首页|Dominant contribution of combustion-related ammonium during haze pollution in Beijing

Dominant contribution of combustion-related ammonium during haze pollution in Beijing

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Aerosol ammonium(NH4+),mainly produced from the reactions of ammonia(NH3)with acids in the atmo-sphere,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 under-standing 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 over-looked.More effective control strategies such as the two-product(e.g.,reducing both SO2 and NH3)con-trol policy should be considered to improve air quality.

Particulate ammoniumNitrogen isotopePM2.5The Community Multiscale Air Quality(CMAQ)Control policy

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

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Institute of Surface-Earth System Science,School of Earth System Science,Tianjin University,Tianjin 300072,China

Department of Atmospheric and Oceanic Sciences,Fudan University,Shanghai 200438,China

IRDR ICoE on Risk Interconnectivity and Governance on Weather/Climate Extremes Impact and Public Health,Fudan University,Shanghai 200438,China

Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System Science,Tsinghua University,Beijing 100084,China

Air Environmental Modeling and Pollution Controlling Key Laboratory of Sichuan Higher Education Institute,Chengdu University of Information Technology,Chengdu 610225,China

Division of Environmental Health&Risk Management,School of Geography,Earth&Environmental Sciences,University of Birmingham,Birmingham B15 2TT,UK

School of Environmental Science and Engineering,Tianjin University,Tianjin 300072,China

State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China

Key Laboratory of Forest Ecology and Management,Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110164,China

Yale-NUIST Center on Atmospheric Environment,International Joint Laboratory on Climate and Environment Change,Nanjing University of Information Science and Technology,Nanjing 210044,China

Department of Atmospheric Sciences,School of Environmental Studies and Department of Environmental Science and Technology,School of Environmental Studies,China University of Geosciences,Wuhan 430074,China

Department of Environmental Science and Engineering Fudan University,Shanghai 200438,China

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,Nanjing 210044,China

Department of Environmental Sciences/Center of Excellence in Environmental Studies,King Abdulaziz University,Jeddah 21589,Saudi Arabia

Zachry Department of Civil and Environmental Engineering,Texas A&M University,College Station TX 77843-3136,USA

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaRoyal Society Newton Advanced Fellowship,United KingdomResearch Grants Council of the Hong Kong Special Administrative Region,ChinaResearch Grants Council of the Hong Kong Special Administrative Region,China

421305134190511041961130384NAF\R1\191220T24/504/17A-PolyU502/16

2024

10.1016/j.scib.2024.01.002

科学通报(英文版)
中国科学院

科学通报(英文版)

CSTPCD
ISSN：1001-6538
年,卷(期)：2024.69(7)
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