“…Fine particulate matter (PM 2.5 ) has severe impacts on public health ( Apte et al, 2018 ; Cohen et al, 2017 ; Yang et al, 2022 ; Zhang et al, 2017 ), produces economic losses ( Maji et al, 2018 ; Xie et al, 2016 , 2019 ), and enhances the spread of coronavirus disease (COVID-19) ( Ali et al, 2021 ; Borro et al, 2020 ; Rovetta and Castaldo, 2020 ) that has led most countries to set air quality standards for PM 2.5 ( Czy, 2019 ; Kim and Lee, 2018 ; Pitiranggon et al, 2021 ; Zhang et al, 2019 ). High concentration events (HCEs) of PM 2.5 occur consistently in South Korea, during the cold season, including January to March, especially in the Seoul-Metropolitan area (SMA; 33 cities comprising Seoul, Incheon, and Gyeonggi province).…”