Environmental perspective of COVID-19

The Science of The Total Environment, Год журнала: 2020, Номер 728, С. 138870 - 138870

Опубликована: Апрель 22, 2020

Язык: Английский

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Impact of COVID-19 pandemic on socio-economic, energy-environment and transport sector globally and sustainable development goal (SDG)

Journal of Cleaner Production, Год журнала: 2021, Номер 312, С. 127705 - 127705

Опубликована: Май 31, 2021

Язык: Английский

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The global impacts of COVID-19 lockdowns on urban air pollution

Elementa Science of the Anthropocene, Год журнала: 2021, Номер 9(1)

Опубликована: Янв. 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.

Язык: Английский

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Early spring near-surface ozone in Europe during the COVID-19 shutdown: Meteorological effects outweigh emission changes

The Science of The Total Environment, Год журнала: 2020, Номер 747, С. 141322 - 141322

Опубликована: Июль 28, 2020

Язык: Английский

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Spatial and temporal changes of the ozone sensitivity in China based on satellite and ground-based observations

Atmospheric chemistry and physics, Год журнала: 2021, Номер 21(9), С. 7253 - 7269

Опубликована: Май 12, 2021

Abstract. Ground-level ozone (O3) pollution has been steadily getting worse in most parts of eastern China during the past 5 years. The non-linearity O3 formation with its precursors like nitrogen oxides (NOx= NO + NO2) and volatile organic compounds (VOCs) are complicating effective abatement plans. diagnosis from space-based observations, i.e. ratio formaldehyde (HCHO) columns to tropospheric NO2 (HCHO / NO2), previously proved be highly consistent our current understanding surface chemistry. HCHO thresholds distinguishing sensitivity depend on regions chemistry interactions aerosol. To shed more light over China, we have derived by directly connecting satellite-based observations ground-based measurements major Chinese cities this study. We find that a VOC-limited regime occurs for < 2.3, NOx-limited > 4.2. between 2.3 4.2 reflects transition two regimes. Our method shows tends urban areas rural remote China. there is shift some transitional associated rapid drop anthropogenic NOx emissions, owing widely applied rigorous emission control strategies 2016 2019. This detected spatial expansion supported rising concentrations. enhanced concentrations COVID-19 lockdown indicate protocol simultaneous emissions VOC controls essential

Язык: Английский

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COVID‐19 Crisis Reduces Free Tropospheric Ozone Across the Northern Hemisphere

Geophysical Research Letters, Год журнала: 2021, Номер 48(5)

Опубликована: Фев. 10, 2021

Abstract Throughout spring and summer 2020, ozone stations in the northern extratropics recorded unusually low free troposphere. From April to August, from 1 8 kilometers altitude, was on average 7% (≈4 nmol/mol) below 2000–2020 climatological mean. Such ozone, over several months, at so many stations, has not been observed any previous year since least 2000. Atmospheric composition analyses Copernicus Atmosphere Monitoring Service simulations NASA GMI model indicate that large 2020 springtime depletion Arctic stratosphere contributed less than one‐quarter of tropospheric anomaly. The anomaly is consistent with recent chemistry‐climate simulations, which assume emissions reductions similar those caused by COVID‐19 crisis. related appear be major cause for reduced 2020.

Язык: Английский

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Air quality changes in cities during the COVID-19 lockdown: A critical review

Atmospheric Research, Год журнала: 2021, Номер 264, С. 105823 - 105823

Опубликована: Авг. 25, 2021

Язык: Английский

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Global Changes in Secondary Atmospheric Pollutants During the 2020 COVID‐19 Pandemic

Journal of Geophysical Research Atmospheres, Год журнала: 2021, Номер 126(8)

Опубликована: Апрель 15, 2021

Abstract We use the global Community Earth System Model to investigate response of secondary pollutants (ozone O 3 , organic aerosols SOA) in different parts world modified emissions primary during COVID‐19 pandemic. quantify respective effects reductions NOx and volatile carbon (VOC) emissions, which, most cases, affect oxidants opposite ways. Using model simulations, we show that level has been reduced by typically 40% China February 2020 similar amounts many areas Europe North America mid‐March mid‐April 2020, good agreement with space surface observations. that, relative a situation which emission are ignored despite calculated increase hydroxyl peroxy radicals, ozone concentration increased only few NOx‐saturated regions (northern China, northern Europe, US) winter months pandemic when titration this molecule was reduced. In other regions, where is NOx‐controlled, decreased. SOA concentrations decrease concurrent reduction VOC emissions. The also shows atmospheric meteorological anomalies produced substantial variations chemical species for example, large fraction associated anomalies, while Plain, enhanced resulted primarily from pollutants.

Язык: Английский

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A review on methodology in O3-NOx-VOC sensitivity study

Environmental Pollution, Год журнала: 2021, Номер 291, С. 118249 - 118249

Опубликована: Сен. 29, 2021

Язык: Английский

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Effects of COVID-19 on the environment: An overview on air, water, wastewater, and solid waste

Journal of Environmental Management, Год журнала: 2021, Номер 292, С. 112694 - 112694

Опубликована: Апрель 30, 2021

Язык: Английский

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