Articles | Volume 22, issue 17
Research article
02 Sep 2022
Research article |  | 02 Sep 2022

Chemical evolution of secondary organic aerosol tracers during high-PM2.5 episodes at a suburban site in Hong Kong over 4 months of continuous measurement

Qiongqiong Wang, Shan Wang, Yuk Ying Cheng, Hanzhe Chen, Zijing Zhang, Jinjian Li, Dasa Gu, Zhe Wang, and Jian Zhen Yu

Data sets

PM2.5 major components and select tracers during eleven pollution episodes (30 Aug.-31 Dec. 2020) at the HKUST Air Quality Research Supersite, Hong Kong J. Z. Yu, Q. Q. Wang, and S. Wang

Short summary
Secondary organic aerosol (SOA) is often enhanced during fine-particulate-matter (PM2.5) episodes. We examined bi-hourly measurements of SOA molecular tracers in suburban Hong Kong during 11 city-wide PM2.5 episodes. The tracers showed regional characteristics for both anthropogenic and biogenic SOA as well as biomass-burning-derived SOA. Multiple tracers of the same precursor revealed the dominance of low-NOx formation pathways for isoprene SOA and less-aged monoterpene SOA during winter.
Final-revised paper