一个用于中尺度研究的非静力平衡模式
投稿时间:1986-04-06  修订日期:1986-06-23  点此下载全文
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潘建夫  
中文摘要:本文设计了一个用于中尺度研究的非静力平暂数值模式。在垂直运动方程中考虑非静力项后,为了减小由气压梯度力和重力计算浮力时的误差,模式引进了浮力方程。文中对中尺度环流系统的生成和维持作了一系列对比试验以考察该模式模拟中尺度过程的能力,结果发现,模式能反映中尺度系统生成和维持的一些特征。同时发现,对于较复杂的中尺度运动,初始扰动的发展与扰动本身的动力学和热力学结构有关。而大气稳定度分布对中尺度环流系统的维持起重要作用。通过试验还发现,积分过程中的计算稳定性对初始条件是敏感的。
 
A NON-HYDROSTATIC NUMERICAL MODEL FOR MESOSCALE STUDIES
Abstract:A non-hydrostatic numerical model is constructed for mesoscale studies,buoyancy equation being introduced into the model to reduce computational error of buoyancy. Control tests to verify the capability of the model to simulate the development and maintenance of the mesoscale circulation processes have been conducted. Characteristic features for generating and maintaining mesoscale systems are shown by the model qualitatively. It is found that. for more complex mesoscale systems, the development of the initial purturbation is related to its dynamical and thermodynamical structures but the maintenance of the systems relies more on the instability of the atmosphere. It is also found that computing stability is sensible to initial conditions.
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