腾格里沙漠沙尘暴天气动力要素特征研究  

Variations of Dynamical Elements During a Sand-storm Passing the Tengger Desert Region

作　　者：吕萍[1] 董治宝[1] 张正偲[1] 赵爱国[1] 

机构地区：[1]中国科学院沙漠与沙漠化重点实验室,甘肃兰州730000

出　　处：《水土保持通报》2010年第3期104-106,共3页Bulletin of Soil and Water Conservation

基　　金：中国科学院“西部之光”人才培养计划“西部博士资助项目”草方格作用机理的实验与数值模拟(290828911);国家自然基金面上项目(40871003)

摘　　要：利用中国科学院风沙科学观测场的近地层观测资料,分析了腾格里沙漠地区沙尘暴天气过程地面摩阻速度、空气动力学粗糙度以及床面剪切力的变化特征。结果表明,在沙尘暴过境时,地面摩阻速度、空气动力学粗糙度以及床面剪切力并不是保持一成不变,而是随时间不断发生变化,各高度层风速之间相关系数大于0.9,具有很显著的相关性。Based on the data collected at the Sand Drift Observation Station of Chinese Academy of Sciences,the characteristics of friction velocity,aerodynamic roughness length,and shear stress during a sand-storm passing the Tengger Desert region were analyzed.Results show that the elements vary with time during the passage of the sand storm.The variation of wind speed is highly correlated with the height and the coefficient correlations are all bigger than 0.9.

关 键 词：腾格里沙漠 摩阻速度 粗糙度 

分 类 号：P445.4[天文地球—大气科学及气象学]