Heterogeneous effects of COVID-19 lockdown measures on air quality in Northern China

Wang, Junfeng; Xu, Xiaoya; Wang, Shimeng; He, Shutong; Li, Xiao; He, Pan

doi:10.1016/j.apenergy.2020.116179

Cited by 62 publications

(51 citation statements)

References 45 publications

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“…Similar to much other literature on research results of pollutant variations from the perspective of epidemic lockdown [55,56], during the lockdown period in Shenyang, the concentrations of various pollutants decreased to varying degrees, with the largest decline of PM 2.5 (46.4%), NO 2 has the smallest drop, but also reached 34.4%. On the contrary, the ozone concentration increased continuously during this period, with an increase of 69.7%.…”

Section: Discussionsupporting

confidence: 81%

Assessing the Impact of Lockdown on Atmospheric Ozone Pollution Amid the First Half of 2020 in Shenyang, China

Wang

Fang

2020

IJERPH

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During the eruption of COVID-19, a citywide lockdown was executed from 26 January to 23 March 2020, in Shenyang, in which the ozone pollution has recorded significant variations. This paper mainly anatomized the comprehensive characteristics and evolution trends of ozone pollution based on the lockdown period in the first half of 2020. Using the Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) model and cluster analysis method to establish backward trajectories and channels, the spatial transport process of ozone in the preset period and the causation of typical ozone pollution events were investigated in depth. The results demonstrated that: The ozone concentration pollution in the first half of 2020 was increased than last year. During the lockdown period, the basic pollutants levels were lower than that in pre-lockdown under different proportions, except O3 maximum 8-h moving average (MDA8) was increased by 69.7%, accompanied by the delay of daily peak value, increased pollution days and longer pollution cycle. The typical pollution events were highly consistent with the evolution path of fine aerosol compelled by extreme weather. The ozone concentration and the atmospheric oxidation capacity can be stably maintained at a low level when NO2 concentration remained at 50–70 μg/m3, no matter how much the AQI was. Meanwhile, ozone concentration in the downwind suburban was as low as the central city and soared in few stations amid post-lockdown, simultaneous the correlation between ozone and other pollutants converted from negative to positive. The trajectory indicated that the pollution sources during the lockdown and pre-lockdown were basically Southern Russia, Inner Mongolia, and the three provinces of Northeast China, the pollution from the Bohai Sea provoked ozone pollutants in Shenyang to rebound briskly amid post-lockdown, the pollution of neighboring countries and areas would have a stronger impact on air quality under the effect of lockdown.

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Section: Discussionsupporting

confidence: 81%

Assessing the Impact of Lockdown on Atmospheric Ozone Pollution Amid the First Half of 2020 in Shenyang, China

Wang

Fang

2020

IJERPH

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“…In five Polish cities during the lockdown period, the concentration of PM 2.5 , PM 10 , SO 2 , and NO 2 were reduced by 11.1-26.4%, 8.6-33.9%, 18-23%, 10-19%, respectively, compared to the corresponding periods in 2018 and 2019 [32]. Different studies confirm that reduced economic activity and traffic restrictions have led to air pollution reduction across China, where NO 2 , PM 10 , PM 2.5 , and CO decreased by 33.1-37.8%, 33.6%, 7.4-21.5%, and 12.7-20.4%, respectively [33,34], preventing environmental pollution.…”

Section: Introductionmentioning

confidence: 98%

COVID-19 and Air Pollution: Measuring Pandemic Impact to Air Quality in Five European Countries

Skirienė

Stasiškienė

2021

Atmosphere

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The rapid spread of the coronavirus (COVID-19) pandemic affected the economy, trade, transport, health care, social services, and other sectors. To control the rapid dispersion of the virus, most countries imposed national lockdowns and social distancing policies. This led to reduced industrial, commercial, and human activities, followed by lower air pollution emissions, which caused air quality improvement. Air pollution monitoring data from the European Environment Agency (EEA) datasets were used to investigate how lockdown policies affected air quality changes in the period before and during the COVID-19 lockdown, comparing to the same periods in 2018 and 2019, along with an assessment of the Index of Production variation impact to air pollution changes during the pandemic in 2020. Analysis results show that industrial and mobility activities were lower in the period of the lockdown along with the reduced selected pollutant NO2, PM2.5, PM10 emissions by approximately 20–40% in 2020.

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“…The majority of studies mainly explored atmospheric environmental changes during the pandemic. The pandemic has led to production shutdowns and significant decreases in travel, thus significantly influencing pollution emissions and air quality ( Le et al, 2020 ; Han et al, 2020 ; Wang et al, 2020 ; He et al, 2021 ; Shen et al, 2021 ; Wang et al, 2021 ). For example, Liu et al estimated that global CO 2 emissions (1,551 metric tons) sharply decreased by 9% in the first half of 2020 compared with those in the same period of 2019 ( Liu et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

What medical waste management system may cope With COVID-19 pandemic: Lessons from Wuhan

Chen

Fang

et al. 2021

Resources, Conservation and Recycling

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The global pandemic caused by the 2019 coronavirus (COVID-19) has led to a dramatic increase in medical waste worldwide. This tremendous increase in medical waste is an important transmission medium for the virus and thus poses new and serious challenges to urban medical waste management. This study investigates the response of medical waste management to the COVID-19 pandemic and subsequent changes in Wuhan City based on the most detailed data available, including waste generation, storage, transportation, and disposal. The results show that despite a 5-fold increase in the demand for daily medical waste disposal in the peak period, the quick responses in the storage, transportation, and disposal sectors during the pandemic ensured that all medical waste was disposed of within 24 hours of generation. Furthermore, this paper discusses medical waste management during future emergencies in Wuhan. The ability of the medical waste management system in Wuhan to successfully cope with the rapid increase in medical waste caused by major public health emergencies has important implications for other cities suffering from the pandemic and demonstrates the need to establish resilient medical emergency systems in urban areas.

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Heterogeneous effects of COVID-19 lockdown measures on air quality in Northern China

Cited by 62 publications

References 45 publications

Assessing the Impact of Lockdown on Atmospheric Ozone Pollution Amid the First Half of 2020 in Shenyang, China

Assessing the Impact of Lockdown on Atmospheric Ozone Pollution Amid the First Half of 2020 in Shenyang, China

COVID-19 and Air Pollution: Measuring Pandemic Impact to Air Quality in Five European Countries

What medical waste management system may cope With COVID-19 pandemic: Lessons from Wuhan

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