外地核物质的状态参数方程  

The equation of state parameters in the Earth's outer core

作　　者：刘植凤[1] 杜国强[1] 李艳[1] 

机构地区：[1]石家庄经济学院地球动力研究所,河北石家庄050031

出　　处：《云南大学学报（自然科学版）》2009年第1期48-51,共4页Journal of Yunnan University(Natural Sciences Edition)

基　　金：河北省教育厅资助重点项目(ZH2006005);石家庄经济学院校内资助项目(200728)

摘　　要：在整个外地核空间内流体的对流存在狭窄的上升流通道(浮力团块上升至顶部)和宽阔的下降流通道(周围液体缓慢下降),假定这种对流循环相当快,以至于外地核接近于一个混合良好的等熵态,而各种物理量的偏离可以看作等熵态下的微扰.根据这一对流模型给出了外地核内下降部分物质的组分、温度、压力等状态参数的空间变化方程,以及与之密切相关的径向流体速度方程,并定性分析了各参量对外地核下降流体分层稳定性的贡献.It is assumed thatthe convective pattern in the bulk of outer core consists of buoyant parcels which rise to the top, forcing a broad descending flow in the bulk of the outer core. This convective circulation is sufficiently rapid that the outer core is close to a well-mixed adiabatic state. The small deviations from reference state results from the disturbance. With this convective model, it is studied the equation of parameters in the bulk of the outer core such as the radial variation of composition, the thermal deviation and pressure deviation. An equation of the vertical velocity was presented in order to calculate these parameters above and the strength of the stratification of the descending portions of the outer core was studied , which would be of importance to understand the radial variation of these parameters.

关 键 词：外地核 分层化 等熵态 热 地球动力学 

分 类 号：P311.9[天文地球—固体地球物理学]