塔克拉玛干沙漠腹地沙尘暴过程贴地层梯度输沙样粒度特征分析  

Characteristics of Grain Sizes for Samples of Different Grades of Transporting Sediment in the Ground Layer during the Course of Sandstorms in the Hinterland of the Taklimakan Desert

作　　者：孔丹[1,2] 何清[1] 张瑞军[1,2] 吴新萍[3] 黄杰[3] 郭建林[4] 

机构地区：[1]中国气象局乌鲁木齐沙漠气象研究所,乌鲁木齐830002 [2]新疆师范大学,乌鲁木齐830054 [3]且末县塔中气象观测站,且末841000 [4]库尔勒民航站,库尔勒841000

出　　处：《干旱区资源与环境》2009年第1期49-53,共5页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金(40775019);中国沙漠气象科学研究基金(SQJ2005001);中国气象局多轨道业务建设项目(QY20070201)资助

摘　　要：利用2007年4月22日塔克拉玛干沙漠腹地一次沙尘过程采集的贴地层梯度输沙样,应用Malvern MS2000激光粒度分析仪进行实验测量。结果显示:平均粒径在100μm附近分布,按梯度层阶越向上颗粒分选越好,粒度曲线呈单峰正偏,极细沙比重最大。对比两个采样点,位于沙丘顶部的B点比位于平坦沙地的A点粒度分布范围更广。The samples of transporting sediment in the ground layer in April 22,2007 in the hinterland of the Taklimakan Desert were analyzed.The results showed that the average particle size is distributed around 100μm.The dust sorted well with the increase in height.Particle size curve showed a biased single peak.And the largest proportion is the fine sand.Contrasts the two sampling spots,the distribution of the particle score on the top of the longitudinal dune is more abroad than that on the smooth sand.

关 键 词：沙尘暴 贴地层 粒度特征 

分 类 号：P425.55[天文地球—大气科学及气象学]