气候变化领域集成服务门户(CCPortal): Puzzling Haze Events in China During the Coronavirus (COVID-19) Shutdown

CCPortal

DOI	10.1029/2020GL088533
	Puzzling Haze Events in China During the Coronavirus (COVID-19) Shutdown
	Chang Y.; Huang R.-J.; Ge X.; Huang X.; Hu J.; Duan Y.; Zou Z.; Liu X.; Lehmann M.F.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:12
英文摘要	It is a puzzle as to why more severe haze formed during the New Year Holiday in 2020 (NYH-20), when China was in an unprecedented state of shutdown to contain the coronavirus (COVID-19) outbreak, than in 2019 (NYH-19). We performed a comprehensive measurement and modeling analysis of the aerosol chemistry and physics at multiple sites in China (mainly in Shanghai) before, during, and after NYH-19 and NYH-20. Much higher secondary aerosol fraction in PM2.5 were observed during NYH-20 (73%) than during NYH-19 (59%). During NYH-20, PM2.5 levels correlated significantly with the oxidation ratio of nitrogen (r2 = 0.77, p < 0.01), and aged particles from northern China were found to impede atmospheric new particle formation and growth in Shanghai. A markedly enhanced efficiency of nitrate aerosol formation was observed along the transport pathways during NYH-20, despite the overall low atmospheric NO2 levels. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Aerosols; Atmospheric chemistry; Chemical analysis; Aerosol chemistry; Comprehensive measurement; Enhanced efficiency; Model analysis; New particle formation; Nitrate aerosols; Secondary aerosols; Transport pathways; Atmospheric movements; aerosol composition; aerosol formation; haze; nitrate; nitrogen; oxidation; particle size; viral disease; virus; China; Shanghai; Coronavirus
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/170217
作者单位	KLME & CIC-FEMD, Yale-NUIST Center on Atmospheric Environment, Nanjing University of Information Science and Technology, Nanjing, China; State Key Laboratory of Loess and Quaternary Geology, Center for Excellence in Quaternary Science and Global Change, and Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth and Environment, Chinese Academy of Sciences, Xi'an, China; Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, China; Shanghai Environmental Monitoring Center, Shanghai, China; Department of Environmental Science and Engineering, Fudan University, Shanghai, China; College of Resources and Environmental Sciences, China Agricultural University, Beijing, China; Department of Environmental Sciences, University of Basel, Basel, Switzerland
推荐引用方式 GB/T 7714	Chang Y.,Huang R.-J.,Ge X.,et al. Puzzling Haze Events in China During the Coronavirus (COVID-19) Shutdown[J],2020,47(12).
APA	Chang Y..,Huang R.-J..,Ge X..,Huang X..,Hu J..,...&Lehmann M.F..(2020).Puzzling Haze Events in China During the Coronavirus (COVID-19) Shutdown.Geophysical Research Letters,47(12).
MLA	Chang Y.,et al."Puzzling Haze Events in China During the Coronavirus (COVID-19) Shutdown".Geophysical Research Letters 47.12(2020).