“2+26”城市大气重污染下PM<sub>2.5</sub>来源解析

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Abstract

The Regional Atmospheric Environment Modeling System (RegAEMS) was used to simulate a severe PM_2.5 pollution event from December 26, 2017 to January 2, 2018 at "2+26 cities" in the Beijing-Tianjin-Hebei region and its surrounding areas. Based on RegAEMS, a module named Air Pollution Source Apportionment (APSA) for pollutant source apportionment was developed to analyse the regional and industrial sources of PM_2.5 in "2+26" cities. This pollution event was characterized by long duration, broad influence and serious pollution, with the hourly maximum PM_2.5 concentration reaching 201~507μg/m³. The results showed that RegAEMS could well simulate the temporal and spatial distributions of PM_2.5 during this period of heavy pollution. The regional source contribution showed that the peripheral areas generally had a greater impact on the border cities, contributing around 15.3% to 57.5%, and had a less impact on the central cities with the contribution lingering around 0.3% to 8.4%. The source contributions of PM_2.5 were greatly affected by near-surface wind field, and showed obvious regional transmission characteristics. Residential, industrial and transportation sources contributed significantly in these 28 cities, with contribution percentages ranging from 26.6% to 45.8%, 16.4% to 37.8% and 13.0% to 35.9%, respectively. This study showed that RegAEMS could be used to perform the analysis of the regional and industrial sources of fine particulate matters in cities and had great application potentials in the scientific management and control of atmospheric pollution.

Key words： source apportionment fine particulate matter Beijing-Tianjin-Hebei region and its surrounding areas

Received: 10 May 2019

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X513

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	Articles by authors
	WANG De-yi
	WANG Ti-jian
	HAN Jun-cai
	XIE Xiao-dong
	CHEN Chu
	CAO Yun-qing
	SHU Lei

Cite this article:

WANG De-yi,WANG Ti-jian,HAN Jun-cai等. Source apportionment of PM_2.5 under heavy air pollution conditions in “2+26” cities[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(1): 92-99.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I1/92

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