气候变化领域集成服务门户(CCPortal): Ozone pollution in the North China Plain spreading into the late-winter haze season

CCPortal

DOI	10.1073/pnas.2015797118
	Ozone pollution in the North China Plain spreading into the late-winter haze season
	Li K.; Jacob D.J.; Liao H.; Qiu Y.; Shen L.; Zhai S.; Bates K.H.; Sulprizio M.P.; Song S.; Lu X.; Zhang Q.; Zheng B.; Zhang Y.; Zhang J.; Lee H.C.; Kuk S.K.
发表日期	2021
ISSN	00278424
卷号	118 期号:10
英文摘要	Surface ozone is a severe air pollution problem in the North China Plain, which is home to 300 million people. Ozone concentrations are highest in summer, driven by fast photochemical production of hydrogen oxide radicals (HOx) that can overcome the radical titration caused by high emissions of nitrogen oxides (NOx) from fuel combustion. Ozone has been very low during winter haze (particulate) pollution episodes. However, the abrupt decrease of NOx emissions following the COVID-19 lockdown in January 2020 reveals a switch to fast ozone production during winter haze episodes with maximum daily 8-h average (MDA8) ozone concentrations of 60 to 70 parts per billion. We reproduce this switch with the GEOS-Chem model, where the fast production of ozone is driven by HOx radicals from photolysis of formaldehyde, overcoming radical titration from the decreased NOx emissions. Formaldehyde is produced by oxidation of reactive volatile organic compounds (VOCs), which have very high emissions in the North China Plain. This remarkable switch to an ozone-producing regime in January–February following the lockdown illustrates a more general tendency from 2013 to 2019 of increasing winter–spring ozone in the North China Plain and increasing association of high ozone with winter haze events, as pollution control efforts have targeted NOx emissions (30% decrease) while VOC emissions have remained constant. Decreasing VOC emissions would avoid further spreading of severe ozone pollution events into the winter–spring season. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Air quality; China; Emission control; Haze season; Wintertime ozone
语种	英语
scopus关键词	nitrogen oxide; ozone; volatile organic compound; air pollution; chemistry; China; crop; environmental monitoring; human; pandemic; particulate matter; pollution; public health; season; Air Pollution; China; COVID-19; Crops, Agricultural; Environmental Monitoring; Environmental Pollution; Humans; Nitrogen Oxides; Ozone; Pandemics; Particulate Matter; Public Health; Seasons; Volatile Organic Compounds
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180413
作者单位	Harvard–NUIST Joint Laboratory for Air Quality and Climate, Nanjing University of Information Science and Technology, Nanjing, 210044, China; John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, United States; Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Environmental Meteorology Forecast Center of Beijing-Tianjin-Hebei, Beijing, 100089, China; Department of Earth System Science, Tsinghua University, Beijing, 100084, China; Institute of Environment and Ecology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China; Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, Chi...
推荐引用方式 GB/T 7714	Li K.,Jacob D.J.,Liao H.,et al. Ozone pollution in the North China Plain spreading into the late-winter haze season[J],2021,118(10).
APA	Li K..,Jacob D.J..,Liao H..,Qiu Y..,Shen L..,...&Kuk S.K..(2021).Ozone pollution in the North China Plain spreading into the late-winter haze season.Proceedings of the National Academy of Sciences of the United States of America,118(10).
MLA	Li K.,et al."Ozone pollution in the North China Plain spreading into the late-winter haze season".Proceedings of the National Academy of Sciences of the United States of America 118.10(2021).