塔克拉玛干沙漠粉尘释放通量研究  

Dust Emission Flux in Taklimakan Desert

作　　者：张晨亮[1] 陶淘[2] 周成龙[3] 蒋聚金 ZHANG Chenliang;TAO Tao;ZHOU Chenglong;JIANG Jujin(Xinjiang Meteorological Technology and Equipment Support Center,Urumqi 830002,China;Xinjiang Meteorological Information Center,Urumqi 830002,China;Institute of Desert Meteorology,China Meteorological Administration,Urumqi 830002,China;Weather Modification Office of Korla,Korla 841000,China)

机构地区：[1]新疆气象技术装备保障中心,新疆乌鲁木齐830002 [2]新疆气象信息中心,新疆乌鲁木齐830002 [3]中国气象局乌鲁木齐沙漠气象研究所,新疆乌鲁木齐830002 [4]库尔勒市人工影响天气办公室,新疆库尔勒841000

出　　处：《沙漠与绿洲气象》2024年第3期143-149,共7页Desert and Oasis Meteorology

基　　金：自治区科技计划面上项目2022年第二批(2022D01A366)。

摘　　要：土壤风蚀产生的粉尘颗粒物严重影响空气环境质量,为了探明粉尘释放规律,有必要研究不同高度层风速和摩阻风速对粉尘释放通量的影响机制。通过分析塔克拉玛干沙漠观测站不同高度层风速和平均摩阻风速,利用DPM模型计算粉尘释放通量,综合分析摩阻风速与粉尘释放通量的相互关系。结果表明:(1)不同观测日不同高度层的风速变化各不相同,2 m高度层风速的变化范围是0.05~7.73 m/s,4 m高度层风速的变化范围是0.09~7.19 m/s,10 m高度层风速的变化范围是0.5~8.09 m/s。(2)4月1-30日各个观测日24 h内平均摩阻风速分别为0.42、0.34、0.27、0.34、0.16、0.32 m/s,变化范围为0.16~0.42 m/s。(3)DPM模型研究发现实测跃移通量约为模拟值的129%,模拟值与实测值相关性较好,R2为0.91。Dust particles generated by soil wind erosion have seriously affected the air environment quality.To explore the dust emission law,it is necessary to study the mutual mechanism of wind speed and friction wind speed at different heights on dust emission flux.In the case of only observed data,it was necessary to study the dust release caused by soil wind erosion by simulation.In this paper,the variation of wind speed at different altitudes in Taklimakan Desert and the average friction wind speed were analyzed,and the dust release flux was calculated by DPM model.The relationship between the average friction wind speed and the dust release flux was comprehensively analyzed.The results showed that:(1)The variation of wind speed at different altitudes was different in different observation days.The variation range of wind speed at 2 m height was 0.05-7.73 m·s^(-1),the variation range of wind speed at 4 m height was 0.09-7.19 m·s^(-1),and the variation range of wind speed at 10 m height was 0.5-8.09 m·s^(-1).(2)From April 1st to April 30th,the average friction wind speed within 24 hours of each observation day was 0.42,0.34,0.27,0.34,0.16 and 0.32 m·s^(-1),respectively,and its variation range was 0.16-0.42 m·s^(-1);(3)The measured jump flux was about 129%of the simulated value,and the correlation between the simulated value and the measured value was good,with the quadratic coefficient of 0.91.

关 键 词：DPM模型 土壤风蚀 塔克拉玛干沙漠 摩阻风速 

分 类 号：X169[环境科学与工程—环境科学]