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  1. Article ; Online: Enhanced atmospheric oxidation capacity and associated ozone increases during COVID-19 lockdown in the Yangtze River Delta.

    Wang, Yu / Zhu, Shengqiang / Ma, Jinlong / Shen, Juanyong / Wang, Pengfei / Wang, Peng / Zhang, Hongliang

    The Science of the total environment

    2021  Volume 768, Page(s) 144796

    Abstract: Aggressive air pollution control in China since 2013 has achieved sharp decreases in fine particulate matter ( ... ...

    Abstract Aggressive air pollution control in China since 2013 has achieved sharp decreases in fine particulate matter (PM
    MeSH term(s) Air Pollutants/analysis ; Air Pollution ; COVID-19 ; China ; Communicable Disease Control ; Environmental Monitoring ; Humans ; Ozone/analysis ; Rivers ; SARS-CoV-2
    Chemical Substances Air Pollutants ; Ozone (66H7ZZK23N)
    Language English
    Publishing date 2021-01-07
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2020.144796
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  2. Article: Enhanced atmospheric oxidation capacity and associated ozone increases during COVID-19 lockdown in the Yangtze River Delta

    Wang, Yu / Zhu, Shengqiang / Ma, Jinlong / Shen, Juanyong / Wang, Pengfei / Wang, Peng / Zhang, Hongliang

    Science of the total environment. 2021 May 10, v. 768

    2021  

    Abstract: ... a significant increase of atmospheric oxidation capacity (AOC) indicated by enhanced oxidants levels (up to +25 ... emissions (>50%) from transportation. However, O₃ increased in the Yangtze River Delta (YRD), which cannot ... especially in southern Jiangsu, Shanghai and northern Zhejiang, inducing the elevated O₃ during lockdown ...

    Abstract Aggressive air pollution control in China since 2013 has achieved sharp decreases in fine particulate matter (PM₂.₅), along with increased ozone (O₃) concentrations. Due to the pandemic of coronavirus disease 2019 (COVID-19), China imposed nationwide restriction, leading to large reductions in economic activities and associated emissions. In particular, large decreases were found in nitrogen oxides (NOₓ) emissions (>50%) from transportation. However, O₃ increased in the Yangtze River Delta (YRD), which cannot be fully explained by changes in NOₓ and volatile organic compound (VOCs) emissions. In this study, the Community Multi-scale Air Quality model was used to investigate O₃ increase in the YRD. Our results show a significant increase of atmospheric oxidation capacity (AOC) indicated by enhanced oxidants levels (up to +25%) especially in southern Jiangsu, Shanghai and northern Zhejiang, inducing the elevated O₃ during lockdown. Moreover, net P(HOₓ) of 0.4 to 1.6 ppb h⁻¹ during lockdown (Case 2) was larger than the case without lockdown (Case 1), mainly resulting in the enhanced AOC and higher O₃ production rate (+12%). This comprehensive analysis improves our understanding on AOC and associated O₃ formation, which helps to design effective strategies to control O₃.
    Keywords COVID-19 infection ; air pollution control ; air quality ; environment ; models ; nitrogen ; oxidation ; ozone ; pandemic ; particulates ; river deltas ; transportation ; volatile organic compounds ; China ; Yangtze River
    Language English
    Dates of publication 2021-0510
    Publishing place Elsevier B.V.
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2020.144796
    Database NAL-Catalogue (AGRICOLA)

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