论文标题
对1994年11月的Piedmont泛滥,以对流模型泛滥
Reforecasting the November 1994 flooding of Piedmont with a convection-permitting model
论文作者
论文摘要
意大利的皮埃蒙特地区受到1994年11月的大雨事件的影响。在第四个对流牢房中,涉及该地区的沿海山脉。在第5和第6点,有大量的降水,与高山区域的地形升力和低级融合有关。这项研究旨在评估对流渗透模型是否提供了有关过去数值实验的更有价值的信息。 11月4日的结果表明,云分辨率模型成功地重建了沿海山脉下游侧的降水系统结构。关于11月5日的降水量,找不到附加值。但是,我们提供了从热带和亚热带大西洋的潮湿空气反常运输的证据,并假设这种运输是如何导致降低撞击阿尔卑斯山上流动稳定性的。
The Piedmont region in Italy was affected by a heavy rainfall event in November 1994. On the 4th convective cells involved the coastal mountains of the region. On the 5th and early 6th, there were abundant precipitations, related to orographic lift and low-level convergences, in the Alpine area. This study aims to evaluate whether a convection-permitting model provides more valuable information with respect to past numerical experiments. Results for the 4th of November show that the cloud-resolving model successfully reconstructs the structure of precipitation systems on the downstream side of the coastal mountains. As regards the precipitations of the 5th of November, no added value is found. However, we provide evidence of the anomalously intense transport of moist air from the tropical and subtropical Atlantic and postulate how such transport is responsible for reducing the stability of the flow impinging on the Alps.