Changes in criteria air pollution levels in the US before, during, and after Covid-19 stay-at-home orders: Evidence from regulatory monitors

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 769, P. 144693 - 144693

Published: Jan. 2, 2021

Language: Английский

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Levels and sources of hourly PM2.5-related elements during the control period of the COVID-19 pandemic at a rural site between Beijing and Tianjin

The Science of The Total Environment, Journal Year: 2020, Volume and Issue: 744, P. 140840 - 140840

Published: July 9, 2020

Language: Английский

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The Climate Response to Emissions Reductions Due to COVID‐19: Initial Results From CovidMIP

Geophysical Research Letters, Journal Year: 2021, Volume and Issue: 48(8)

Published: March 11, 2021

Abstract Many nations responded to the corona virus disease‐2019 (COVID‐19) pandemic by restricting travel and other activities during 2020, resulting in temporarily reduced emissions of CO 2 , greenhouse gases ozone aerosol precursors. We present initial results from a coordinated Intercomparison, CovidMIP, Earth system model simulations which assess impact on climate these reductions. 12 models performed multiple initial‐condition ensembles produce over 300 spanning both condition structural uncertainty. find consensus amounts (particularly southern eastern Asia) associated increases surface shortwave radiation levels. However, any near‐surface temperature or rainfall 2020–2024 is extremely small not detectable this analysis. Regional analyses finer scale, closer attention extremes (especially linked changes atmospheric composition air quality) are required test COVID‐19‐related emission reductions near‐term climate.

Language: Английский

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Pre-to-post lockdown impact on air quality and the role of environmental factors in spreading the COVID-19 cases - a study from a worst-hit state of India

International Journal of Biometeorology, Journal Year: 2020, Volume and Issue: 65(2), P. 205 - 222

Published: Oct. 9, 2020

The present study aims to examine the changes in air quality during different phases of COVID-19 pandemic, including lockdown (LD1–4) and unlock period (UL1–2) (post-lockdown) as compared pre-lockdown (PL1–3) establish relationships environmental demographic variables with cases state Maharashtra, worst-hit India. Atmospheric pollutants such PM2.5, PM10, NOx, CO were substantially reduced greatest reduction cities having larger traffic volumes. Compared immediate (PL3), averaged PM2.5 PM10 by up 51% 47% respectively periods, which resulted 'satisfactory' level index (AQI) a result vehicular industrial closing. These parameters continued reduce much 80% periods due additive impact weather (rainfall temperature) combined conditions. Kendall's correlation matrix showed significant negative between temperature (r= − 0.35 057). Conversely, SO2 O3 did not improve, some cases, they increased unlocking. spreading incidences strongly positively correlated (r < 0.62) dew point 0.73). Thus, this indicates that increase cannot weaken transmission virus. number relative was negatively = 0.33 0.74), may be mere coincidence lockdown. However, based on data factors, it found particulate matter (PM2.5 PM10) population density are closely linked higher morbidity mortality although more in-depth research is required direction validate finding. onset has allowed us determine 'immediate' within densely populated/industrialized areas can improve livelihood pollution mitigation. findings could used policymakers set new benchmarks for would life major sectors World's population. shown we make when necessary, pave way future inform policy tough choices will have survival. Also, our results enrich ongoing discussion role factors help take necessary steps its control.

Language: Английский

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Impact of COVID-19 induced lockdown on land surface temperature, aerosol, and urban heat in Europe and North America

Sustainable Cities and Society, Journal Year: 2021, Volume and Issue: 75, P. 103336 - 103336

Published: Sept. 5, 2021

Language: Английский

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