A Comparative Study of Particulate Matter Between New Delhi, India and Riyadh, Saudi Arabia During the COVID-19 Lockdown Period DOI Creative Commons
Bhupendra Pratap Singh,

Gaber E. Eldesoky,

Pramod Kumar

et al.

Frontiers in Environmental Science, Journal Year: 2022, Volume and Issue: 9

Published: Jan. 14, 2022

Novel Coronavirus disease (COVID-19), after being identified in late December 2019 Wuhan city of China, spread very fast and has affected all the countries world. The impact lockdowns on particulate matter during lockdown period needs attention to explore correlation between anthropogenic natural emissions. current study demonstrated changes fine PM 2.5 , 10 their effect air quality lockdown. before was low New Delhi (India) Riyadh (Saudi Arabia), among major cities worldwide. India is influenced by dust sand from desert surrounding areas. Thus, becomes important analyse Indian sub-continent as impacted storms long distances. result indicated a significant reduction 93.24 37.89 μg/m 3 176.55 98.87 compared pre period, respectively. shows that average concentrations have declined -44% -59% Delhi. value median calculated at 33.71 for Riyadh, which lower than same period. values were different periods indicating considerable influence quality, especially concentration both (sand storms) sources periods. However, relatively smaller gains improvement correlated imposition milder predominance factors over there. Air Quality Index (AQI) data showed be ‘satisfactory’ green category This attempts better understand short- long-term scope scaled up nationwide, this might helpful formulation pollution sustainable management policies future.

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
Global tropospheric ozone responses to reduced NO x emissions linked to the COVID-19 worldwide lockdowns DOI Creative Commons
Kazuyuki Miyazaki, K. W. Bowman, Takashi Sekiya

et al.

Science Advances, Journal Year: 2021, Volume and Issue: 7(24)

Published: June 9, 2021

Global ozone plunged during the COVID-19 pandemic: a glimpse into future benefits for air quality and climate.

Language: Английский

Citations

160
Air quality changes in cities during the COVID-19 lockdown: A critical review DOI Open Access
Max G. Adam, Phuong Thi Minh Tran, Rajasekhar Balasubramanian

et al.

Atmospheric Research, Journal Year: 2021, Volume and Issue: 264, P. 105823 - 105823

Published: Aug. 25, 2021

Language: Английский

Citations

135
Air Pollution, Climate Change, and Human Health in Indian Cities: A Brief Review DOI Creative Commons
Rajveer Kaur, Puneeta Pandey

Frontiers in Sustainable Cities, Journal Year: 2021, Volume and Issue: 3

Published: Aug. 13, 2021

Climate change and air pollution have been a matter of serious concern all over the world in last few decades. The present review has carried out this Indian cities with significant impacts both climate on human health. expanding urban areas extreme events (high rainfall, temperature, floods, droughts) are posing health risks. intensified heat waves as result led to elevation temperature levels causing thermal discomfort several issues residents. study also covers increasing above prescribed standards for most megacities. aerosols PM concentrations explored hazardous particles that inhaled by humans enter respiratory system discussed. quality during COVID-2019 lockdown its reviewed. Finally, correlation between change, pollution, urbanizations presented pollutants (such aerosols) affect Earth directly (by absorption scattering) indirectly altering cloud properties radiation transfer processes). So, will serve baseline data policy makers analyzing vulnerable regions implementing mitigation plans tackling pollution. adaptation measures can be taken based reciprocate regular monitoring addressing well.

Language: Английский

Citations

127
How does government attention matter in air pollution control? Evidence from government annual reports DOI
Rui Bao, Tianle Liu

Resources Conservation and Recycling, Journal Year: 2022, Volume and Issue: 185, P. 106435 - 106435

Published: June 23, 2022

Language: Английский

Citations

121
Air quality during three covid-19 lockdown phases: AQI, PM2.5 and NO2 assessment in cities with more than 1 million inhabitants DOI Open Access
Abdelfettah Benchrif, Ali Wheida, Mounia Tahri

et al.

Sustainable Cities and Society, Journal Year: 2021, Volume and Issue: 74, P. 103170 - 103170

Published: July 14, 2021

Language: Английский

Citations

111
COVID-19, the Built Environment, and Health DOI Creative Commons
Howard Frumkin

Environmental Health Perspectives, Journal Year: 2021, Volume and Issue: 129(7)

Published: July 1, 2021

Since the dawn of cities, built environment has both affected infectious disease transmission and evolved in response to diseases. COVID-19 illustrates dynamics. The pandemic presented an opportunity implement health promotion prevention strategies numerous elements environment.This commentary aims identify features that affect risk as well with implications for (and, therefore, long-term public health).Built factors include crowding, poverty, racism (as they manifest housing neighborhood features), poor indoor air circulation, ambient pollution. Potential changes building design, increased teleworking, reconfigured streets, changing modes travel, provision parks greenspace, population shifts out urban centers. Although it is too early predict confidence which these responses may persist, identifying monitoring them can help professionals, architects, planners, decision makers, members public, optimize healthy environments during after recovery from pandemic. https://doi.org/10.1289/EHP8888.

Language: Английский

Citations

104
Temporal and spatial analysis of COVID-19 transmission in China and its influencing factors DOI Creative Commons
Qian Wang, Wen Dong, Kun Yang

et al.

International Journal of Infectious Diseases, Journal Year: 2021, Volume and Issue: 105, P. 675 - 685

Published: March 10, 2021

ObjectivesThe purpose of this study was to explore the temporal and spatial characteristics COVID-19 transmission its influencing factors in China, from January October 2020.MethodsAbout 81,000 confirmed case data, Baidu migration index air pollutants, meteorological government response strictness data were collected 31 provincial-level regions (excluding Hong Kong, Macao, Taiwan) 337 prefecture-level cities. The spatio-temporal explored using autocorrelation, hot spot, scanning statistics. At same time, Spearman rank correlation analysis multiple linear regression used relationship between cases.ResultsThe distribution China tends be stable over with prominent clustering regions. Spatio-temporal showed that most high-incidence months March at beginning epidemic, area highest aggregation risk Hubei Province (RR = 491.57) which 491.57 times other Among variables, daily average temperature, wind speed, precipitation, new cases negatively correlated. pollution concentration positively correlated cases, strict strongly cases.ConclusionsEnvironmental temperature has a certain inhibitory effect on COVID-19; have promoting COVID-19. indicates greater intensity intervention, fewer will occur.

Language: Английский

Citations

94
Clean energy substitution: The effect of transitioning from coal to gas on air pollution DOI
Jingjing Zeng, Rui Bao, Michael J. McFarland

et al.

Energy Economics, Journal Year: 2022, Volume and Issue: 107, P. 105816 - 105816

Published: Jan. 30, 2022

Language: Английский

Citations

68
Air quality index variation before and after the onset of COVID-19 pandemic: a comprehensive study on 87 capital, industrial and polluted cities of the world DOI Creative Commons
Mohammad Sarmadi, Sajjad Rahimi, Mina Rezaei

et al.

Environmental Sciences Europe, Journal Year: 2021, Volume and Issue: 33(1)

Published: Dec. 1, 2021

Coronavirus disease 2019 (COVID-19) pandemic provided an opportunity for the environment to reduce ambient pollution despite economic, social and health disruption world. The purpose of this study was investigate changes in air quality indexes (AQI) industrial, densely populated capital cities different countries world before after 2020. In ecological study, we used AQI obtained from free available databases such as World Air Quality Index (WAQI). Bivariate correlation analysis explore correlations between meteorological variables. Mean differences (standard deviation: SD) parameters years were tested using paired-sample

Language: Английский

Citations

62