Comparison of Air Pollutants during the Two COVID-19 Lockdown Periods in Winter 2019 and Spring 2022 in Shanghai, China DOI Creative Commons
Yingxuan Li, Yanrong Yang, Leying Zhang

et al.

Atmosphere, Journal Year: 2024, Volume and Issue: 15(4), P. 443 - 443

Published: April 3, 2024

During the winter of 2019, global outbreak COVID-19 prompted extensive research on urban air pollution under lockdown measures. However, these studies predominantly focused conditions, thereby limiting investigations into changes in pollutants during other seasons that were also subject to restrictions. Shanghai, China, has undergone two periods seasons: 2019 and spring 2022. The seasonal variations human activities represented by meteorological factors nighttime light brightness this paper, respectively. reduction human-related emissions was estimated based targets outlined China’s Air Pollution Prevention Control Action Plan. results showed significant reductions NO2 PM particles periods, both accompanied a notable increase O3 concentration. In comparison lockdown, there an approximate 40% decrease PM2.5 concentrations spring, while concentration exhibited 48.81%. Furthermore, due shifting wind patterns lockdowns from high-pollution core areas shifted 20–25 km southeastward spring. considerable impact activities, whereas affected mostly change interactions among pollutants. Compared corresponding non-lockdown condition, CO decreased lockdown; however, it increased lockdown. different found have lower effect than caused nitrogen oxide (NO, NO2) concentrations. summary, more pronounced compared winter, underwent alterations.

Language: Английский

Two decades of air pollution: health impacts in the metropolitan area of Porto Alegre, Brazil DOI
Aline Neutzling Brum, Rodrigo de Lima Brum, Alícia da Silva Bonifácio

et al.

International Journal of Environmental Science and Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 9, 2025

Language: Английский

Citations

2
Chemical drivers of ozone change in extreme temperatures in eastern China DOI
Xue Meng,

Jiakui Jiang,

Tianshu Chen

et al.

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 874, P. 162424 - 162424

Published: March 1, 2023

Language: Английский

Citations

43
Estimation of near-surface ozone concentration and analysis of main weather situation in China based on machine learning model and Himawari-8 TOAR data DOI
Bin Chen,

Yixuan Wang,

Jianping Huang

et al.

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 864, P. 160928 - 160928

Published: Dec. 17, 2022

Language: Английский

Citations

41
Identify the key emission sources for mitigating ozone pollution: A case study of urban area in the Yangtze River Delta region, China DOI
Xin Zhang, Qiang Ma,

Wanghui Chu

et al.

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 892, P. 164703 - 164703

Published: June 7, 2023

Language: Английский

Citations

28
The air quality and well-being effects of low emission zones DOI Creative Commons
Luis Sarmiento, Nicole Wägner, Aleksandar Zaklan

et al.

Journal of Public Economics, Journal Year: 2023, Volume and Issue: 227, P. 105014 - 105014

Published: Oct. 25, 2023

This study provides the first evidence of subjective well-being impacts low emission zones (LEZs) while also undertaking a comprehensive analysis their air quality effects. We identify causal by exploiting zones' introduction date with difference-in-differences designs robust to staggered implementations and time-varying treatment Results show improvements through reductions in traffic-related pollutants despite ground-level ozone increases harmful spatial pollution spillovers. further find that cause transitory yet long-lasting individuals' life satisfaction health benefits, suggesting effects restricting mobility potentially outweigh those improved health.

Language: Английский

Citations

25
Reducing Soil-Emitted Nitrous Acid as a Feasible Strategy for Tackling Ozone Pollution DOI Creative Commons
Chaoyang Xue, Can Ye, Keding Lu

et al.

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(21), P. 9227 - 9235

Published: May 16, 2024

Severe ozone (O3) pollution has been a major air quality issue and affects environmental sustainability in China. Conventional mitigation strategies focusing on reducing volatile organic compounds nitrogen oxides (NOx) remain complex challenging. Here, through field flux measurements laboratory simulations, we observe substantial nitrous acid (HONO) emissions (FHONO) enhanced by fertilizer application at an agricultural site. The observed FHONO significantly improves model performance predicting atmospheric HONO leads to regional O3 increases 37%. We also demonstrate the significant potential of nitrification inhibitors reactive nitrogen, including NOx, as much 90%, well greenhouse gases like oxide up 60%. Our findings introduce feasible concept for mitigating pollution: soil emissions. Hence, this study important implications policy decisions related control climate change.

Language: Английский

Citations

11
Pop-up cycling infrastructure as a niche innovation for sustainable transportation in European cities: An inter- and transdisciplinary case study of Berlin DOI Creative Commons
Sophia Becker, Dirk von Schneidemesser, Alexandre Caseiro

et al.

Sustainable Cities and Society, Journal Year: 2022, Volume and Issue: 87, P. 104168 - 104168

Published: Sept. 9, 2022

Mobility behavior changes due to the COVID-19 pandemic have opened a window of opportunity for an accelerated transition towards sustainable mobility. Many European cities installed temporary cycling infrastructure which can be considered niche innovation in Multi-Level-Perspective transitions (Geels, 2002). We empirically assess effects such terms air quality, behaviour, and acceptance, with focus on city Berlin, Germany. The numerous pop-up bike lanes serve as inter- transdisciplinary case study systematically capture these effects. conducted survey among Berlin citizens (n= 1,661), analysed usage data, measured exposure cyclists quality before after implementation one lane during first wave COVID-19. Results show that receive high levels increase respective street, reduce cyclists' nitrogen dioxide. Their fosters innovative mind-set transport planning: temporarily try out new street designs, learn from practical experiences, improve then permanently implement ones best proven practice. conclude PUBL accelerate regime shift car-oriented bicycle-friendly because its many demonstrated positive impacts.

Language: Английский

Citations

31
HONO chemistry at a suburban site during the EXPLORE-YRD campaign in 2018: formation mechanisms and impacts on O3 production DOI Creative Commons
Can Ye, Keding Lu, Xuefei Ma

et al.

Atmospheric chemistry and physics, Journal Year: 2023, Volume and Issue: 23(24), P. 15455 - 15472

Published: Dec. 18, 2023

Abstract. HONO is an important precursor for OH radicals that impact secondary-pollutant production. However, there are still large uncertainties about different sources which hinder accurate predictions of concentration and hence atmospheric oxidation capacity. Here was measured during the EXPLORE-YRD campaign (EXPeriment on eLucidation Oxidation capacity aerosol foRmation their Effects in Yangtze River Delta), along with other parameters, enabling us to comprehensively investigate variation characteristics evaluate relative importance by using a box model. showed significant variations, ranging from several tens parts per thousand 4.4 ppb. The average diurnal pattern / NOx maximum 0.17 around noon resembled j(O1D), indicating existence photo-induced sources. Modeling simulations only default source (OH + NO) largely underestimated concentrations, modeled-averaged noontime order magnitude lower than observed concentration. calculated strength unknown (Punknown) nearly symmetrical profile 2.5 ppb h−1 noon. correlation analysis sensitivity tests NO2 conversion ground able explain Punknown. Additional incorporated into model improved model's performance simulating concentrations. revised reproduced nighttime well but daytime Further indicated underestimation not due uptake coefficients or surfaces enhancement factor nitrate photolysis more likely were considered Among gas-phase source, dominated modeled production daytime, accounting 71 % total, followed NO OH, hydrolysis surface, vehicle emissions, surface. surface major HONO, contributing 55 total contributed 43 ROx O3 (17 %), HCHO (14 ozonolysis alkenes (12 %) carbonyl (10 %). With as constraint, peak net ozone rate increased 88 12.6 compared without evidently enhanced aggravated pollution summer seasons. Our study emphasized heterogeneous parameterization predicting

Language: Английский

Citations

19
Impacts of net zero policies on air quality in a metropolitan area of the United Kingdom: Towards world health organization air quality guidelines DOI Creative Commons
Jian Zhong, James Robert Hodgson, William J. Bloss

et al.

Environmental Research, Journal Year: 2023, Volume and Issue: 236, P. 116704 - 116704

Published: July 20, 2023

Climate change and air pollution are closely interlinked since carbon dioxide pollutants co-emitted from fossil fuel combustion. Net Zero (NZ) policies aiming to reduce emissions will likely bring co-benefits in quality associated health. However, it is unknown whether regional NZ alone be sufficient pollutant levels meet the latest 2021 World Health Organisation (WHO) guidelines. Here, we carried out high resolution modelling for West Midlands region, a typical metropolitan area UK, quantify effects of different on quality. Results show that significantly improve Midlands, with up 6 μg m-3 (21%) reduction annual mean NO2 (mostly through electrification vehicle fleet, EV) 1.4 (12%) PM2.5 projected 2030 relative under "business as usual" (BAU) scenario. Under BAU, concentrations most wards would below 10 whilst scenario, those all m-3. This means ward averages UK m-3target decade early no ward-level-averaged PM2.concentrations WHO Air Quality guideline level 5 any Similarly only 18 (8% region's population) predicted have (10 m-3). Decarbonisation linked deliver substantial benefits, but not isolation clean low enough

Language: Английский

Citations

16
Impact of aerosol-boundary layer interactions on PM2.5 pollution during cold air pool events in a semi-arid urban basin DOI
Min Zhang, Pengfei Tian, Yiyang Zhao

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 922, P. 171225 - 171225

Published: Feb. 24, 2024

Language: Английский

Citations

6