2020年新冠疫情封锁管控下北京空气污染物周末效应的变化
Changing weekend effects of air pollutants in Beijing under 2020 COVID-19 lockdown controls.
作者信息
Wu Lingyun, Xie Junfei, Kang Keyu
机构信息
State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029 China.
Beijing Key Laboratory of Ecological Function Assessment and Regulation Technology of Green Space, Beijing Institute of Landscape Architecture, Beijing, 100102 China.
出版信息
NPJ Urban Sustain. 2022;2(1):23. doi: 10.1038/s42949-022-00070-0. Epub 2022 Sep 22.
In 2020, lockdown control measures were implemented to prevent a novel coronavirus disease 19 (COVID-19) pandemic in many places of the world, which largely reduced human activities. Here, we detect changes in weekly cycles of PM, NO, SO, CO and O concentrations in 2020 compared to 2018 and 2019 using the observed data at 32 stations in Beijing. Distinct weekly cycles of annual average PM, NO, SO and CO concentrations existed in 2018, while the weekend effects changed in 2020. In addition, the weekly cycle magnitudes of PM, NO, SO, and O concentrations in 2020 decreased by 29.60-69.26% compared to 2018, and 4.49-47.21% compared to 2019. We propose that the changing weekend effects and diminishing weekly cycle magnitudes may be tied to the COVID-19 lockdown controls, which changed human working and lifestyle cycles and reduced anthropogenic emissions of air pollutants on weekends more than weekdays.
2020年，世界上许多地方都实施了封锁控制措施以防止新型冠状病毒肺炎（COVID-19）大流行，这在很大程度上减少了人类活动。在此，我们利用北京32个站点的观测数据，检测了2020年与2018年和2019年相比，PM、NO、SO、CO和O浓度的每周周期变化。2018年，年平均PM、NO、SO和CO浓度存在明显的每周周期，而2020年周末效应发生了变化。此外，2020年PM、NO、SO和O浓度的每周周期幅度与2018年相比下降了29.60%-69.26%，与2019年相比下降了4.49%-47.21%。我们认为，周末效应的变化和每周周期幅度的减小可能与COVID-19封锁控制有关，这改变了人类的工作和生活方式周期，并使周末空气污染物的人为排放量比工作日减少得更多。
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