Contributions of residential coal combustion to the air quality in Beijing–Tianjin–Hebei (BTH), China: a case study
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Published:2018-07-26
Issue:14
Volume:18
Page:10675-10691
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ISSN:1680-7324
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Container-title:Atmospheric Chemistry and Physics
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language:en
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Short-container-title:Atmos. Chem. Phys.
Author:
Li Xia,Wu Jiarui,Elser Miriam,Feng Tian,Cao Junji,El-Haddad Imad,Huang Rujin,Tie Xuexi,Prévôt André S. H.,Li Guohui
Abstract
Abstract. In the present study, the WRF-Chem model is used to assess
contributions of residential coal combustion (RCC) emissions to the air
quality in Beijing–Tianjin–Hebei (BTH) during a persistent air pollution
episode from 9 to 25 January 2014. In general, the predicted temporal
variations and spatial distributions of the mass concentrations of air
pollutants are in good agreement with observations at monitoring sites in
BTH. The WRF-Chem model also reasonably reproduces the temporal variations
in aerosol species when compared with the aerosol mass spectrometer measurements in Beijing. The
RCC emissions play an important role in the haze formation in BTH,
contributing about 23.1 % of PM2.5 (fine particulate matter) and
42.6 % of SO2 during the simulation period on average. Organic
aerosols dominate the PM2.5 from the RCC emissions in BTH, with a
contribution of 42.8 %, followed by sulfate (17.1 %). The air quality in
Beijing is remarkably improved when the RCC emissions in BTH and the
surrounding areas are excluded in model simulations, with a 30 % decrease
in PM2.5 mass concentrations. However, if only the RCC emissions in
Beijing are excluded, the local PM2.5 mass concentration is decreased by
18.0 % on average. Our results suggest that the implementation of the
residential coal replacement by clean energy sources in Beijing is
beneficial to the local air quality. Should residential coal replacement
be carried out in BTH and its surrounding areas, the air quality in Beijing
would be improved remarkably. Further studies would need to consider
uncertainties in the emission inventory and meteorological fields.
Funder
National Natural Science Foundation of China
Publisher
Copernicus GmbH
Subject
Atmospheric Science
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