Fine-particle pollution associated with haze threatens the health of more than 1 billion people in China. Extremely high PM2.5 concentrations are frequently observed especially during the winter haze event in northern China. Even after accounting for aerosol-radiation-meteorology feedback and improving the emission inventory, state-of-the-art models still fail to capture the observed high PM2.5 concentrations, suggesting the missing of key chemistry for the secondary aerosol formation. To improve the prediction and control strategy of PM2.5, we are in urgent need of a better understanding of the chemistry of secondary aerosol formation. Thus we propose the session "Multiphase chemistry of secondary aerosol formation under severe haze" to promote the research and discussion on this topic which is highly relevant for both atmospheric chemists and the public.

The session is open for all submissions which addresses, but is not limited to, the following questions concerning secondary aerosol formation: What are the key oxidation pathways leading to aerosol formation under clean and polluted conditions? What is the role of multiphase chemistry versus gas phase chemistry? Are laboratory determined kinetic data of multiphase chemistry directly applicable for ambient conditions and if not, how to derive and determine the reaction kinetics relevant for ambient conditions? What is the aerosol particles’ and droplets’ pH and how does it influence the multiphase chemistry? What is the role of the RH, temperature, mixing state and aerosol phase state in multiphase chemistry and how does aerosol mixing state play a role? What's the contribution of aqueous secondary organic aerosol (SOA) formation under highly polluted conditions?

A special issue of the same topic has already been approved and launched in the EGU journal "Atmospheric Chemistry and Physics".

Convener: Hang Su | Co-conveners: Yafang Cheng, Jingkun Jiang, Jian Wang
| Mon, 08 Apr, 10:45–12:30, 14:00–15:45
Room 0.11
| Attendance Mon, 08 Apr, 16:15–18:00
Hall X5

Attendance time: Monday, 8 April 2019, 16:15–18:00 | Hall X5

Chairperson: Hang Su, Yafang Cheng
X5.367 |
Biotoxicity of water-soluble species in PM2.5 using Chlorella
Fengkui Duan, Liu Yang, Hua Tian, Kebin He, Yongliang Ma, Tao Ma, Lidan Zhu, Hui Li, and Shuo Yang
X5.368 |
Shengzhen Zhou, Xuemei Wang, Luolin Wu, Jinpu Zhang, Weihua Chen, Junchen Guo, and Jun Zhao
X5.369 |
Siyang Li, Xiaotong Jiang, Christian George, Ling Liu, Wei Jiang, Qingzhu Zhang, Wenxing Wang, Maofa Ge, and Lin Du
X5.370 |
Study on consistency and applicability of parameterization schemes for the size-resolved aerosol activation ratio based on field measurements
(withdrawn after no-show)
Jiangchuan Tao, Chunsheng Zhao, Nan Ma, and Ye Kuang
X5.371 |
Juan Hong, HanBing Xu, HaoBo Tan, Changqing Yin, Liqing Hao, Fei Li, Xuejiao Deng, Nan Wang, MingFu Cai, Hang Su, Yafang Cheng, Lin Wang, Tuukka Petäjä, and Veli-Matti Kerminen
X5.372 |
Jiandong Wang, Hang Su, Chao Wei, Jiaping Wang, and Yafang Cheng
X5.373 |
Semivolatile Organic Compounds (SOCs) in Fine Particulate Matter(PM2.5) during Clear, Fog, and Haze Episodes in Winter in Beijing, China
Bixian Mai and Ting Wang
X5.374 |
Jiaping Wang, Wei Nie, Xuguang Chi, Jiandong Wang, Ximeng Qi, Zheng Xu, Tianyi Wang, Yicheng Shen, Hang Su, Yafang Cheng, and Aijun Ding
X5.375 |
Ting Lei, Juan Hong, Nan Ma, Xin Wang, Thomas Tuch, Alfred Wiedensohler, Ulrich Pöschl, Hang Su, and Yafang Cheng
X5.377 |
Xihao Pan, Nan Ma, Juan Hong, Wenlin Dong, Shaowen Zhu, Jiangchuan Tao, Ye Kuang, Yuxuan Zhang, Jeannine Ditas, Hang Su, and Yafang Cheng
X5.378 |
Typical VOCs degradation by the hybrids composites of Titania
Jing Sun
X5.379 |
Optical absorption properties of brown carbon aerosols in the Pearl River Delta region of China
Jun Zheng, Haobo Tan, and Zhujie Li
X5.380 |
Beatrix Rosette Mabato, Masao Gen, Yangxi Chu, and Chak Chan
X5.381 |
Meng Li, Hang Su, Ulrich Pöschl, Guo Li, and Yafang Cheng
X5.382 |
Xiaoxiao Li, Shaojie Song, Wei Zhou, Jiming Hao, and Jingkun Jiang
X5.383 |
Wei Tao, Hang Su, Pusheng Zhao, Guangjie Zheng, Ulrich Pöschl, and Yafang Cheng
X5.384 |
Contribution of hydroxymethanesulfonate (HMS) to severe winter haze in the North China Plain
Tao Ma, Hiroshi Furutani, Fengkui Duan, Takashi Kimoto, Jingkun Jiang, Yongliang Ma, Lidan Zhu, Tao Huang, Michisato Toyoda, and Kebin He