两次典型强沙尘暴过程的对比分析

Comparative Analysis of Two Typical Severe Sandstorm Events

利用常规气象资料 ,应用天气分析及诊断分析方法 ,对 2 0 0 1年 4月 8～ 9日和2 0 0 2年 3月 1 9～ 2 1日的两次强沙尘暴天气过程 ,从天气气候背景、单站地面气象要素、环流形势、冷空气的强度及影响路径、沙尘暴的起沙源地、影响时间和范围等进行深入分析。结果表明 :两次强沙尘暴过程的沙尘暴源地基本相同 ,但由于环流形势、冷空气的强度、影响时间、蒙古气旋的位置及前期气候背景有所差异 ,因此对宁夏造成了不同的影响。

Based on normal meteorological observations, synoptic and diagnostic analysis of two typical severe sandstorm processes on March 19～21st 2002 and April 8～9th 2001 is made. The results show that the circulation patterns and sand source terrain of the two processes are nearly similar,but, their intensity,duration of cold wave and the position of Mongolian cyclone,as well as early climatic background are different.