Pollution Characteristics, Transport Pathways, and Potential Source Regions of PM 2.5 and PM 10 in Changchun City in 2018

Fanhao Meng, Ju Wang, Tongnan Li and Chunsheng Fang
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Fanhao Meng: College of New Energy and Environment, Jilin University, Changchun 130012, China
Ju Wang: College of New Energy and Environment, Jilin University, Changchun 130012, China
Tongnan Li: College of New Energy and Environment, Jilin University, Changchun 130012, China
Chunsheng Fang: College of New Energy and Environment, Jilin University, Changchun 130012, China

IJERPH, 2020, vol. 17, issue 18, 1-19

Abstract: Air pollution has attracted increasing attention in recent years. Cluster analysis, scene analysis, and the potential source contribution function (PSCF), based on the backward trajectory model, were used to identify the transport pathways and potential source regions of PM 2.5 and PM 10 (particulate matter with an aerodynamic diameter of not more than 2.5 µm and 10 µm) in Changchun in 2018. In addition, the PSCF was slightly improved. The highest average monthly concentrations of PM 2.5 and PM 10 appeared in March and April, when they reached 53.9μg/m 3 and 120.0 μg/m 3 , respectively. The main potential source regions of PM 2.5 and PM 10 were generally similar: western Jilin Province, northwestern Inner Mongolia, northeastern Liaoning Province, and the Yellow Sea region. The secondary potential source regions were southern Russia, central Mongolia, western Shandong Province, eastern Hebei Province, and eastern Jiangsu Province. The northwest and southwest directions were found to be the two pathways that mainly affect the air quality of Changchun City. Moreover, the northwestern pathway had a larger potential contribution source area than the southwestern pathway. The airflow in the southwest direction came from Liaoning Province, Shandong Province, and the Yellow Sea region. This mainly occurred in summer; its transmission distance was short; it had a relatively higher weight potential source contribution function (WPSCF) value; it can be regarded as a local source; and its representative pollutants were SO 2 (sulfur dioxide), CO (carbon monoxide), and O 3 (ozone). The northwestern pathway passed through Russia, Mongolia, and Inner Mongolia. The transmission distance of this pathway was longer; it had a relatively lower WPSCF value; it can be considered as a natural source to a certain extent; it mainly occurred in autumn and, especially, in winter; and the representative pollutants of this pathway were NO (nitric oxide), NOx (nitrogen oxide), PM 2.5 , and PM 10 .

Keywords: transport pathway; backward trajectory; cluster analysis; scene analysis; potential source contribution function (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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