The 90 full recorded statistical datum that come from weather observation station shows that the frequency of duststorm weather takes on the downtrend in Xinjiang over the 40 years .

• 通过90个记载完整的气象观测站资料；统计表明；近四十年来新疆沙尘暴天气频率呈下降趋势；和全国沙尘暴天气年日均数减少趋势基本一致；两者通过0.；01的显著性水平检验；相关系数为0