Variation of Aerosol Pollution in Peru during the Quarantine Due to COVID-19

Román-Gonzalez, Avid; Vargas-Cuentas, Natalia I.

doi:10.14569/ijacsa.2020.0110407

Cited by 8 publications

(6 citation statements)

References 6 publications

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“…As shown in Table , NO concentrations fell by 35% and 60% on weekdays and weekends, respectively, in Northern California and by 32% and 20% on weekdays and weekends, respectively, in Southern California. Our results agree with previous COVID-19-related studies that have reported NO 2 emission reductions in California. − Outside of California, studies around the world have also found a consistent decline in NO 2 concentrations. − While traffic reductions of this scale are historically unprecedented, other smaller scale natural experiments that disrupt automobile traffic, such as a major highway closure, major sporting events, − and odd–even license plate traffic policies, have produced similar declines in direction and magnitude in air pollution following declines in traffic. Our results confirm and reinforce the relationship between traffic and mobile source pollution.…”

Section: Results and Discussionsupporting

confidence: 89%

“…As the COVID-19 pandemic spread, human activity halted under shelter-in-place measures. Many studies in China, − India, − Europe, − South America, − Central Asia, and the United States ,− have used satellite and stationary monitoring to demonstrate decreases in regional PM 2.5 and NO 2 levels during shelter-in-place periods. While satellite data are widely available across the world, this approach has a few limitations.…”

Section: Introductionmentioning

confidence: 99%

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Decreases in Near-Road NO and NO₂ Concentrations during the COVID-19 Pandemic in California

Liu

Lipsitt

Jerrett

et al. 2020

Environ. Sci. Technol. Lett.

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The COVID-19 pandemic and resulting shelter-in-place measures led to widespread adoption of remote work policies and temporary business closures or operation curtailments, disrupting typical commuting patterns. This study investigates how these sudden shifts in traffic patterns affected near-road NO and NO2 concentrations in California. We used (1) near-road air pollution data from the U.S. Environmental Protection Agency’s AirNow database, (2) passenger and heavy-duty traffic data from the Caltrans Performance Monitoring System, and (3) weather data from MesoWest between January 1 and April 30 during the years 2017–2020 to model NO and NO2 concentrations as functions of highway traffic and meteorology. We then simulated NO and NO2 under business-as-usual traffic conditions and compared modeled data to observed values. Weekday passenger traffic significantly declined in Northern and Southern California by 29% and 24%, respectively. As a result, Northern and Southern California near-road locations experienced statistically significant declines in NO concentrations of 35% and 32% and in NO2 concentrations of 15% and 29%, respectively, compared to modeled estimates. As a natural experiment, our findings demonstrate that reduced vehicle activity significantly improved air quality, contributing to the body of evidence linking shelter-in-place measures and cleaner air.

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Section: Results and Discussionsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Decreases in Near-Road NO and NO₂ Concentrations during the COVID-19 Pandemic in California

Liu

Lipsitt

Jerrett

et al. 2020

Environ. Sci. Technol. Lett.

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“…For the time being, the Sentinel-5P satellite provides global and timely measurements of atmospheric composition ( de Vries et al, 2011 ; Berger and Aschbacher, 2012 ; Veefkind et al, 2012 ; Theys et al, 2017 ) and several studies have demonstrated its usability in this context. For instance, Sharma et al (2020) in a study looking into the air quality of 22 cities in India during the COVID-19 found that the effect of restricted human activities led to a reduction of PM 2.5 in most of the regions and Roman-Gonzalez and Vargas-Cuentas (2020) report reduction of aerosol pollution over Lima, Peru and the Amazon regions based on Sentinel-5P data. In Asia numerous studies report lower NO 2 concentrations during the pandemic based on Sentinel-5P data (e.g.…”

Section: Introductionmentioning

confidence: 99%

Air quality development during the COVID-19 pandemic over a medium-sized urban area in Thailand

Stratoulias

Nuthammachot

2020

Science of The Total Environment

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The COVID-19 pandemic has triggered an industrial and financial slowdown due to unprecedented regulations imposed with the purpose to contain the spread of the virus. Consequently, the positive effect on the environment has been witnessed. One of the most prominent evidences has been the drastic air quality improvement, as a direct consequence of lower emissions from reduced industrial activity. While several studies have demonstrated the validity of this hypothesis in mega-cities worldwide, it is still an unsubstantiated fact whether the same holds true for cities with a smaller urban extent and population. In the present study we investigate the temporal development of atmospheric constituent concentrations as retrieved concurrently from the Sentinel-5P satellite and a ground meteorological station. We focus on the period before and during the COVID-19 pandemic over the city of Hat Yai, Thailand and present the effect of the lockdown on the atmospheric quality over this average populated city (156,000 inhabitants). NO 2 , PM 2.5 and PM 10 concentrations decreased by 33.7%, 21.8% and 22.9% respectively in the first 3 weeks of the lockdown compared to the respective pre-lockdown period; O 3 also decreased by 12.5% and contrary to similar studies. Monthly averages of NO 2 , CO and PM 2.5 for the month April exhibit in 2020 the lowest values in the last decade. Sentinel-5P retrieved NO 2 tropospheric concentrations, both locally over the ground station and the spatial average over the urban extent of the city, are in agreement with the reduction observed from the ground station. Numerous studies have already presented evidence of the bettering of the air quality over large metropolitan areas during the COVID-19 pandemic. In the current study we demonstrate that this holds true for Hat Yai, Thailand; we propound that the environmental benefits documented in major urban agglomerations during the lockdown may extend to medium-sized urban areas as well.

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“…Similarly, Roman-Gonzalez and Vargas-Cuentas (2020) studied the air quality in Peru using data that was collected by the European Space Agency (particularly, Sentinel-5 Precursor satellite). A decrease in the aerosol contaminations was noticed in multiple areas in Peru, essentially in the Amazon and Lima zones.…”

Section: Covid-19 Impact On Countriesmentioning

confidence: 99%

Effect of COVID-19 on air quality and pollution in different countries

Albayati

Waisi

Al-Furaiji

et al. 2021

Journal of Transport & Health

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Introduction COVID-19 is a pandemic that affected humans’ lives and activities through the year 2020 in a way that was not witnessed in recent years. Many governments declared a complete lockdown as a try to stop the transmission of the disease. This lockdown resulted in a good recovery in environmental health, where air pollutants levels dramatically decreased. Theory There are two relations between air pollution and COVID-19, one is before the disease spread, and the other is after. Before the disease spread, many areas had high levels of contaminants in the air due to industrial activities, transportation, and human density. These areas had the highest infection rates and death cases. This could be attributed to two reasons, the aerosol could help to spread the virus at a higher rate, and air pollutants could negatively affect peoples’ lungs, which assisted the virus in attacking the patients brutally. Results After the disease spread, the lockdown that was applied in the major industrial countries led to a decrease in the pollutants levels and an increase in the ozone level in the air. This lockdown improved the air quality worldwide to a level that all political conferences and agreements could not reach. In this review, we are showing the impact of COVID-19 on air pollutants in different countries. Summary This paper provides information about pollutants' influence on human and environmental health that other researchers obtained in different areas of the globe before and after the pandemic. This could give ideas about the impact of humans on the environment and the possible ways of recovering the environment's health.

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Variation of Aerosol Pollution in Peru during the Quarantine Due to COVID-19

Cited by 8 publications

References 6 publications

Decreases in Near-Road NO and NO₂ Concentrations during the COVID-19 Pandemic in California

Decreases in Near-Road NO and NO₂ Concentrations during the COVID-19 Pandemic in California

Air quality development during the COVID-19 pandemic over a medium-sized urban area in Thailand

Effect of COVID-19 on air quality and pollution in different countries

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Variation of Aerosol Pollution in Peru during the Quarantine Due to COVID-19

Cited by 8 publications

References 6 publications

Decreases in Near-Road NO and NO2 Concentrations during the COVID-19 Pandemic in California

Decreases in Near-Road NO and NO2 Concentrations during the COVID-19 Pandemic in California

Air quality development during the COVID-19 pandemic over a medium-sized urban area in Thailand

Effect of COVID-19 on air quality and pollution in different countries

Contact Info

Product

Resources

About

Decreases in Near-Road NO and NO₂ Concentrations during the COVID-19 Pandemic in California

Decreases in Near-Road NO and NO₂ Concentrations during the COVID-19 Pandemic in California