Potential spatiotemporal variability of dust from the playa of the dry lake bed of the Aral Sea in Central Asia
TUHETI·Abula1, ABUDUWAILI·Jilili2,3,4, GE Yong-xiao2,3,4, WANG wei2,3,4, DU fei1
1. Key Laboratory of Smart City and Environment Modelling Institute, School of Resources and Environmental Sciences, Xinjiang University, Urumqi 830046, China; 2. State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; 3. Research Center for Ecology and Environment of Central Asia, Chinese Academy of Sciences, Urumqi 830011, China; 4. College of Resources and Enviromment, University of Chinese Academy of Sciences, Beijing 100049, China
Abstract：In order to illustrate potential spatiotemporal variability of dust from playa of the Aral Sea, the HYSPLIT model with reanalysis meteorological data from 1969 to 2018 was used to compute the 7-day forward trajectories of the air parcel from the Aral Sea. Air parcel trajectory density plots were also mapped for five levels (0~0.5, 0.5~1, 1~1.5, 1.5~2, 2~5km.agl) with the kernel density method. The results showed that potential dust transport pathways had a conspicuous seasonal differentiation. The spring and winter gained the largest potential diffusion range at each height, in which dust from playa of the Aral Sea transported along the northeast accounted for 61% and 35%, respectively, and could reach as far as east Asia. The potential transportation of dust in autumn was weaker than that in spring and winter. Dust diffusion in summer had apparent height divergence around 0.5km. All air parcel trajectories showed densities of dust decreased with the increase of height in each season. In spring and summer, the potential transport of the air trajectory showed a tendency to move northeast and southwest, but move northeast in winter. Under favorable weather conditions, dust generated from the Aral Sea might affect regions downwind thousands of kilometers. Accordingly, the dust from the playa of the Aral Sea might influence Uzbekistan and other countries in the surrounding region. It would remarkably accelerate the melting of snow and ice on the Tianshan Mountains if deposited in the region.
阿布拉·吐合提, 吉力力·阿不都外力, 葛拥晓, 王伟, 杜菲. 中亚咸海干涸湖床粉尘潜在扩散的时空变异分析[J]. 中国环境科学, 2020, 40(9): 3756-3766.
TUHETI·Abula, ABUDUWAILI·Jilili, GE Yong-xiao, WANG wei, DU fei. Potential spatiotemporal variability of dust from the playa of the dry lake bed of the Aral Sea in Central Asia. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(9): 3756-3766.
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