Jiayin Sun, Xiaoyu Yu, Zhenhao Ling, Guizhen Fang, Lili Ming, Jun Zhao, Shichun Zou, Huatian Guan, Haichao Wang, Xuemei Wang, Zhe Wang, Yuan Gao, Yee Jun Tham, Hai Guo, Yanli Zhang
Understanding of the photochemical ozone (O3 ) pollution over the Pearl River Estuary (PRE) of southern China remains limited. We performed an in-depth analysis of volatile organic compounds (VOCs) data collected on an island (i.e., the Da Wan Shan Island, DWS) located at the downwind of Pearl River Delta (PRD) from 26 November to 15 December 2021. Abundances of O3 and its precursors were measured when the air masses originated from the inland PRD. We observed that the VOCs levels at the DWS site were lower, while the mixing ratio of O3 was higher, compared to those reported at inland PRD, indicating the occurrence of photochemical consumption of VOCs during the air masses transport, which was further confirmed by the composition and diurnal variations of VOCs, as well as ratios of specific VOCs...
April 9, 2024: Science of the Total Environment