诱发山洪泥石流特强暴雨的特征

The Features of Severe Rainstorm Inducing Mountain Torrents and Mud-rock Flows

以80年代以来发生在辽东半岛山区诱发较强的山洪泥石流的特强暴雨为主要研究对象，从大中小尺度、高中低纬度、高中低空天气系统的配置和相互作用以及环境条件和物理机制等方面探讨其成因。发现特强暴雨在热力条件方面与一般暴雨的差异不甚明显，都必须在低空暖湿空气输送和辐合而造成深厚的准饱和的大气层，其差异主要表现为特强暴雨低层的强辐合和高层强辐散叠加而引起强烈垂直上升运动的动力条件。

The main studying objects were the severe rainstorms which had happened since 1980's and aroused grave mountain torrents and mud-rock flows in the mountainous area in Liaodong peninsula. The formation reasons of severe rainstorms were inquired in suitable disposition and interaction,environmental conditions and physical mechanism for weather systems of large, middle and small scales,at high,middle and low latitudes and altitudes. It was shown that there is no obvious difference in thermal condition between the severe and normal rainstorms,and both need quasisaturated atmospheric layer resulted from the transportation and convergence of low altitude warm and moist air. The most remarkable feature is the dynamic condition of the violent vertical upward motion caused by the superposition of the violent convergence in the low level and the divergence in the upper air.