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  1. Article ; Online: Changes in air quality during COVID-19 'lockdown' in the United Kingdom.

    Jephcote, Calvin / Hansell, Anna L / Adams, Kathryn / Gulliver, John

    Environmental pollution (Barking, Essex : 1987)

    2020  Volume 272, Page(s) 116011

    Abstract: ... and transport). In this study, we quantified changes to air quality across the United Kingdom from 30 ... The UK implemented a lockdown in Spring (2020) to curtail the person-to-person transmission ...

    Abstract The UK implemented a lockdown in Spring (2020) to curtail the person-to-person transmission of the SARS-CoV-2 virus. Measures restricted movements to one outing per day for exercise and shopping, otherwise most people were restricted to their dwelling except for key workers (e.g. medical, supermarkets, and transport). In this study, we quantified changes to air quality across the United Kingdom from 30/03/2020 to 03/05/2020 (weeks 14-18), the period of most stringent travel restrictions. Daily pollutant measurements of NO
    MeSH term(s) Air Pollutants/analysis ; Air Pollution/analysis ; COVID-19 ; Communicable Disease Control ; Environmental Monitoring ; Humans ; Particulate Matter/analysis ; SARS-CoV-2 ; United Kingdom
    Chemical Substances Air Pollutants ; Particulate Matter
    Language English
    Publishing date 2020-11-20
    Publishing country England
    Document type Journal Article
    ZDB-ID 280652-6
    ISSN 1873-6424 ; 0013-9327 ; 0269-7491
    ISSN (online) 1873-6424
    ISSN 0013-9327 ; 0269-7491
    DOI 10.1016/j.envpol.2020.116011
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Changes in air quality during COVID-19lockdown’ in the United Kingdom

    Jephcote, Calvin / Hansell, Anna L / Adams, Kathryn / Gulliver, John

    Environmental pollution. 2021 Mar. 01, v. 272

    2021  

    Abstract: ... and transport). In this study, we quantified changes to air quality across the United Kingdom from 30 ... anthropogenic activities were estimated under the observed meteorological conditions. During the lockdown study period ... compared with measurements over the same period during 2017–19. Comparisons were also made with predicted ...

    Abstract The UK implemented a lockdown in Spring (2020) to curtail the person-to-person transmission of the SARS-CoV-2 virus. Measures restricted movements to one outing per day for exercise and shopping, otherwise most people were restricted to their dwelling except for key workers (e.g. medical, supermarkets, and transport). In this study, we quantified changes to air quality across the United Kingdom from 30/03/2020 to 03/05/2020 (weeks 14–18), the period of most stringent travel restrictions. Daily pollutant measurements of NO₂, O₃ and PM₂.₅ from the national network of monitoring sites during this period were compared with measurements over the same period during 2017–19. Comparisons were also made with predicted concentrations for the 2020 period from business-as-usual (BAU) modelling, where the contributions of normal anthropogenic activities were estimated under the observed meteorological conditions. During the lockdown study period there was a 69% reduction in traffic overall (74% reduction in light and 35% in heavy vehicles). Measurements from 129 monitoring stations, identified mean reductions in NO₂ of 38.3% (−8.8 μg/m³) and PM₂.₅ of 16.5% (−2.2 μg/m³). Improvements in NO₂ and PM₂.₅ were largest at urban traffic sites and more modest at background locations where a large proportion of the population live. In contrast, O₃ concentrations on average increased by 7.6% (+4.8 μg/m³) with the largest increases at roadside sites due to reductions in local emissions of NO. A lack of VOC monitoring limited our capacity to interpret changes in O₃ at urban background locations. BAU models predicted comparable NO₂ reductions and O₃ gains, although PM₂.₅ episodes would have been more prominent without lockdown. Results demonstrate the relatively modest contribution of traffic to air quality, suggesting that sustained improvements in air quality require actions across various sectors, including working with international and European initiatives on long-range transport air pollutants, especially PM₂.₅ and O₃.
    Keywords COVID-19 infection ; Severe acute respiratory syndrome coronavirus 2 ; air ; air quality ; exercise ; people ; roadsides ; traffic ; travel ; viruses ; United Kingdom
    Language English
    Dates of publication 2021-0301
    Publishing place Elsevier Ltd
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 280652-6
    ISSN 1873-6424 ; 0013-9327 ; 0269-7491
    ISSN (online) 1873-6424
    ISSN 0013-9327 ; 0269-7491
    DOI 10.1016/j.envpol.2020.116011
    Database NAL-Catalogue (AGRICOLA)

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  3. Article ; Online: Changes in air quality during COVID-19lockdown’ in the United Kingdom()

    Jephcote, Calvin / Hansell, Anna L. / Adams, Kathryn / Gulliver, John

    Environ Pollut

    Abstract: ... and transport). In this study, we quantified changes to air quality across the United Kingdom from 30 ... anthropogenic activities were estimated under the observed meteorological conditions. During the lockdown study period ... compared with measurements over the same period during 2017-19. Comparisons were also made with predicted ...

    Abstract The UK implemented a lockdown in Spring 2020 to curtail the person-to-person transmission of the SARS-CoV-2 virus. Measures restricted movements to one outing per day for exercise and shopping and otherwise most people were restricted to their dwelling except for key workers (e.g. medical, supermarkets, and transport). In this study, we quantified changes to air quality across the United Kingdom from 30(th) March to 3(rd) May 2020 (weeks 14-18), the period of most stringent travel restrictions. Daily pollutant measurements of NO(2), O(3) and PM(2.5) from the national network of monitoring sites during this period were compared with measurements over the same period during 2017-19. Comparisons were also made with predicted concentrations for the 2020 period from business-as-usual (BAU) modelling, where the contributions of normal anthropogenic activities were estimated under the observed meteorological conditions. During the lockdown study period there was a 69% reduction in traffic overall (74% reduction in light and 35% in heavy vehicles). Measurements from 129 monitoring stations, identified mean reductions in NO(2) of 38.3% (-8.8 μg/m(3)) and PM(2.5) of 16.5% (-2.2 μg/m(3)). Improvements in NO(2) and PM(2.5) were largest at urban traffic sites and more modest at background locations where a large proportion of the population live. In contrast, O(3) concentrations on average increased by 7.6% (+4.8 μg/m(3)) with the largest increases at roadside sites due to reductions in local emissions of NO. A lack of VOC monitoring limited our capacity to interpret changes in O(3) at urban background locations. BAU models predicted comparable NO(2) reductions and O(3) gains, although PM(2.5) episodes would have been more prominent without lockdown. Results demonstrate the relatively modest contribution of traffic to air quality, suggesting that sustained improvements in air quality require actions across various sectors, including working with international and European initiatives on long-range transport air pollutants, especially PM(2.5) and O(3).
    Keywords covid19
    Publisher Elsevier; PMC
    Document type Article ; Online
    DOI 10.1016/j.envpol.2020.116011
    Database COVID19

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