大气污染物浓度变化特征及潜在源分析——以乌鲁木齐为例

doi:10.13866/j.azr.2021.02.28

Abstract

Abstract:

Meteorological parameters and pollutant concentrations in Urumqi, China, in 2017 were used to study the concentration characteristics of atmospheric pollutants and the influence of meteorological factors on pollutants. Trajectory cluster analysis, potential source contribution function analysis, and the concentration weighted trajectory method were used to assess the transport pathways and potential sources of PM_2.5. The findings revealed that the most serious pollution was from PM₁₀ and PM_2.5. During periods of heating, the concentrations of atmospheric pollutants, apart from O₃, were higher than those during periods where there was no heating. The heavy pollution of atmospheric particles (PM_2.5 and PM₁₀) during heating periods was ascribed primarily to low temperature, low wind speed, high relative humidity, special topographies, and temperature inversion. PM_2.5 in Urumqi was transported mostly from the northwest, the short distance pathways of Nileke Town, Shawan Town, Hutubi Town, and Fukang City had greater influence on Urumqi during heating period. The main potential sources of PM_2.5 were determined as being Fukang City, Hejing Town, Shawan Town, Changji City, Shawan Town, Jimusaer Town, and Manasi Town. External transport and native sources of pollution also had a great impact on the level of PM_2.5 in Urumqi.

Key words: atmospheric pollutants, concentration characteristics, backward trajectory, transport pathway, potential source

LIU Zilong,DAI Bin,CUI Zhuoyan,LIU Yonggao,XU Zhu,ZHENG Xinjun. Concentration characteristics and potential source of atmospheric pollutants: A case study in Urumqi[J].Arid Zone Research, 2021, 38(2): 562-569.

Figures/Tables 5

References 28

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Concentration characteristics and potential source of atmospheric pollutants: A case study in Urumqi

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