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Comprehensive Insights Into O3 Changes During the COVID-19 From O3 Formation Regime and Atmospheric Oxidation Capacity.
Zhu, Shengqiang; Poetzscher, James; Shen, Juanyong; Wang, Siyu; Wang, Peng; Zhang, Hongliang.
  • Zhu S; Department of Environmental Science and Engineering Fudan University Shanghai China.
  • Poetzscher J; Department of Environmental Science and Engineering Fudan University Shanghai China.
  • Shen J; School of Environmental Science and Engineering Nanjing University of Information Science and Technology Nanjing China.
  • Wang S; School of Environmental Science and Engineering Shanghai Jiao Tong University Shanghai China.
  • Wang P; Department of Environmental Science and Engineering Fudan University Shanghai China.
  • Zhang H; Department of Civil and Environmental Engineering Hong Kong Polytechnic University Hong Kong China.
Geophys Res Lett ; 48(10): e2021GL093668, 2021 May 28.
Article in English | MEDLINE | ID: covidwho-1272831
ABSTRACT
Economic activities and the associated emissions have significantly declined during the 2019 novel coronavirus (COVID-19) pandemic, which has created a natural experiment to assess the impact of the emitted precursor control policy on ozone (O3) pollution. In this study, we utilized comprehensive satellite, ground-level observations, and source-oriented chemical transport modeling to investigate the O3 variations during the COVID-19 pandemic in China. Here, we found that the significant elevated O3 in the North China Plain (40%) and Yangtze River Delta (35%) were mainly attributed to the enhanced atmospheric oxidation capacity (AOC) in these regions, associated with the meteorology and emission reduction during lockdown. Besides, O3 formation regimes shifted from VOC-limited regimes to NOx-limited and transition regimes with the decline of NOx during lockdown. We suggest that future O3 control policies should comprehensively consider the effects of AOC on the O3 elevation and coordinated regulations of the O3 precursor emissions.

Full text: Available Collection: International databases Database: MEDLINE Type of study: Observational study / Prognostic study Topics: Variants Language: English Journal: Geophys Res Lett Year: 2021 Document Type: Article

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Full text: Available Collection: International databases Database: MEDLINE Type of study: Observational study / Prognostic study Topics: Variants Language: English Journal: Geophys Res Lett Year: 2021 Document Type: Article