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  1. Article ; Online: Assessing air quality changes in large cities during COVID-19 lockdowns: The impacts of traffic-free urban conditions in Almaty, Kazakhstan.

    Kerimray, Aiymgul / Baimatova, Nassiba / Ibragimova, Olga P / Bukenov, Bauyrzhan / Kenessov, Bulat / Plotitsyn, Pavel / Karaca, Ferhat

    The Science of the total environment

    2020  Volume 730, Page(s) 139179

    Abstract: Number of cities worlwide experienced air quality improvements during COVID-19 lockdowns ... 19 case was registered in Kazakhstan. This study aims to analyze the effect of the lockdown ... In Almaty, a city-scale quarantine came into force on March 19, 2020, which was a week after the first COVID ...

    Abstract Number of cities worlwide experienced air quality improvements during COVID-19 lockdowns; however, such changes may have been different in places with major contributions from nontraffic related sources. In Almaty, a city-scale quarantine came into force on March 19, 2020, which was a week after the first COVID-19 case was registered in Kazakhstan. This study aims to analyze the effect of the lockdown from March 19 to April 14, 2020 (27 days), on the concentrations of air pollutants in Almaty. Daily concentrations of PM
    MeSH term(s) Air Pollutants ; Air Pollution ; Betacoronavirus ; COVID-19 ; Cities ; Coronavirus Infections ; Environmental Monitoring ; Kazakhstan ; Pandemics ; Particulate Matter ; Pneumonia, Viral ; SARS-CoV-2
    Chemical Substances Air Pollutants ; Particulate Matter
    Keywords covid19
    Language English
    Publishing date 2020-05-04
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2020.139179
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Assessing air quality changes in large cities during COVID-19 lockdowns: The impacts of traffic-free urban conditions in Almaty, Kazakhstan

    Kerimray, Aiymgul / Baimatova, Nassiba / Ibragimova, Olga P / Bukenov, Bauyrzhan / Kenessov, Bulat / Plotitsyn, Pavel / Karaca, Ferhat

    Sci Total Environ

    Abstract: Number of cities worlwide experienced air quality improvements during COVID-19 lockdowns ... demonstrate the impact of traffic on the complex nature of air pollution in Almaty, which is substantially ... 19 case was registered in Kazakhstan. This study aims to analyze the effect of the lockdown ...

    Abstract Number of cities worlwide experienced air quality improvements during COVID-19 lockdowns; however, such changes may have been different in places with major contributions from nontraffic related sources. In Almaty, a city-scale quarantine came into force on March 19, 2020, which was a week after the first COVID-19 case was registered in Kazakhstan. This study aims to analyze the effect of the lockdown from March 19 to April 14, 2020 (27 days), on the concentrations of air pollutants in Almaty. Daily concentrations of PM2.5, NO2, SO2, CO, O3, and BTEX were compared between the periods before and during the lockdown. During the lockdown, the PM2.5 concentration was reduced by 21% with spatial variations of 6-34% compared to the average on the same days in 2018-2019, and still, it exceeded WHO daily limit values for 18 days. There were also substantial reductions in CO and NO2 concentrations by 49% and 35%, respectively, but an increase in O3 levels by 15% compared to the prior 17 days before the lockdown. The concentrations of benzene and toluene were 2-3 times higher than those during in the same seasons of 2015-2019. The temporal reductions may not be directly attributed to the lockdown due to favorable meteorological variations during the period, but the spatial effects of the quarantine on the pollution levels are evidenced. The results demonstrate the impact of traffic on the complex nature of air pollution in Almaty, which is substantially contributed by various nontraffic related sources, mainly coal-fired combined heat and power plants and household heating systems, as well as possible small irregular sources such as garbage burning and bathhouses.
    Keywords covid19
    Publisher WHO
    Document type Article
    Note WHO #Covidence: #165150
    Database COVID19

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  3. Article ; Online: Assessing air quality changes in large cities during COVID-19 lockdowns

    Kerimray, Aiymgul / Baimatova, Nassiba / Ibragimova, Olga P. / Bukenov, Bauyrzhan / Kenessov, Bulat / Plotitsyn, Pavel / Karaca, Ferhat

    Science of The Total Environment

    The impacts of traffic-free urban conditions in Almaty, Kazakhstan

    2020  Volume 730, Page(s) 139179

    Keywords Environmental Engineering ; Waste Management and Disposal ; Pollution ; Environmental Chemistry ; covid19
    Language English
    Publisher Elsevier BV
    Publishing country us
    Document type Article ; Online
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2020.139179
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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