NUMERICAL SIMULATION AND MESOSCALE ANALYSIS OF A TORRENTIAL RAIN CAUSED BY TYPHOON
NUMERICAL SIMULATION AND MESOSCALE ANALYSIS OF A TORRENTIAL RAIN CAUSED BY TYPHOON
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一次台风暴雨的数值模拟与中尺度分析
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发表时间：
2008
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利用AREM模式成功模拟了台风“爱尔”（0418）登陆福建时的一次强降雨。通过空间带通滤波对模拟结果进行尺度分离，揭示了对此次降雨过程有直接影响的中尺度低压和辐合线。分析了这两个中尺度系统的物理特征及其与降雨的关系。研究表明，暴雨降水与中尺度辐散和辐合产生的强上升气流有较好的对应关系，是中尺度系统与地形特征相互作用的结果，是暴雨降水的直接原因。
A heavy storm rainfall caused by Typhoon Aere (No.0418) when landing at Fujian has been successfully simulated by using AREM model. The simulation result is scale-separated by spatial band-pass filtering, which reveals the mesoscale low pressure and convergence line that has direct impact on this rainfall process. The physical characteristics of the two mesoscale systems and their relation with rainfall are also analyzed. Study shows that there exists a well corresponding relationship between the storm rainfall and mesoscale divergence and strong updraft arising from the convergence, which is caused by the interactions between the mesoscale systems and topographic features, and is directly responsible for the rainfall.