Spatiotemporal impact of the COVID-19 pandemic lockdown on air quality pattern in Nanjing, China DOI Creative Commons
Fei Sun, Raja Asif Wagan, Ahmad Hasnain

et al.

Frontiers in Environmental Science, Journal Year: 2022, Volume and Issue: 10

Published: Oct. 11, 2022

In response to the COVID-19 outbreak, severe steps have been taken control its rapid spread by countries globally. A nationwide lockdown was executed at end of January 2020 in China, which resulted a significant change and an improvement air quality patterns. this study, objectives were assess spatiotemporal impact on Nanjing, China. The present study researched six pollutant parameters, namely, PM 10 , 2.5 SO 2 NO CO, O 3 . data divided into periods, P1–P3: pre-lockdown, during lockdown, after P4–P6: 2017–19 (same dates lockdown). results reveal that period, drop observed. According our findings, CO concentrations reduced -33.03%, -35.41%, -21.26%, -39.79%, -20.65%, respectively, while concentration significantly increased average 104.85% Nanjing. From previous years variations, (-40.60%), (-40.02%), (-54.19%), (-33.60%), (23.16%) also reduced, (10.83%). Moreover, compared with those levels 2.84%, 28.55%, 4.68%, 16.44%, 37.36%, up -14.34% outcomes provide roadmap for scientific community local administration make policies pollution.

Language: Английский

The global impacts of COVID-19 lockdowns on urban air pollution DOI Creative Commons
Georgios I. Gkatzelis, J. B. Gilman, Steven S. Brown

et al.

Elementa Science of the Anthropocene, Journal Year: 2021, Volume and Issue: 9(1)

Published: Jan. 1, 2021

The coronavirus-19 (COVID-19) pandemic led to government interventions limit the spread of disease which are unprecedented in recent history; for example, stay at home orders sudden decreases atmospheric emissions from transportation sector. In this review article, current understanding influence emission reductions on pollutant concentrations and air quality is summarized nitrogen dioxide (NO2), particulate matter (PM2.5), ozone (O3), ammonia, sulfur dioxide, black carbon, volatile organic compounds, carbon monoxide (CO). first 7 months following onset pandemic, more than 200 papers were accepted by peer-reviewed journals utilizing observations ground-based satellite instruments. Only about one-third literature incorporates a specific method meteorological correction or normalization comparing data lockdown period with prior reference despite importance doing so interpretation results. We use stringency index (SI) as an indicator severity measures show how key pollutants change SI increases. observed decrease NO2 increasing general agreement inventories that account lockdown. Other compounds such O3, PM2.5, CO also broadly covered. Due chemistry O3 PM2.5 concentrations, their responses may not be linear respect primary pollutants. At most sites, we found increased, whereas decreased slightly, SI. Changes other understudied. highlight future research needs emerging sets preview state atmosphere world targeted permanent emissions. Finally, emphasize need effects meteorology, trends, when determining concentrations.

Language: Английский

Citations

219
The effects of socioeconomic factors on particulate matter concentration in China's: New evidence from spatial econometric model DOI Open Access
Uzair Aslam Bhatti, Shah Marjan, Abdul Wahid

et al.

Journal of Cleaner Production, Journal Year: 2023, Volume and Issue: 417, P. 137969 - 137969

Published: July 3, 2023

Language: Английский

Citations

40
Changes in the concentration and composition of urban aerosols during the COVID-19 lockdown DOI Creative Commons
Álvaro Clemente, Eduardo Yubero, J.F. Nicolás

et al.

Environmental Research, Journal Year: 2021, Volume and Issue: 203, P. 111788 - 111788

Published: July 31, 2021

This work investigates the impact of COVID-19 restrictive measures on mass concentrations PM

Language: Английский

Citations

43
Assessing the ambient air quality patterns associated to the COVID-19 outbreak in the Yangtze River Delta: A random forest approach DOI
Ahmad Hasnain, Yehua Sheng, Muhammad Zaffar Hashmi

et al.

Chemosphere, Journal Year: 2022, Volume and Issue: 314, P. 137638 - 137638

Published: Dec. 21, 2022

Language: Английский

Citations

32
Impact of urbanization on air quality in the Yangtze River Delta during the COVID-19 lockdown in China DOI
Lijuan Shen, Honglei Wang, Bin Zhu

et al.

Journal of Cleaner Production, Journal Year: 2021, Volume and Issue: 296, P. 126561 - 126561

Published: Feb. 28, 2021

Language: Английский

Citations

36
Air Pollution Characteristics during the 2022 Beijing Winter Olympics DOI Open Access

Fangjie Chu,

Chengao Gong,

Shuang Sun

et al.

International Journal of Environmental Research and Public Health, Journal Year: 2022, Volume and Issue: 19(18), P. 11616 - 11616

Published: Sept. 15, 2022

Using air pollution monitoring data from 31 January to March 2022, we evaluated quality trends in Beijing and Zhangjiakou before after the 2022 Winter Olympics compared them with conditions during same period 2021. The objective was define Olympics. results indicated that: (1) average concentrations of PM2.5, PM10, NO2, CO, SO2 were 28.15, 29.16, 34.96, 9.06, 16.41%, respectively, lower than those Olympics; (2) five pollutant showed following pattern: (DWO) < Paralympics Paralympics; (3) on opening day (4 February), pollutants both cities low. PM2.5 PM10 varied widely without substantial peaks daily maximum values 15.17 8.67 µg/m3, which 65.56 69.79% DWO, respectively; (4) clean days DWO accounted for 94.12 76.47% total days, 11.76 41.18% higher 2021; (5) each phase Zhangjiakou, NO2/SO2 PM2.5/SO2 exhibited a decrease followed by an increase. PM2.5/PM10 ratios 0.65 0.67, indicating that fine particulate matter main contributor DWO.

Language: Английский

Citations

26
Quantifying the pollution characteristics of chemical components in PM2.5 in the North China Plain, China: Spatiotemporal variation and health risk DOI

Yue Ke,

Honglei Wang, Zihao Wu

et al.

Atmospheric Environment, Journal Year: 2023, Volume and Issue: 307, P. 119860 - 119860

Published: May 19, 2023

Language: Английский

Citations

17
Particle composition, sources and evolution during the COVID-19 lockdown period in Chengdu, southwest China: Insights from single particle aerosol mass spectrometer data DOI Open Access
Junke Zhang, Huan Li, Luyao Chen

et al.

Atmospheric Environment, Journal Year: 2021, Volume and Issue: 268, P. 118844 - 118844

Published: Nov. 9, 2021

Language: Английский

Citations

31
Wintertime investigation of PM10 concentrations, sources, and relationship with different meteorological parameters DOI Creative Commons

Bahadar Zeb,

Allah Ditta, Khan Alam

et al.

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Jan. 2, 2024

Abstract Meteorological factors play a crucial role in affecting air quality the urban environment. Peshawar is capital city of Khyber Pakhtunkhwa province Pakistan and pollution hotspot. Sources PM 10 influence meteorological on this megacity have yet to be studied. The current study aims investigate mass concentration levels composition, identify sources, quantify links between various parameters like temperature, relative humidity (RH), wind speed (WS), rainfall (RF) during winter months from December 2017 February 2018. concentrations vary 180 – 1071 µg m −3 , with mean value 586 ± 217 . highest observed December, followed by January February. average values carbonaceous species (i.e., total carbon, organic elemental carbon) are 102.41, 91.56, 6.72 μgm respectively. Water-soluble ions adhere following order: Ca 2+ > Na + K NH 4 Mg Twenty-four elements (Al, Si, S, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Zn, Ga, Ge, As, Se, Kr, Ag, Pb, Cu, Cd) detected PIXE analysis. Five sources based Positive Matrix Factorization (PMF) modeling include industrial emissions, soil re-suspended dust, household combustion, metallurgic industries, vehicular emission. A positive relationship temperature (r = 0.46 r 0.56, respectively). negative correlation recorded WS − 0.27) RF 0.46). This study’s results motivate routine monitoring owing high region. For purpose, establishment stations highly suggested for both meteorology. Air standards legislation need revised implemented. Moreover, development effective control strategies suggested.

Language: Английский

Citations

4
One-Year Real-Time Measurement of Black Carbon in the Rural Area of Qingdao, Northeastern China: Seasonal Variations, Meteorological Effects, and the COVID-19 Case Analysis DOI Creative Commons

Shijie Cui,

Jiukun Xian,

Fuzhen Shen

et al.

Atmosphere, Journal Year: 2021, Volume and Issue: 12(3), P. 394 - 394

Published: March 18, 2021

In this paper, we report the results obtained from one year of real-time measurement (i.e., December 2019 to November 2020) atmospheric black carbon (BC) under a rural environment in Qingdao Northeastern China. The annual average concentration BC was 1.92 ± 1.89 μg m−3. highest observed winter (3.65 2.66 m−3), followed by fall (1.73 1.33 spring (1.53 and summer (0.83 0.56 m−3). A clear weekend effect winter, which characterized higher (4.60 2.86 m−3) during rather than that (3.22 2.45 weekdays. influence meteorological parameters, including surface horizontal wind speed, boundary layer height (BLH), precipitation, on BC, investigated. particular, such BLH presented evidently seasonal dependence, while there no significant seasonality for speed. These may reflect different roles vertical dilution affecting seasons. △BC/△CO ratio decreased with increase indicative below-cloud wet removal especially summertime where rainfall events more frequently occurred any other bivariate-polar-plot analysis showed high concentrations were mainly associated low speed all seasons, highlighting an important source originated local emissions. By using concentration-weighted trajectory analysis, it found regional transports, northeastern could not be negligible contributing pollution Qingdao. coronavirus disease (COVID−19) case obvious BC/NO2 COVID-19 lockdown, supporting non-traffic sector (such as residential coal combustion)

Language: Английский

Citations

27