大气科学学报2025，Vol.48Issue(5)：752-762,11.DOI:10.13878/j.cnki.dqkxxb.20241021001
塔克拉玛干沙漠人工绿地与自然沙地沙尘水平通量及粒度差异研究
Comparative analysis of sand-dust horizontal flux and grain size charac-teristics between artificial green land and natural sandy land in the Takli-makan Desert
摘要
Abstract
The Taklimakan Desert,one of China's major dust source regions,exerts significant regional and global environmental influence through its dust emission and transport processes.Understanding how different sur-face types-artificial green land and natural sandy land-affect dust dynamics is crucial for improving dust process modeling and optimizing wind and sand control strategies.This study compares dust transport characteris-tics between artificial green land(Tazhong)and natural sandy land(Xiaotang)in the Taklimakan Desert.Using Big Spring Number Eight(BSNE)gradient samplers,dust samples were collected from April 1 to July 10,2024.Horizontal dust flux and grain size distribution were systematically analyzed.The main findings are as follows:1)There was substantial spatial heterogeneity in horizontal dust flux,with Xiaotang(65.3 kg·m-2·h-1)ex-hibiting approximately 2.2 times the flux of Tazhong(29.7 kg·m-2·h-1),indicating stronger dust emission potential in natural sandy environments.The vertical distribution pattern at Tazhong displayed a nonlinear"de-crease-increase-decrease"profile with turning points at 8 m and 63 m,deviating from the typical power-law form.In contrast,Xiaotang's flux decreased with height,following a power-law distribution.2)Dust composition was dominated by very fine sand(48.8％)and silt(40.6％),accounting for 89.4％of total particles.Both sites showed increasing silt content and finer particle sizes with height.However,Tazhong exhibited overall coarser par-ticles,better sorting,and narrower kurtosis compared to Xiaotong.3)Gravity-driven deposition of local materials was concentrated within the lower atmospheric layer(＜10 m)at both sites.Differences in land surface type and dust source primarily accounted for variations in horizontal flux and particle size distribution.Wind speed,wind direction,and vegetation conditions were key drivers of temporal variation in dust flux,which increased with wind intensity. Future research should aim to further quantitatively assess the relative contribution of wind speed,direction,and vegetation coverage to the vertical differentiation of dust flux and particle size.Additionally,more precise source attribution and long-term fixed-site observations under extreme weather conditions-such as sandstorms-are needed to deepen understanding of surface-atmospheric interactions.These efforts will enhance the scientific basis for wind and sand control measures and help evaluate the ecological benefits of engineering interventions in the Taklamakan Desert.关键词
塔克拉玛干沙漠/人工绿地/自然沙地/沙尘水平通量/粒度特征Key words
Taklimakan Desert/artificial green land/natural sandy land/horizontal dust flux/grain size character-istics引用本文复制引用
马明杰,霍文,杨帆,杨兴华,周成龙,买买提艾力·买买提依明,马依拜尔·麦哈木提,王逸飞..塔克拉玛干沙漠人工绿地与自然沙地沙尘水平通量及粒度差异研究[J].大气科学学报,2025,48(5):752-762,11.基金项目
新疆青年拔尖人才项目-青年科技创新人才(2023-第二批次)(2023TSYCCX0075) （2023-第二批次）
中国气象局青年创新团队项目(CMA2024QN13) （CMA2024QN13）
新疆科技创新团队(天山创新团队)项目(2022TSYCTD0007) （天山创新团队）
