17
Pages from-to
106457
UT code for WoS article
000537861300003
EID of the result in the Scopus database
2-s2.0-85085239703