The Regional Atmospheric Environment Modeling System (RegAEMS) was used to simulate a severe PM2.5 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 PM2.5 in "2+26" cities. This pollution event was characterized by long duration, broad influence and serious pollution, with the hourly maximum PM2.5 concentration reaching 201~507μg/m3. The results showed that RegAEMS could well simulate the temporal and spatial distributions of PM2.5 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 PM2.5 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.
王德羿, 王体健, 韩军彩, 谢晓栋, 陈楚, 曹云擎, 束蕾. “2+26”城市大气重污染下PM2.5来源解析[J]. 中国环境科学, 2020, 40(1): 92-99.
WANG De-yi, WANG Ti-jian, HAN Jun-cai, XIE Xiao-dong, CHEN Chu, CAO Yun-qing, SHU Lei. Source apportionment of PM2.5 under heavy air pollution conditions in “2+26” cities. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(1): 92-99.
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