中文摘要：

利用1971-2O10年柴达木盆地8个气象站观测资料,采用气候统计诊断分析方法,对柴达木盆地平均风速和大风日数的变化趋势及突变特点进行研究。结果表明：近40a柴达木盆地平均风速、大风日数的年、季、年代际变化均呈下降趋势。年平均风速下降幅度为-0.28m·s^-1/10a（P〈0.01）,四季平均风速减小幅度表现为夏季〉春季〉秋季〉冬季的气候特征;年平均大风日数减少幅度为-5.8d/10a（P〈0.05）,以夏季减幅最明显,秋、冬季减幅最小;大风天气最多的季节是春季,占年大风日数的44.2%,春季大风日数最多且风速较大,秋季大风日数最少且风速较小,主要与大气环流系统的活动有关;年、季平均风速的异常年份出现在20世纪70年代,这与20世纪70年代荒漠化程度比较严重有一定的关系;气温、降水量与大风日数呈明显的负相关,这在很大程度上解释了大风呈减少趋势的原因,而降水的显著增加是主要原因之一。

英文摘要：

Observation data from 8 weather stations from 1971-2010 in the western Chaidamu Basin were applied in the study.By climate statistical diagnosis method,the climate change trend and mutation of average wind speed and strong wind days were studied.Results indicate that the annual,seasonal and decadal changes of average wind speed and wind days in the study area were declining in the latest 40 years.The falling range of nual average wind speed was -0.28m ·s^-1/10a（P 〈0.01） ,and summer 〉 spring 〉 autumn 〉 winter. Av- erage annual strong wind days reduced by -5.8d/10a（ P 〈 0.05）, with the maximum reduction in summer and smallest in autumn and winter; the maximum number of strong winds appeared in spring,accounting for 44.2%of annual strong wind days.While in autumn strong wind days were the minimum and the wind speed was lower,and these were related to the atmospheric circulation.Abnormal annual and seasonal mean wind speeds were appeared in the 1970s,which related to the severe desertification at that time.The relationship between temperature,precipitation and wind days was negative,and to a great extent,this explained the reason why the wind days was decreased,and the obvious increase of precipitation was the main reason.