Trends in Air Pollutant Concentrations and the Impact of Meteorology in Shandong Province, Coastal China, during 2013-2019

Abstract

Emissions of air pollutants have been reduced in Shandong Province of China during 2013-2019. Meteorological conditions are an important factor affecting air pollutant concentrations, but few quantitative studies have been conducted on the effects of long-term and seasonal changes in meteorological on air quality. In this study, the trends in six criteria pollutants (including SO2, CO, PM10, PM2.5, NO2, and O3) from 2013 to 2019 in Shandong Province were analysed (PM2.5 and PM10: particulate matter with aerodynamic diameters less than 2.5 μm and 10 μm, respectively; O3: ozone). A Weather Research and Forecasting model coupled with Chemistry (WRF/Chem) was applied to evaluate the contributions of inter-annual and seasonal meteorological changes to the concentration reductions of six criteria pollutants. The results indicated that the concentrations of five criteria pollutants (exclude O3) decreased sharply before 2017, and then decreased slowly, while O3 concentration increased from 2013 to 2019. The

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