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EARTH’S CORE EVOLUTION AND GEODYNAMO
1 Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
2 Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation, Russian Academy of Sciences
2 Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation, Russian Academy of Sciences
Journal: Geophysical processes and biosphere
Tome: 20
Number: 1
Year: 2021
Pages: 68-76
UDK: 550.383
DOI: 10.21455/GPB2021.1-7
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RESHETNYAK M.Y. EARTH’S CORE EVOLUTION AND GEODYNAMO // . 2021. Т. 20. № 1. С. 68-76. DOI: 10.21455/GPB2021.1-7
@article{RESHETNYAKEARTH’S2021,
author = "RESHETNYAK, M. Y.",
title = "EARTH’S CORE EVOLUTION AND GEODYNAMO",
journal = "Geophysical processes and biosphere",
year = 2021,
volume = "20",
number = "1",
pages = "68-76",
doi = "10.21455/GPB2021.1-7",
language = "English"
}
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Keywords: evolution of the Earth, liquid core, Earth’s energetics, entropy, geodynamo, Carnot cycle
Аnnotation: The paper considers the sequential selection of parameters in the model of cooling the Earth's core. The model describes the evolution of the core since its formation after accretion 4.5 billion years ago, the appearance of a solid core, and also assumes extrapolation by 1.5 billion years into the future. It is shown how the imposed conditions, in particular, the size and age of the solid core, the requirements imposed by the geodynamo, change the process of cooling and growth of the solid core. Scenarios of evolution are considered when the appearance of a solid core does not lead to significant variations in the energy available for the generation of the magnetic field and the efficiency of the dynamo mechanism introduced by analogy with the Carnot cycle.
