Analysis of lockdown for CoViD-19 impact on NO2 in London, Milan and Paris: What lesson can be learnt?

Collivignarelli, Maria Cristina; Rose, Claudio De; Abbà, Alessandro; Baldi, Marco; Pedrazzani, Roberta; Sorlini, Sabrina; Miino, Marco Carnevale

doi:10.1016/j.psep.2020.12.029

Cited by 35 publications

(33 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Reductions in ambient concentrations of NO 2 were also observed when lockdowns were mandated in cities around the world as a response to the Covid-19 pandemic. For example, in London, Milan and Paris, the observed reductions in NO 2 concentrations during lockdown in 2020 compared to the same period for the years 2017-2019 were reported as 71.1-80.8%, 8.6-42.4%, and 65.7-79.8%, respectively (Collivignarelli et al, 2021). Similarly, concentrations of NO 2 in Madrid and Barcelona during lockdown (March 2020), were 56 and 59% lower respectively, compared to March 2019 (Baldasano, 2021).…”

Section: Covid-19 and Its Impact On Transportation And Nitrogen Dioxide Concentrationsmentioning

confidence: 95%

See 1 more Smart Citation

Nitrogen Dioxide, Greenhouse Gas Emissions and Transportation in Urban Areas: Lessons From the Covid-19 Pandemic

Restrepo

2021

Front. Environ. Sci.

View full text Add to dashboard Cite

Nitrogen dioxide (NO2) is a pollutant of concern in urban areas around the world. The main sources in urban environments are related to the burning of fuel and include transportation, electricity generation, and industrial and residential activities. From a public health perspective NO2 has also been widely associated with respiratory disease, including asthma exacerbation. NO2 also plays a key role in ground-level concentrations of ozone (O3), which is also a public health concern. This policy brief explores the relationships between transportation, climate change mitigation and ambient levels of air pollutants such as NO2. The Covid-19 pandemic has offered a glimpse of how rapid changes in transportation use can result in significant decreases in NO2 concentrations. Data from New York City supports this relationship. Transportation policies aimed at reducing traffic offer an opportunity to both mitigate greenhouse gas emissions and improve air quality. The implementation of measures to rethink public space and the use of streets in response to Covid-19 also provides insights into an additional policy alternative to achieve these goals.

show abstract

Section: Covid-19 and Its Impact On Transportation And Nitrogen Dioxide Concentrationsmentioning

confidence: 95%

“…Changes in the ambient concentration of NO 2 cannot be attributed only to changes in traffic and industrial activity. Weather can also impact how NO 2 disperses in an urban environment (Collivignarelli et al, 2021;Wong et al, 2021).…”

Section: Covid-19 and Its Impact On Transportation And Nitrogen Dioxide Concentrationsmentioning

confidence: 99%

Nitrogen Dioxide, Greenhouse Gas Emissions and Transportation in Urban Areas: Lessons From the Covid-19 Pandemic

Restrepo

2021

Front. Environ. Sci.

View full text Add to dashboard Cite

show abstract

“…Reductions in the atmospheric levels of criteria air pollutants, i.e., particulate matter (PM; PM 10 and PM 2.5 (PM with diameter ≤10 μm and ≤2.5 μm, respectively)), nitrogen dioxide (NO 2 ), carbon monoxide (CO), sulfur dioxide (SO 2 ), and ozone (O 3 ) have been reported in many cities during the lockdown, compared to pre-lockdown periods and/or previous years. The change in air quality was studied based on measurements of these criteria air pollutants at routine fixed monitoring stations and satellite-based observations ( Bao and Zhang, 2020 ; Collivignarelli et al, 2021 ; Dantas et al, 2020 ; Le et al, 2020 ; Rodríguez-Urrego and Rodríguez-Urrego, 2020 ; Sulaymon et al, 2021 ; Venter et al, 2020 ). Several cities, however, did not experience an obvious improvement in OAQ, with some of them even observing a worsening of the air quality.…”

Section: Introductionmentioning

confidence: 99%

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

Adam

Tran

Balasubramanian

2021

Atmospheric Research

100

View full text Add to dashboard Cite

In response to the rapid spread of coronavirus disease-2019 (COVID-19) within and across countries and the need to protect public health, governments worldwide introduced unprecedented measures such as restricted road and air travel and reduced human mobility in 2020. The curtailment of personal travel and economic activity provided a unique opportunity for researchers to assess the interplay between anthropogenic emissions of primary air pollutants, their physical transport, chemical transformation, ultimate fate and potential health impacts. In general, reductions in the atmospheric levels of outdoor air pollutants such as particulate matter (PM), nitrogen dioxide (NO 2 ), carbon monoxide (CO), sulfur dioxide (SO 2 ), and volatile organic compounds (VOCs) were observed in many countries during the lockdowns. However, the levels of ozone (O 3 ), a secondary air pollutant linked to asthma and respiratory ailments, and secondary PM were frequently reported to remain unchanged or even increase. An increase in O 3 can enhance the formation of secondary PM 2.5 , especially secondary organic aerosols, through the atmospheric oxidation of VOCs. Given that the gaseous precursors of O 3 (VOCs and NO x ) are also involved in the formation of secondary PM 2.5, an integrated control strategy should focus on reducing the emission of the common precursors for the co-mitigation of PM 2.5 and O 3 with an emphasis on their complex photochemical interactions. Compared to outdoor air quality, comprehensive investigations of indoor air quality (IAQ) are relatively sparse. People spend more than 80% of their time indoors with exposure to air pollutants of both outdoor and indoor origins. Consequently, an integrated assessment of exposure to air pollutants in both outdoor and indoor microenvironments is needed for effective urban air quality management and for mitigation of health risk. To provide further insights into air quality, we provide a critical review of scientific articles, published from January 2020 to December 2020 across the globe. Finally, we discuss policy implications of our review in the context of global air quality improvement.

show abstract

“…While these changes are most visible in cities and highly industrial areas, as shown for example by Collivignarelli et al ( 2021 ), who demonstrated that despite the lockdown restrictions large cities still exceeded NO 2 limits, this paper will examine if changes on a regional scale are detectable in Ireland. In addition to NO 2 , particulate matter (PM) and ozone (O 3 ) are investigated, as these both are related to NO 2 emissions.…”

Section: Introductionmentioning

confidence: 94%

Effect of COVID-19 lockdown on regional pollution in Ireland

Spohn

Martin

Geever

et al. 2021

Air Qual Atmos Health

View full text Add to dashboard Cite

This study examines the regional impact of the COVID-19 lockdown restrictions on pollution in Ireland by comparing the 2020 measurements of ozone (O3), nitrogen dioxide (NO2), and particulate matter (PM) from monitoring stations around the country to the previous 3-year average. Results indicate that O3 was 5.6% lower and 13.7% higher than previous years during the lockdown at rural and suburban sites, respectively. NO2 decreased by 50.7% in urban areas, but increased slightly in agricultural regions, consistent with satellite observations. PM concentrations did not change significantly compared to previous years; however, a reduction in the signal variability in the smaller size particle measurements may be the result of different emission sources. The reduction in NO2 likely increased the ratio of volatile organic compounds (VOCs) to NOx (nitrogen oxides), creating a NOx limited environment, which resulted in an initial increase in O3 in suburban areas, and the lower than usual levels observed at rural sites. Meteorology showed higher than average wind speeds prior to lockdown, which likely acted to disperse PM and NO2.

show abstract

Analysis of lockdown for CoViD-19 impact on NO2 in London, Milan and Paris: What lesson can be learnt?

Abstract: Graphical abstract

Cited by 35 publications

References 46 publications

Nitrogen Dioxide, Greenhouse Gas Emissions and Transportation in Urban Areas: Lessons From the Covid-19 Pandemic

Nitrogen Dioxide, Greenhouse Gas Emissions and Transportation in Urban Areas: Lessons From the Covid-19 Pandemic

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

Effect of COVID-19 lockdown on regional pollution in Ireland

Contact Info

Product

Resources

About