Multiphase chemistry experiment in Fogs and Aerosols in the North China Plain (McFAN): integrated analysis and intensive winter campaign 2018
Li Guo, Hang Su, Nan Ma, Jiangchuan Tao, Ye Kuang, Qiaoqiao Wang, Juan Hong, Yuxuan Zhang, Uwe Kühn, Shaobin Zhang, Xihao Pan, Nan Lü, Min Tang, Guangjie Zheng, Zhibin Wang, Yang Gao, Peng Cheng, Wanyun Xu, Guangsheng Zhou, Chunsheng Zhao, Bin Yuan, Min Shao, Aijun Ding, Qiang Zhang, Pingqing Fu, Yele Sun, Ulrich Pöschl, Yafang Cheng
Abstract
show higher mass fraction of secondary inorganic aerosols (SIA, mainly as nitrate, sulfate and ammonium) and secondary organic aerosols (SOA) during high humidity and fog episodes. The changes in aerosol composition further influence aerosol physical properties, e.g., with higher aerosol hygroscopicity parameter κ and single scattering albedo SSA under high humidity and fog cases. The campaign-averaged aerosol pH is 5.1 ± 0.9, of which the variation is mainly driven by the aerosol water content (AWC) concentrations. Overall, the McFAN experiment provides new evidence of the key role of multiphase reactions in regulating aerosol chemical composition and physical properties in polluted regions.