| 1996年初次华南暴雨过程的数值模拟及其分析 |
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| 引用本文： | 王建捷,郭肖容.1996年初次华南暴雨过程的数值模拟及其分析[J].应用气象学报,1997,8(3):257-268. |
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| 作者姓名： | 王建捷 郭肖容 |
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| 作者单位： | 1.国家气象中心 |
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| 摘 要： | 文章运用新近开发的双向嵌套的MM5中尺度模式，在国家气象中心的CRAY-C92巨型机环境下，对1996年4月中旬末的华南暴雨过程进行了高分辨率数值模拟和敏感性试验。结果表明，该模式比较成功地模拟了这次暴雨过程及相关的中尺度系统的发生发展；凝结潜热通过一个类似于CISK的机制对暴雨过程的发生发展产生了至关重要的作用；低空西南急流为暴雨的发生发展输送了潜在不稳定能量，并在与暴雨的相互作用中得以维持和加强；初始时刻（暴雨发生前12小时）南海北部—华南地区低层潜在不稳定能量的储备是暴雨发生不可缺少的条件。
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| 关 键 词： | 暴雨 中尺度系统 数值模拟 物理机制 |
Numerical Simulation of the Earliest Torrential Rain Event over South China in 1996 |
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| Wang Jianjie,Guo Xiaorong.Numerical Simulation of the Earliest Torrential Rain Event over South China in 1996[J].Quarterly Journal of Applied Meteorology,1997,8(3):257-268. |
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| Authors: | Wang Jianjie Guo Xiaorong |
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| Institution: | 1.(National Meteorological Center, Beijing 100081) |
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| Abstract: | The earliest torrential rain event over South China in 1996 is simulated, and a series of sensitivity experiments are carried out using a nested grid version of PSU/NCAR’s mesoscale model (MM5) with a fine mesh grid size of 20 km. It is shown that the MM5 model reproduces successfully the development of the torrential rain and mesoscale system; latent heat release acts a vital role in the development of the torrential rain event by a mechanism similar to CISK; the low-level southwest jet transports potential unstable energy to the torrential rain region, and interacts with torrential rain to maintain and strengthen itself; the store of the low-level potential unstable energy over the South China Sea and the South China region at initial time (12 h before the occurrence of the torrential rain) is a crucial condition for the formation of the torrential rain |
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| Keywords: | Torrential rain Mesoscale system Numerical simulation Physical mechanism |
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