Numerous attempts have been made to interpret Earth's dynamic processes based upon heat transport concepts derived from ordinary experience. But, ordinary experience can be misleading, especially when underlain by false assumptions. Geodynamic considerations traditionally have embraced three modes of heat transport: conduction, convection, and radiation. Recently, I introduced a fourth, "mantle decompression thermal tsunami" that, I submit, is responsible for emplacing heat at the base of the Earth's crust. Here, I review thermal transport within the Earth and speculate that there might be a fifth mode: "heat channeling", involving heat transport from the core to "hot-spots" such as those that power the Hawaiian Islands and Iceland.
Considerations of Earth climate sensitivity based on peculiarities of planetary heat capacity using system identification method: Runaway greenhouse effect scenario is still possible
Institute of Cell Biophysics, Russian Academy of Sciences(俄罗斯科学院细胞生物物理研究所);The University of Akron(阿克伦大学);Lomonosov Moscow State University(莫斯科国立罗蒙诺索夫大学);Kurchatov Complex for Theoretical and Experimental Physics(库尔恰托夫理论与实验物理综合体)
Transport properties for liquid silicon-oxygen-iron mixtures at Earth's core conditions
我们报告的热和导电性的两种液体硅-氧-铁混合物(Fe $_{0.82}$ Si $_{0.10}$ O $_{0.08}$和Fe $_{0.79}$ Si $_{0.08}$ O $_{0.13}$),代表地球的外核的组成在相关的压力-温度条件下,从密度泛函理论计算与Kubo-Greenwood公式。我们发现导热系数$k$ =100(160)W m $^{-1}$ K $^{-1}$,以及外核顶部(底部)的电导率$σ= 1.1 (1.3) \times 10^6 Ω^{-1}$ m $^{-1}$。这些新的数值比以前的估计高出2至3倍,对我们理解地球的热历史和地球磁场的功能,包括整个地核的快速冷却速度或地核中高水平的放射性元素具有深远的影响。我们还展示了一些混合物的结构和动力学性质的结果,包括部分径向分布函数,均方位移,粘度和声速。
Effect of thermal conductivity on the simultaneous formation of a stable region at the top of Earth's core and magnetic field generation over four billion years
Electronic correlations and transport in iron at Earth's core conditions
地球内核条件下的铁的传输特性是地球物理建模的基本输入,但实验约束很差。在这里,我们表明,在这些条件下的铁的热导率和电导率仍然很高,即使电子-电子散射(EES)是适当考虑。这一结果是通过从头计算模拟,同时考虑到一贯的热无序和电子相关性。热无序抑制了体心立方铁相的非费米液体行为,因此降低了EES;该相的总计算热导率为220 Wm $^{-1}$ K $^{-1}$,EES降低不超过20%。EES和电子晶格散射交织在一起,导致随着EES的增加而打破Matthiessen规则。在六方密堆积铁的EES也没有增加热无序,仍然很弱。因此,我们的主要发现适用于内核中两种可能的铁相。