| 中尺度对流系统演变中的非线性对流对称不稳定 |
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| 引用本文： | 寇正,陆汉城.中尺度对流系统演变中的非线性对流对称不稳定[J].大气科学,2005,29(4):636-644. |
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| 作者姓名： | 寇正 陆汉城 |
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| 作者单位： | 解放军理工大学气象学院,南京,211101;解放军理工大学气象学院,南京,211101 |
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| 基金项目： | 国家自然科学基金;国家重点基础研究发展计划(973计划) |
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| 摘 要： | 应用ARPS(Advanced Regional Prediction System)模式用数值试验的方法分析了中尺度对流系统中非线性对流-对称不稳定的发展, 结果表明, 非线性对流-对称不稳定的发展过程首先是对流的发展, 为对称不稳定的发展创造了条件, 而对称不稳定发展的结果使对流组织化, 环流加强, 生命史增长, 并且对流发展与对称不稳定的释放存在一个正反馈过程, 从而给出了其中物理过程相互作用的概念模型.
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| 关 键 词： | 中尺度对流系统 非平衡动力学 非线性对流-对称不稳定 |
| 文章编号： | 1006-9895(2005)04-0636-09 |
The Nonlinear Convective-Symmetric Instability During the Development of Mesoscale Convective System |
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| KOU Zheng and LU Han-Cheng.The Nonlinear Convective-Symmetric Instability During the Development of Mesoscale Convective System[J].Chinese Journal of Atmospheric Sciences,2005,29(4):636-644. |
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| Authors: | KOU Zheng and LU Han-Cheng |
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| Abstract: | The development of nonlinear convective-symmetric instability in the mesoscale convective system is analyzed by numerical experiments using ARPS (Advanced Regional Prediction System). The results show that, for the developing process of nonlinear convective-symmetric instability, at the beginning, convection develops, and it prepares the condition for the development of symmetric instability, then, the evolution of symmetric instability makes the convection systematization, strengthens the circulation and keeps the convection for a long time. There is a positive feedback between convection development and release of symmetric instability, and accordingly the concept of the interaction between the physical processes is presented |
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| Keywords: | mesoscale convective system unbalanced dynamics nonlinear convective-symmetric instability |
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