Impact of different emission sources on PM2.5 over East China based on numerical study
HU Ya-nan1, MA Xiao-yan1, SHA Tong1, GAO Song2
1. Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Joint International Research Laboratory of Climate and Environment Change, Key Laboratory of Meteorological Disaster Ministry of Education, Nanjing University of Information Science and Technology, Nanjing 210044, China; 2. Electric Power Research Institute of Jiangsu Electric Power Company, Nanjing 210044, China
Abstract：The meso-scale meteorology-chemistry coupled model WRF-Chem was used to simulate the contribution of different emission sources in MEIC inventory (industry, power, residential, transportation and agricultural) to PM2.5 over east China. The conclusions are as follows:Industry contributed about 40%~60% PM2.5 in spring, summer and autumn, while residential contributes the largest in winter due to the use of scattered coal for heating, with over 50% in the areas such as Shandong, Anhui and Jiangsu province. The contributions from agriculture, power and transportation to PM2.5 have minor seasonal differences, in which about 20%~30% from agriculture, about 10% from transportation and power plant. It may indicate that we should mainly regulate residential source in winter, and limit the emission of industry and agriculture in other seasons. The contribution of primary PM2.5 from coal-based industry, residential and power plant are about 50%~60%, and the contribution of NO3- and NH4+ from transportation and agriculture could be up to 53% and 93%, respectively. The contribution of SO42- from industry and power plant is only about 5%~15% which is possibly underestimated due to under-predicted sulfate by the model. The contribution of OC from residential, BC from transportation and Na+ and Cl- from all major sources to the total PM2.5 is about 30%, 15%, and less than 3%, respectively.
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HU Ya-nan, MA Xiao-yan, SHA Tong, GAO Song. Impact of different emission sources on PM2.5 over East China based on numerical study. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(5): 1616-1628.
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