The adiabatic gradient and the melting point gradient in the core of the Earth
The adiabatic gradient and the melting point gradient in the core of the Earth
复制标题
地核的绝热梯度和熔点梯度
DOI：
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发表时间：
1971
期刊：
影响因子：
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通讯作者：
G. Kennedy
中科院分区：
文献类型：
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作者：
G. Higgins;G. Kennedy
比较了整个地核的熔化梯度和绝热梯度。在相当于内核-外核边界的压力下，铁的熔化温度估计约为4250°C，通过外核的熔点梯度约为500°。通过外核的绝热梯度估计约为1250°;因此，外核要成为液体，其温度必须大大高于内外核边界的绝热平衡温度。整个外核的温度分布推导出遵循熔点曲线。这种温度分布应该对外核中对流的径向分量提供实质性的抑制。
The melting gradient and the adiabatic gradient throughout the core of the earth are compared. The temperature of melting of iron at pressures equivalent to the inner core-outer core boundary is estimated to be circa 4250°C with a melting point gradient of approximately 500° through the outer core. The adiabatic gradient through the outer core is estimated to be circa 1250°; therefore, for the outer core to be liquid, its temperature must be considerably above the temperature in adiabatic equilibrium with the inner-outer core boundary. The temperature distribution throughout the outer core is deduced to follow a melting point curve. This temperature distribution should provide a substantial inhibition to radial components of convection in the outer core.