【摘 要】
：
利用WRF(Weather Research Forecast)中尺度模式对2006年6月5-7日福建地区出现的一次大暴雨过程进行了数值模拟,根据模式输出的物理量进行了诊断分析,并通过地形敏感性试验讨
【机 构】
：
南京信息工程大学,中国气象科学研究院,湖州市气象局,国家气象中心
论文部分内容阅读
利用WRF(Weather Research Forecast)中尺度模式对2006年6月5-7日福建地区出现的一次大暴雨过程进行了数值模拟,根据模式输出的物理量进行了诊断分析,并通过地形敏感性试验讨论福建地形对此次暴雨的影响.结果表明:中尺度WRF模式成功模拟出了这次暴雨的雨况及高低空流场分布.这是建立在静止锋、低空切变线和低空急流等系统基础上的一次典型的华南准静止锋降水.冷暖气流在底层交汇并产生强烈的垂直上升运动,不稳定能量的释放是暴雨发生和维持的机制之一,位温的垂直分布有利于低层涡度的发展.福建北部的喇叭口地形和武夷山迎风坡共同作用,导致西南气流的转向辐合,触发了中尺度切变线和中尺度涡旋的形成,加速了上升运动和中层对流发展,有利于位于迎风坡的建瓯、邵武、蒲城等地区降水的增强.
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