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首页> 外文期刊>Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System >Plume heat flow is much lower than CMB heat flow
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Plume heat flow is much lower than CMB heat flow

机译：羽流热流远低于CMB热流

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摘要

Plumes rising from the core-mantle boundary (CMB) are often assumed to transport most, or all, of the heat conducted across the CMB. Here this assumption is explored using numerical convection models in idealized geometries that lead to a single plume under steady-state or near steady state conditions. Plume heat transport is calculated for different internal heating rates using two methods and compared to the CMB heat flux. For these conditions, it is found that the heat flux transported by plumes in the upper mantle is only a fraction of the core heat flux and, thus, core beat flow estimates derived from observed hotspots could be multiplied by a factor of several. (c) 2005 Elsevier B.V. All rights reserved.
机译：通常认为从芯幔边界（CMB）冒出的烟气会传导通过CMB的大部分或全部热量。在此，使用数值对流模型在理想的几何形状中探索了该假设，该几何形状在稳态或接近稳态条件下会导致单个羽状流。使用两种方法针对不同的内部加热速率计算出羽流传热，并将其与CMB热通量进行比较。对于这些条件，发现上地幔中的羽流输送的热通量仅是岩心热通量的一部分，因此，从观察到的热点得出的岩心拍流估计值可以乘以几倍。 （c）2005 Elsevier B.V.保留所有权利。

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