为明确临清市沙尘天气特征及沙尘天气随时间的变化规律，我们对1961～2010年临清市沙尘天气的观测资料进行了统计分析。结果表明：20世纪60—80年代临清市年沙尘天数呈逐渐减少趋势，变化较明显；90年代较80年代略有上升趋势；2001～2010年沙尘天数变化较明显，为各年代最低值，年平均沙尘天数仅3．9d；沙尘天数总体上呈现下降的趋势。临清市沙尘暴天气只发生在春、夏、冬3个季节，且主要发生在春季，占全年沙尘暴天气总数的59％；秋季无沙尘暴；沙尘暴的月变化明显，其中4月的沙尘暴发生次数为全年最高，约占全年沙尘暴天气总数的31％。临清市沙尘天气以扬沙天气为主，占总沙尘天数的73％；其次是浮尘天气，约占18％；再次为沙尘暴天气，约占9％。%To identify characteristics and changes of dust weathers, observation documents from 1961 to 2010 in Linqing were analyzed. The results showed the number of dust day reduced obviously from the 1960s to the 1980s, increased slightly From the 1980s to the 1990s. From 2001 to 2010, the number of dust day varied apparently, but showed the lowest annual average of 3.9 d. On the whole, dust day was in a downward trend. In Linqing, sandstorm occured only in spring, summer and winter, but mainly in spring, when 59% of the total number of sandstorm occurred. Sandstorm freequency changed remarkably from month to month, in .April there was the highest sandstorm frequency, accounting to 31% of annual total number. Dust weather in Linqing appeared mainly as blowing dust （73%）, and the rest were floating dust （18%） and sandstorm （9%） .
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