A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Increased secondary aerosol contribution and possible processing on polluted winter days in China
China experiences severe particulate pollution, especially in winter, and determining the characteristics of particulate matter (PM) during pollution events is imperative for understanding the sources and causes of the pollution. However, inconsistencies have been found in the aerosol composition, sources and secondary processing among reported studies. Modern meta-analysis was used to probe the PM chemical characteristics and processing in winter at four representative regions of China, and the first finding was that secondary aerosol formation was the major effect factor for PM pollution. The secondary inorganic species behaved differently in the four regions: sulfate, nitrate, and ammonium increased in the Beijing–Tianjin–Hebei (BTH) and Guanzhong (GZ) areas, but only nitrate increased in the Pearl River Delta (PRD) and Yangtze River Delta (YRD) regions. The increased production of secondary organic aerosol (SOA) was probably caused by aqueous-phase processing in the GZ and BTH regions and by photochemical reactions in the PRD. Finally, we suggest future AMS/ACSM observations should focus on the aerosol characteristics in rural areas in winter in China. Keywords: Secondary aerosols, Aqueous-phase reactions, Photochemical reactions, Polluted days, Winter
Increased secondary aerosol contribution and possible processing on polluted winter days in China
China experiences severe particulate pollution, especially in winter, and determining the characteristics of particulate matter (PM) during pollution events is imperative for understanding the sources and causes of the pollution. However, inconsistencies have been found in the aerosol composition, sources and secondary processing among reported studies. Modern meta-analysis was used to probe the PM chemical characteristics and processing in winter at four representative regions of China, and the first finding was that secondary aerosol formation was the major effect factor for PM pollution. The secondary inorganic species behaved differently in the four regions: sulfate, nitrate, and ammonium increased in the Beijing–Tianjin–Hebei (BTH) and Guanzhong (GZ) areas, but only nitrate increased in the Pearl River Delta (PRD) and Yangtze River Delta (YRD) regions. The increased production of secondary organic aerosol (SOA) was probably caused by aqueous-phase processing in the GZ and BTH regions and by photochemical reactions in the PRD. Finally, we suggest future AMS/ACSM observations should focus on the aerosol characteristics in rural areas in winter in China. Keywords: Secondary aerosols, Aqueous-phase reactions, Photochemical reactions, Polluted days, Winter
Increased secondary aerosol contribution and possible processing on polluted winter days in China
Yichen Wang (author) / Ji Chen (author) / Qiyuan Wang (author) / Quande Qin (author) / Jianhuai Ye (author) / Yuemei Han (author) / Li Li (author) / Wei Zhen (author) / Qiang Zhi (author) / Yixuan Zhang (author)
2019
Article (Journal)
Electronic Resource
Unknown
Metadata by DOAJ is licensed under CC BY-SA 1.0
Wood Smoke Contribution to Winter Aerosol in Fresno, CA
| Taylor & Francis Verlag | 2006
Secondary aerosol formation in winter haze over the Beijing-Tianjin-Hebei Region, China
| Springer Verlag | 2021
Processes Influencing Secondary Aerosol Formation in the San Joaquin Valley during Winter
| Taylor & Francis Verlag | 2006
Haze formation in China： Importance of secondary aerosol
| Online Contents | 2015