Summary
Calculation of the adiabatic-temperature distribution throughout the outer Earth's core and comparison of it with a realistic melting curve for iron clearly show that convection in the outer core is allowed, in spite of the uncertainty of some of the involved parameters. Estimates of the maximum possible conductive heat loss from the core to the mantle and the mean radial component of the convective velocity are presented.
Riassunto
Il calcolo della distribuzione adiabatica della temperatura nel nucleo esterno della Terra e il paragone di essa con la curva di fusione del ferro mostrano chiaramente che è permessa la convezione nel nucleo esterno, malgrado l'incertezza di alcuni dei parametri che appaiono nella teoria. Si presentano inoltre stime della massima perdita possibile di calore dal nucleo al mantello e della componente radiale media della velocità di convenzione.
Резюме
Вычисление адиабатического распределения температуры во внешнем ядре Земли и сравнение этого распределения с кривой плавления железа ясно показывают, что возможна конвекция во внешнем ядре, несмотря на неопределенности некоторых параметров, входящих в теорию. Проводятся оценки максимально возможного кондукционного отвода тепла от ядра к оболочке и средней радиальной компоненты скорости конвекции.
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Boschi, E. Convection in the Earth's core. Nuovo Cim B 28, 467–475 (1975). https://doi.org/10.1007/BF02726671
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DOI: https://doi.org/10.1007/BF02726671