基于HYSPLIT4模式的天水市颗粒物输送路径

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Abstract Backward trajectories from urban Tianshui was simulated using the HYSPLIT4model for winters of 2017~2019. The influence of heights, i.e. 50, 200, 500 and 1000m, and the number of clusters at 500m on the statistical results of transport pathway clustering was analyzed. The 500m backward trajectories in spring, summer, autumn and winter were clustered, and the weighted potential source contribution analysis (WPSCF) was used to explore the potential source areas of fine particles. The results indicate that the clustered pathways starting at 500m was the most representative for the study area. The number of clusters selected based on the principle of significant increase of TSV is small and could reflect the trajectory transport characteristics in different directions. In winter, the southeast path from the south of Shaanxi Province had the highest PM_2.5 concentration, reaching 78.2 μg/m³. In spring, the highest particulate concentration is found in the northwest path, and the average concentrations of PM₁₀ and PM_2.5 were 127.9~129.9 μg/m³ and 40.6~41.0 μg/m³, respectively. There was no significant difference between the particulate concentrations in different paths in summer and autumn.

Key words： HYSPLIT4 model backward trajectory clustering principle potential source contribution analysis

Received: 30 December 2020

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X513

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	LIU Hao
	WANG Ying
	WANG Si-tong
	LIU Yang
	LI Bo

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LIU Hao,WANG Ying,WANG Si-tong等. Study on the transport path of particles in Tianshui City based on HYSPLIT4 model[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(8): 3529-3538.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I8/3529

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