2003年10月河北省沧州秋季暴雨成因分析

通过对2003年10月10日夜间发生在沧州的秋季大暴雨过程的影响系统、触发机制、稳定度以及涡度、散度、垂直速度等物理量的分析，发现此次暴雨过程前后大气层结一直稳定，属于稳定型降水；能量积聚小于夏季，但是高低空急流较强，所配合物理量不小于夏季，暴雨出现在低层辐合高层辐散的强垂直运动上升区，表明急流为暴雨提供了很好的水汽及动力条件。

Analysis of Autumn Rainfall Event of Cangzhou, Hebei Province in 2003

Analysis of a heavy rainfall event at Cangzhou, Hebei Province 11-12 October 2003 is made from some aspects such as influence systems, triggering mechanism, stability and physical quantity fields, etc. It shows that the event belongs to stable rainfall, its energy accumulation is smaller than that in summer, but the jets are stronger with the high value center of the mid-low level convergence and the upper-level divergence and playing an important role in the formation of the event, providing vapor and motive terms, and the heavy rain region appears with the high value center of upshift velocity.