塔克拉玛干沙漠及其大气降尘点粒度特征分析  

Characteristic of Grain Sizes Atmospheric Dust and Sand in Taklimakan Desert

作　　者：霍文[1,2] 何清 刘新春[1,2] 秦贺[3] 邢江燕 

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]塔克拉玛干沙漠大气环境观测试验站,新疆塔中841000 [3]新疆气象台,新疆乌鲁木齐830002 [4]尉犁县铁干里克气象站,新疆巴州841000

出　　处：《水土保持研究》2009年第4期207-211,215,共6页Research of Soil and Water Conservation

基　　金：国家自然基金项目(40775019);新疆自治区科技攻关项目(200833119);中国气象局新技术推广项目(CMATG2007M27);中央级公益性科研院所基本科研业务费专项资金项目(IDM2006002,IDM200807,IDM200806,IDM200809);国家“十一五”科技支撑计划项目(2008BAC40B05-01);干旱气象科学研究基金项目(IAM200814);新疆气象局项目(200723)

摘　　要：对塔克拉玛干沙漠及其大气降尘点的粒度参数进行了分析计算,结果表明：风沙天气过程中,塔中沙漠地区平均粒径Ф值较小,标准偏差较小;肖塘沙漠过渡带平均粒径Ф值较大,标准偏差较大。肖塘沙漠过渡带粒度曲线分布形态左偏;塔中沙漠地区曲线分布形态右偏。肖塘沙漠过渡带的峰度值较大,塔中沙漠地区较小。塔里木盆地及其周边地区平均粒径Ф值为2-6,为细沙、极细、粗粉沙、中粉沙或者是其混合体。Analysis on the grain sizes of atmospheric dust and sands in the Taklimakan Desert.The results showsed that Ф values and standard deviation in sandy and dust weather inTazhong was lower.However,those of Xiaotang transition zone was higher.The distribution shape of Xiaotang transition zone was left deviated,and that of Tazhong was right deviated.The kurtosis of Xiaotang transition zone was higher than that of Tazhong desert area.The mean grainsize（Ф value） of Tarim basin and its surrounding area is 2～6, consisting of fine silt, very fine silt, coarse silt, medium silt and their mixture.

关 键 词：塔里木盆地 大气降尘 平均粒径 标准偏差 偏度 峰度 

分 类 号：P425.55[天文地球—大气科学及气象学]