湖北十堰“05．8台风倒槽特大暴雨的多尺度分析

受“珊瑚”台风倒槽的影响，2005年8月14日晚至15日凌晨在十堰市的房县、竹山和丹江口部分地区出现了一次特大暴雨天气过程。利用常规气象资料、卫星云图资料、地面加密气象资料，对此次强降水过程进行了多尺度分析。结果表明：（1）副热带高压的阻挡、地面弱冷空气的扩散、中低纬度环流系统的相互作用及低空急流对水汽的输送，是影响此次强降水过程的主要大尺度环流背景；（2）暴雨发生前存在较为明显的中尺度露点锋和地面中尺度辐合线；（3）卫星云图上有组织的中尺度对流系统（MCS）的发生、发展、成熟与消散对强降水临近预报预警有着重要的指示作用。

Multi-scale Analysis of Typhoon Inverse Trough Heavy Rain in Shiyan in August of 2005

With the influence of the Coreal typhoon trough, a heavy rain weather process occurred in some areas of Shiyan, such as Fang county, Zhushan county, and Danjiangkou city, from the evening of august 14th to the dawn of the 15th in 2005. By the conventional observations, satellite images and ground intensive weather observations, the heavy precipitation process is analyzed on muhiple scales. The result shows that：（1） the irresistention of Subtropical High, the proliferation of ground weak cold air, the interaction of the low-latitude circulation systems and the water vapor transportation by the low level jet are the main large-scale circulation systems impacting this event; （2） the meso-scale dew point front and the ground convective line are obvious before the rainstorm occurred; （3） the organized occurrence, development, maturity and dissipation characteristics of the meso-scale convective systems （MCS） showed in satellite images play important roles in the heavy precipitation nowcasting and warning.