【作者】
吴礼彬；
王芃；
张强；
任红；
Zongbo Shi；
胡伟；
陈静；
谢巧蓉；
李林杰；
越思瑶；
韦莲芳；
宋琳琳；
张永根；
王子涵；
陈爽；
韦琬；
王小曼；
章炎麟；
孔少飞；
葛宝珠；
杨婷；
方运霆；
任露洁；
邓君俊；
孙业乐；
王自发；
张宏亮；
胡建林；
刘丛强；
Roy M.Harrison；
Qi Ying；
傅平青；
【Author】
Libin Wu;Peng Wang;Qiang Zhang;Hong Ren;Zongbo Shi;Wei Hu;Jing Chen;Qiaorong Xie;Linjie Li;Siyao Yue;Lianfang Wei;Linlin Song;Yonggen Zhang;Zihan Wang;Shuang Chen;Wan Wei;Xiaoman Wang;Yanlin Zhang;Shaofei Kong;Baozhu Ge;Ting Yang;Yunting Fang;Lujie Ren;Junjun Deng;Yele Sun;Zifa Wang;Hongliang Zhang;Jianlin Hu;Cong-Qiang Liu;Roy M.Harrison;Qi Ying;Pingqing Fu;Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University;Department of Atmospheric and Oceanic Sciences, Fudan University;IRDR ICo E on Risk Interconnectivity and Governance on Weather/Climate Extremes Impact and Public Health, Fudan University;Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University;Air Environmental Modeling and Pollution Controlling Key Laboratory of Sichuan Higher Education Institute, Chengdu University of Information Technology;Division of Environmental Health & Risk Management, School of Geography, Earth & Environmental Sciences, University of Birmingham;School of Environmental Science and Engineering, Tianjin University;State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences;Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences;Yale-NUIST Center on Atmospheric Environment, International Joint Laboratory on Climate and Environment Change, Nanjing University of Information Science and Technology;Department of Atmospheric Sciences, School of Environmental Studies and Department of Environmental Science and Technology, School of Environmental Studies, China University of Geosciences;Department of Environmental Science and Engineering, Fudan University;Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control,Nanjing University of Information Science and Technology;Department of Environmental Sciences/Center of Excellence in Environmental Studies, King Abdulaziz University;Zachry Department of Civil and Environmental Engineering, Texas A&M University;
【通讯作者】
傅平青;
【机构】
Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University；
Department of Atmospheric and Oceanic Sciences, Fudan University；
IRDR ICo E on Risk Interconnectivity and Governance on Weather/Climate Extremes Impact and Public Health, Fudan University；
Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University；
Air Environmental Modeling and Pollution Controlling Key Laboratory of Sichuan Higher Education Institute, Chengdu University of Information Technology；
Division of Environmental Health & Risk Management, School of Geography, Earth & Environmental Sciences, University of Birmingham；
School of Environmental Science and Engineering, Tianjin University；
State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences；
Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences；
Yale-NUIST Center on Atmospheric Environment, International Joint Laboratory on Climate and Environment Change, Nanjing University of Information Science and Technology；
Department of Atmospheric Sciences, School of Environmental Studies and Department of Environmental Science and Technology, School of Environmental Studies, China University of Geosciences；
Department of Environmental Science and Engineering, Fudan University；
Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control,Nanjing University of Information Science and Technology；
Department of Environmental Sciences/Center of Excellence in Environmental Studies, King Abdulaziz University；
Zachry Department of Civil and Environmental Engineering, Texas A&M University；
【摘要】 Aerosol ammonium（NH4+）, mainly produced from the reactions of ammonia（NH3） with acids in the atmosphere, has significant impacts on air pollution, radiative forcing, and human health. Understanding the source and formation mechanism of NH4+can provide scientific insights into air quality improvements.However, the sources of NH3 in urban areas are not well understood, and few studies focus on NH3/NH4+at different heights within the atmospheric boundary layer, which hinders a comprehensive understanding of aerosol NH4+. In this study, we perform both field observation and modeling studies（the Community Multiscale Air Quality, CMAQ） to investigate regional NH3 emission sources and vertically resolved NH4+formation mechanisms during the winter in Beijing. Both stable nitrogen isotope analyses and CMAQ model suggest that combustion-related NH3 emissions, including fossil fuel sources, NH3 slip,and biomass burning, are important sources of aerosol NH4+with more than 60% contribution occurring on heavily polluted days. In contrast, volatilization-related NH3 sources（livestock breeding, N-fertilizer application, and human waste） are dominant on clean days. Combustion-related NH3 is mostly local from Beijing, and biomass burning is likely an important NH3 source（～15%–20%） that was previously overlooked. More effective control strategies such as the two-product（e.g., reducing both SO2 and NH3） control policy should be considered to improve air quality.更多还原
【Abstract】 Aerosol ammonium（NH4+）, mainly produced from the reactions of ammonia（NH3） with acids in the atmosphere, has significant impacts on air pollution, radiative forcing, and human health. Understanding the source and formation mechanism of NH4+can provide scientific insights into air quality improvements.However, the sources of NH3 in urban areas are not well understood, and few studies focus on NH3/NH4+at different heights within the atmospheric boundary layer, which hinders a comprehensive understanding of aerosol NH4+. In this study, we perform both field observation and modeling studies（the Community Multiscale Air Quality, CMAQ） to investigate regional NH3 emission sources and vertically resolved NH4+formation mechanisms during the winter in Beijing. Both stable nitrogen isotope analyses and CMAQ model suggest that combustion-related NH3 emissions, including fossil fuel sources, NH3 slip,and biomass burning, are important sources of aerosol NH4+with more than 60% contribution occurring on heavily polluted days. In contrast, volatilization-related NH3 sources（livestock breeding, N-fertilizer application, and human waste） are dominant on clean days. Combustion-related NH3 is mostly local from Beijing, and biomass burning is likely an important NH3 source（～15%–20%） that was previously overlooked. More effective control strategies such as the two-product（e.g., reducing both SO2 and NH3） control policy should be considered to improve air quality.更多还原
【基金】 supported by the National Natural Science Foundation of China (42130513, 41905110, and 41961130384);the Royal Society Newton Advanced Fellowship, United Kingdom (NAFR1191220);the Research Grants Council of the Hong Kong Special Administrative Region, China (T24/504/17 and A-Poly U502/16)
