Molecular Composition of Oxygenated Organic Molecules and Their Contributions to Organic Aerosol in Beijing,Environmental Science & Technology

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Molecular Composition of Oxygenated Organic Molecules and Their Contributions to Organic Aerosol in Beijing
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2021-11-22 , DOI: 10.1021/acs.est.1c05191
Yonghong Wang _{1,

2,

3} , Petri Clusius ₂ , Chao Yan ₂ , Kaspar Dällenbach ₂ , Rujing Yin ₄ , Mingyi Wang ₅ , Xu-Cheng He ₂ , Biwu Chu ₃ , Yiqun Lu ₆ , Lubna Dada ₂ , Juha Kangasluoma _{1,

2} , Pekka Rantala ₂ , Chenjuan Deng ₄ , Zhuohui Lin ₁ , Weigang Wang ₇ , Lei Yao ₂ , Xiaolong Fan ₁ , Wei Du ₂ , Jing Cai ₂ , Liine Heikkinen ₂ , Yee Jun Tham ₂ , Qiaozhi Zha ₂ , Zhenhao Ling ₂ , Heikki Junninen _{2,

8} , Tuukka Petäjä ₂ , Maofa Ge ₇ , Yuesi Wang ₉ , Hong He ₃ , Douglas R Worsnop ₁₀ , Veli-Matti Kerminen ₂ , Federico Bianchi _{1,

2} , Lin Wang ₆ , Jingkun Jiang ₄ , Yongchun Liu ₁ , Michael Boy ₂ , Mikael Ehn ₂ , Neil M Donahue ₅ , Markku Kulmala _{1,

2}

Affiliation

Aerosol and Haze Laboratory, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100089, China.
Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, Helsinki 00560, Finland.
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
School of Environment, Tsinghua University, Beijing 100084, China.
Center for Atmospheric Particle Studies, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States.
Department of Environmental Science & Engineering, Fudan University, Shanghai 200438, China.
Institute of Chemistry, Chinese Academy of Sciences, Beijing 100029, China.
Institute of Physics, University of Tartu, Tartu 50090, Estonia.
Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China.
Aerodyne Research Inc., Billerica, Massachusetts 01821, United States.

The understanding at a molecular level of ambient secondary organic aerosol (SOA) formation is hampered by poorly constrained formation mechanisms and insufficient analytical methods. Especially in developing countries, SOA related haze is a great concern due to its significant effects on climate and human health. We present simultaneous measurements of gas-phase volatile organic compounds (VOCs), oxygenated organic molecules (OOMs), and particle-phase SOA in Beijing. We show that condensation of the measured OOMs explains 26–39% of the organic aerosol mass growth, with the contribution of OOMs to SOA enhanced during severe haze episodes. Our novel results provide a quantitative molecular connection from anthropogenic emissions to condensable organic oxidation product vapors, their concentration in particle-phase SOA, and ultimately to haze formation.

更新日期：2022-01-18

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