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Sci Bull (Beijing)

Title:		Nonagricultural emissions enhance dimethylamine and modulate urban atmospheric nucleation
Author(s):		Chang Y; Ling Q; Ge X; Yuan X; Zhou S; Cheng K; Mao J; Huang D; Hu Q; Lu J; Cui S; Gao Y; Lu Y; Zhu L; Tan W; Guo S; Hu M; Wang H; Huang C; Huang RJ; Zhang Y; Hu J;
Address:		"Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, NUIST Center on Atmospheric Environment, Nanjing University of Information Science & Technology (NUIST), Nanjing 210044, China. Electronic address: changy13@nuist.edu.cn. Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, NUIST Center on Atmospheric Environment, Nanjing University of Information Science & Technology (NUIST), Nanjing 210044, China. Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science & Technology, Nanjing 210044, China. State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China. State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex, Shanghai Academy of Environmental Sciences, Shanghai 200233, China. TOFWERK China, Nanjing 211800, China. State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China. State Key Laboratory of Loess and Quaternary Geology, Center for Excellence in Quaternary Science and Global Change, Key Laboratory of Aerosol Chemistry & Physics, Institute of Earth and Environment, Chinese Academy of Sciences, Xi'an 710061, China. Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science & Technology, Nanjing 210044, China. Electronic address: jianlinhu@nuist.edu.cn"
Journal Title:		Sci Bull (Beijing)
Year:		2023
Volume:		20230530
Issue:		13
Page Number:		1447 - 1455
DOI:		10.1016/j.scib.2023.05.033
ISSN/ISBN:		2095-9281 (Electronic) 2095-9273 (Linking)
Abstract:		"Gas-phase dimethylamine (DMA) has recently been identified as one of the most important vapors to initiate new particle formation (NPF), even in China's polluted atmosphere. Nevertheless, there remains a fundamental need for understanding the atmospheric life cycle of DMA, particularly in urban areas. Here we pioneered large-scale mobile observations of the DMA concentrations within cities and across two pan-region transects of north-to-south ( approximately 700 km) and west-to-east ( approximately 2000 km) in China. Unexpectedly, DMA concentrations (mean +/- 1sigma) in South China with scattered croplands (0.018 +/- 0.010 ppbv, 1 ppbv=10(-9) L/L) were over three times higher than those in the north with contiguous croplands (0.005 +/- 0.001 ppbv), suggesting that nonagricultural activities may be an important source of DMA. Particularly in non-rural regions, incidental pulsed industrial emissions led to some of the highest DMA concentration levels in the world (>2.3 ppbv). Besides, in highly urbanized areas of Shanghai, supported by direct source-emission measurements, the spatial pattern of DMA was generally correlated with population (R(2) = 0.31) due to associated residential emissions rather than vehicular emissions. Chemical transport simulations further show that in the most populated regions of Shanghai, residential DMA emissions can contribute for up to 78% of particle number concentrations. Shanghai is a case study for populous megacities, and the impacts of nonagricultural emissions on local DMA concentration and nucleation are likely similar for other major urban regions globally"
Keywords:		Amines New particle formation Non-agricultural sources Urban atmosphere Volatile organic compounds;
Notes:		"PubMed-not-MEDLINEChang, Yunhua Ling, Qingyang Ge, Xinlei Yuan, Xiangyang Zhou, Shengqian Cheng, Kai Mao, Jianjiong Huang, Dandan Hu, Qingyao Lu, Jun Cui, Shijie Gao, Yaqing Lu, Yiqun Zhu, Liang Tan, Wen Guo, Song Hu, Min Wang, Hongli Huang, Cheng Huang, Ru-Jin Zhang, Yuanhang Hu, Jianlin eng Netherlands 2023/06/17 Sci Bull (Beijing). 2023 Jul 15; 68(13):1447-1455. doi: 10.1016/j.scib.2023.05.033. Epub 2023 May 30"