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研究（因新冠疫情实施的）封锁措施对环境气溶胶（PM）的影响：以印度恒河平原（IGP）城市为例的一项研究。

Examining the impact of lockdown (due to COVID-19) on ambient aerosols (PM): A study on Indo-Gangetic Plain (IGP) Cities, India.

作者信息

Das Manob, Das Arijit, Sarkar Raju, Saha Sunil, Mandal Ashis

机构信息

Department of Geography, University of Gour Banga, Malda, 732103 West Bengal India.

Department of Civil Engineering, Delhi Technological University, Bawana Road, Delhi, 110 042 India.

出版信息

Stoch Environ Res Risk Assess. 2021;35(6):1301-1317. doi: 10.1007/s00477-020-01905-x. Epub 2020 Oct 16.

DOI:10.1007/s00477-020-01905-x
PMID:33100900
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7567422/
Abstract

The outbreak of COVID-19 pandemic has impacted all the aspects of environment. The numbers of COVID-19 cases and deaths are increasing across the globe. In many countries lockdown has been imposed at local, regional as well as national level to combat with this global pandemic that caused the improvement of air quality. In India also lockdown was imposed on 25th March, 2020 and it was further extended in different phases. The lockdown due to outbreak of COVID-19 pandemic has showed substantial reduction of PM concentrations across the cities of India. The present study aims to assess concentration of PM across 12 cities located in different spatial segments Indo-Gangetic Plain (IGP). The result showed that there was substantial decrease of PM concentrations across the cities located in IGP after implementation of lockdown. Before 30 days of lockdown, average PM across cities was 65.77 µg/m that reached to 42.72 µg/m during lockdown periods (decreased by 35%). Maximum decrease of PM concentrations has been documented in Lower Gangetic Plain (LGP) cities (57%) followed by Middle Gangetic Plain (MGP) cities (34%) and Upper Gangetic Plain (UGP) cities (27%) respectively. Among all the cities of IGP, maximum decrease of PM concentrations was recorded in Kolkata (64%) (LGP) followed by Muzaffarpur (53%) (MGP), Asansol (51%) (LGP), Patna (43%) (MGP) and Varanasi (33%) (MGP).Therefore, this study has an immense potentiality to understand the impact of lockdown on a physical region (Ganga River Basin) and it may be also helpful for planners and policy makers to implement effective measures at regional level to control air pollution.

摘要

新冠疫情的爆发影响了环境的各个方面。全球新冠病例和死亡人数都在增加。许多国家在地方、区域和国家层面实施了封锁措施，以抗击这场导致空气质量改善的全球大流行。印度也于2020年3月25日实施了封锁，并在不同阶段进一步延长。由于新冠疫情爆发而实施的封锁使印度各城市的细颗粒物（PM）浓度大幅降低。本研究旨在评估印度恒河平原（IGP）不同空间区域的12个城市的PM浓度。结果表明，实施封锁后，IGP各城市的PM浓度大幅下降。封锁前30天，各城市的平均PM为65.77微克/立方米，在封锁期间降至42.72微克/立方米（下降了35%）。细颗粒物浓度下降最多的是恒河下游平原（LGP）城市（57%），其次是恒河中游平原（MGP）城市（34%）和恒河上游平原（UGP）城市（27%）。在IGP的所有城市中，细颗粒物浓度下降最多的是加尔各答（64%）（LGP），其次是穆扎法尔布尔（53%）（MGP）、阿桑索尔（51%）（LGP）、巴特那（43%）（MGP）和瓦拉纳西（33%）（MGP）。因此，本研究对于了解封锁对一个自然区域（恒河流域）的影响具有巨大潜力，也可能有助于规划者和政策制定者在区域层面实施有效措施来控制空气污染。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ccb4/7567422/c6ce1232c386/477_2020_1905_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ccb4/7567422/abaa3f03fca7/477_2020_1905_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ccb4/7567422/58c8ee8d4db1/477_2020_1905_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ccb4/7567422/4b9997e90ded/477_2020_1905_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ccb4/7567422/f2f8d6e07f87/477_2020_1905_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ccb4/7567422/9d086f5cbf5f/477_2020_1905_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ccb4/7567422/794b416acad1/477_2020_1905_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ccb4/7567422/9add15206113/477_2020_1905_Fig12_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ccb4/7567422/7bc9668b5620/477_2020_1905_Fig13_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ccb4/7567422/9e638994209e/477_2020_1905_Fig14_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ccb4/7567422/8acc34247169/477_2020_1905_Fig15_HTML.jpg
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