Impact of COVID-19 lockdown on particulate matter (PM2.5) concentration in Kathmandu, Nepal

被引：2

作者：

Mishra A. ^{[1
]}

Pant B.P. ^{[1
]}

Shakya S. ^{[2
]}

Tiwari P. ^{[3
]}

Pandit D. ^{[1
]}

Poudyal K.N. ^{[4
]}

机构：

[1] Department of Physics, St. Xavier’s College, Kathmandu

[2] GITAM Institute of Science, GITAM University, Visakhapatnam

[3] Centre for Water and Atmospheric Research, Kathmandu Institute of Applied Science, Kathmandu

[4] Institute of Engineering, Pulchowk Campus, Lalitpur

来源：

International Journal of Environmental Studies | 2022年 / 79卷 / 06期

关键词：

air pollution; COVID-19; Kathmandu; lockdown; PM[!sub]2.5[!/sub;

D O I：

10.1080/00207233.2021.1974757

中图分类号：

学科分类号：

摘要：

This paper reports a study on the statistics for particulate matter pollution (PM2.5) and the COVID-19 lockdown in the Kathmandu valley. The PM2.5 decreased during the COVID-19 pandemic lockdown periods 2020 compared to the average value of the previous three years (2017, 2018, and 2019). Further, analysis of active fire and air mass trajectory for April and May in 2019 and 2020 shows that the particulate matter trend associated with Kathmandu is not directly influenced by the long-range transport of wind carrying aerosols from the active fire regions. Statistical tests indicate a reduction of particulate matter pollution during the period. © 2021 Informa UK Limited, trading as Taylor & Francis Group.

引用

页码：1048 / 1056

页数：8

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