2002年3月18～22日强沙尘暴过程分析

Synoptic Analysis of Severe Dust Storm on March 18—22,2002

分析了 2 0 0 2年 3月 1 8～ 2 2日发生在我国北方地区的近几年来范围最大、持续时间最长且影响最大的一次强沙尘暴过程。主要进行了气候背景、天气形势和物理量诊断分析。分析表明这次强沙尘暴天气过程是在前期干旱少雨的气候背景下受强冷空气和蒙古气旋影响造成的。沙尘天气的产生原因包括 :上游沙尘高空输送沉降、本地热力作用、蒙古气旋和锋面附近大风。

On March 18—22, 2002, a severe dust storm raided North China. The stricken area and the duration of the event are the maximum in recent years. The climate characteristics and the synoptic situation of the event are diagnosed. Some physical diagnostics are analyzed, too. The results show that strong cold air and the Mongolia cyclone are the main causes for the generation and development of the event.