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根据对 2 0 0 0年 4月 4日至 6日的 50 0hPa和中低层流场以及地面天气形势的研究 ,分析了北京“4·6”沙尘暴天气产生的原因 ,指出这次沙尘暴天气与下坡风效应和北京的自然地理环境有关。
Based on the study of 500hPa, middle and lower laminar flow fields and the terrestrial weather conditions from April 4 to April 4, 2000, the causes of the “4.6” sandstorm in Beijing are analyzed. It is pointed out that the sandstorm weather and the next Slope wind effect and Beijing’s natural geographical environment.