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Comprehensive Insights Into O 3 Changes During the COVID‐19 From O 3 Formation Regime and Atmospheric Oxidation Capacity
Author(s) -
Zhu Shengqiang,
Poetzscher James,
Shen Juanyong,
Wang Siyu,
Wang Peng,
Zhang Hongliang
Publication year - 2021
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2021gl093668
Subject(s) - covid-19 , ozone , environmental science , atmospheric sciences , pandemic , air pollution , china , pollution , satellite , yangtze river , meteorology , environmental chemistry , chemistry , geography , physics , medicine , ecology , disease , organic chemistry , archaeology , pathology , virology , astronomy , outbreak , infectious disease (medical specialty) , biology
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 (O 3 ) pollution. In this study, we utilized comprehensive satellite, ground‐level observations, and source‐oriented chemical transport modeling to investigate the O 3 variations during the COVID‐19 pandemic in China. Here, we found that the significant elevated O 3 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, O 3 formation regimes shifted from VOC‐limited regimes to NO x ‐limited and transition regimes with the decline of NO x during lockdown. We suggest that future O 3 control policies should comprehensively consider the effects of AOC on the O 3 elevation and coordinated regulations of the O 3 precursor emissions.