气候变化领域集成服务门户(CCPortal): Markedly Enhanced Levels of Peroxyacetyl Nitrate (PAN) During COVID-19 in Beijing

CCPortal

DOI	10.1029/2020GL089623
	Markedly Enhanced Levels of Peroxyacetyl Nitrate (PAN) During COVID-19 in Beijing
	Qiu Y.; Ma Z.; Li K.; Lin W.; Tang Y.; Dong F.; Liao H.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:19
英文摘要	High levels of secondary air pollutants during COVID-19 in China have aroused great concern. In Beijing, measured daily mean peroxyacetyl nitrate (PAN) concentrations reached 4 ppb over the lockdown period (24 January to 15 February), whose averages were 2–3 times that before lockdown (1–23 January). The lockdown PAN levels also reached a high historical record based on our long-term measurements (2016–2019). Unlike ozone and PM2.5, PAN formation depends on less complex photochemistry between NOx and volatile organic compounds (VOCs), providing a novel approach to investigate the wintertime photochemistry during COVID-19. The GEOS-Chem simulations suggest a markedly enhanced photochemistry by a factor of 2 during the lockdown. Change of meteorology featuring with anomalous wind convergence under higher temperatures is the main reason for enhanced photochemical formation of PAN, while chemically nonlinear feedbacks also play a role. Our results suggest implementing targeted VOC emission controls in the context of increasing photochemical pollution over this complex polluted region. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Chemical reactions; Nitrates; Peroxides; Photochemical forming; Volatile organic compounds; Anomalous winds; Historical records; Long-term measurements; Peroxyacetyl nitrates; Photochemical pollution; Secondary air; VOC emission control; Air pollution; atmospheric pollution; carbon emission; emission control; epidemic; historical record; peroxyacetyl nitrate; photochemistry; viral disease; volatile organic compound; Beijing [China]; China
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169678
作者单位	Institute of Urban Meteorology, China Meteorological Administration, Beijing, China; Beijing Shangdianzi Regional Atmosphere Watch Station, Beijing, China; Environmental Meteorology Forecast Center of Beijing-Tianjin-Hebei, Beijing, China; John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, United States; College of Life and Environmental Science, Minzu University of China, Beijing, China; Tianjin Environmental Meteorology Center, Tianjin, China; Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, China
推荐引用方式 GB/T 7714	Qiu Y.,Ma Z.,Li K.,et al. Markedly Enhanced Levels of Peroxyacetyl Nitrate (PAN) During COVID-19 in Beijing[J],2020,47(19).
APA	Qiu Y..,Ma Z..,Li K..,Lin W..,Tang Y..,...&Liao H..(2020).Markedly Enhanced Levels of Peroxyacetyl Nitrate (PAN) During COVID-19 in Beijing.Geophysical Research Letters,47(19).
MLA	Qiu Y.,et al."Markedly Enhanced Levels of Peroxyacetyl Nitrate (PAN) During COVID-19 in Beijing".Geophysical Research Letters 47.19(2020).