Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL088533 |
Puzzling Haze Events in China During the Coronavirus (COVID-19) Shutdown | |
Chang, Yunhua1; Huang, Ru-Jin2,3; Ge, Xinlei4; Huang, Xiangpeng4; Hu, Jianlin4; Duan, Yusen5; Zou, Zhong6; Liu, Xuejun7; Lehmann, Moritz F.8 | |
2020-06-09 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2020 |
卷号 | 47期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Switzerland |
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 (r(2) = 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. Plain Language Summary In China, there are multiple cases (e.g., the 2008 Summer Olympics in Beijing and the 2010 World Expo in Shanghai) when combustion-related emissions (e.g., NOx) were actively, and successfully, reduced to transiently improve air quality. During the extended Chinese Lunar New Year holiday in 2020 (between 24 January and 10 February), whole China was in an unprecedented state of shutdown, because most people were contained in their homes to reduce the spread of the novel coronavirus disease (COVID-19). Mobility, energy demand, and industrial output remained far below their normal levels. Nevertheless, widespread haze pollution still occurred over Eastern China. To elucidate haze formation mechanisms, we performed comprehensive and continuous measurements of aerosol chemistry and physics in and out of Shanghai before, during, and after the Chinese New Year Holiday in 2019 and 2020, respectively. We argue that the synergistic effects of long-range transport and atmospheric chemistry leading to the efficient conversion of NOx to particulate nitrate were the key of haze formation during the Chinese New Year Holiday of the COVID-19 outbreak in Shanghai. |
英文关键词 | haze fine particle novel coronavirus COVID-19 emission reduction |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000551464800033 |
WOS关键词 | BOUNDARY-LAYER HEIGHT ; LONG-TERM ; SEASONAL-VARIATIONS ; SECONDARY AEROSOL ; FINE PARTICLES ; AIR-QUALITY ; EMISSION ; LIDAR ; RADIOSONDE ; POLLUTION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/274428 |
专题 | 气候变化 |
作者单位 | 1.Nanjing Univ Informat Sci & Technol, Yale NUIST Ctr Atmospher Environm, KLME&CIC FEMD, Nanjing, Peoples R China; 2.Chinese Acad Sci, Ctr Excellence Quaternary Sci & Global Change, Inst Earth & Environm, State Key Lab Loess & Quaternary Geol, Xian, Peoples R China; 3.Chinese Acad Sci, Key Lab Aerosol Chem & Phys, Inst Earth & Environm, Xian, Peoples R China; 4.Nanjing Univ Informat Sci & Technol, Sch Environm Sci & Engn, Jiangsu Key Lab Atmospher Environm Monitoring & P, Nanjing, Peoples R China; 5.Shanghai Environm Monitoring Ctr, Shanghai, Peoples R China; 6.Fudan Univ, Dept Environm Sci & Engn, Shanghai, Peoples R China; 7.China Agr Univ, Coll Resources & Environm Sci, Beijing, Peoples R China; 8.Univ Basel, Dept Environm Sci, Basel, Switzerland |
推荐引用方式 GB/T 7714 | Chang, Yunhua,Huang, Ru-Jin,Ge, Xinlei,et al. Puzzling Haze Events in China During the Coronavirus (COVID-19) Shutdown[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(12). |
APA | Chang, Yunhua.,Huang, Ru-Jin.,Ge, Xinlei.,Huang, Xiangpeng.,Hu, Jianlin.,...&Lehmann, Moritz F..(2020).Puzzling Haze Events in China During the Coronavirus (COVID-19) Shutdown.GEOPHYSICAL RESEARCH LETTERS,47(12). |
MLA | Chang, Yunhua,et al."Puzzling Haze Events in China During the Coronavirus (COVID-19) Shutdown".GEOPHYSICAL RESEARCH LETTERS 47.12(2020). |
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