Atmospheric chemistry and physics • Vol 21 • No 22
Air quality deterioration episode associated with a typhoon over the complex topographic environment in central Taiwan
November 2021 • Chuan‐Yao Lin, Yang‐Fan Sheng, Wan‐Chin Chen, Charles C.‐K. Chou, Yi-Yun Chien, Wen‐Mei Chen
Abstract. Air pollution is typically at its lowest in Taiwan during summer. The mean concentrations of PM10, PM2.5, and daytime ozone (08:00–17:00 LST) during summer (June–August) over central Taiwan were 35–40 µg m−3, 18–22 µg m−3, and 30–42 ppb, respectively, between 2004 and 2019. Sampling analysis revealed that the contribution of organic carbon (OC) to PM2.5 could have exceeded 30 % in urban and inland mountain sites during July in 2017 and 2018. Frequent episodes of air quality deterioration occur over the w…