Changes in outdoor air pollution due to COVID-19 lockdowns differ by pollutant: evidence from Scotland

doi:10.1136/oemed-2020-106659

	Changes in outdoor air pollution due to COVID-19 lockdowns differ by pollutant: evidence from Scotland
	Dobson, Ruaraidh; Semple, Sean
	2020-11
发表期刊	OCCUPATIONAL AND ENVIRONMENTAL MEDICINE
ISSN	1351-0711
EISSN	1470-7926
摘要	Objectives To examine the impact of COVID-19 lockdown restrictions in March/April 2020 on concentrations of nitrogen dioxide (NO2) and ambient fine particulate matter (PM2.5) air pollution measured at roadside monitors across Scotland by comparing data with previous years. Methods Publicly available data of PM2.5 concentrations from reference monitoring systems at sites across Scotland were extracted for the 31-day period immediately following the imposition of lockdown rules on 23 March 2020. Similar data for 2017, 2018 and 2019 were gathered for comparison. Mean period values were calculated from the hourly data and logged values compared using pairwise t-tests. Weather effects were corrected using meteorological normalisation. Results NO2 concentrations were significantly lower in the 2020 lockdown period than in the previous 3 years (p<0.001). Mean outdoor PM2.5 concentrations in 2020 were much lower than during the same period in 2019 (p<0.001). However, despite UK motor vehicle journeys reducing by 65%, concentrations in 2020 were within 1 mu g/m(3) of those measured in 2017 (p=0.66) and 2018 (p<0.001), suggesting that traffic-related emissions may not explain variability of PM2.5 in outdoor air in Scotland. Conclusions The impact of reductions in motor vehicle journeys during COVID-19 lockdown restrictions may not have reduced ambient PM2.5 concentrations in some countries. There is also a need for work to better understand how movement restrictions may have impacted personal exposure to air pollutants generated within indoor environments.
关键词	particulates air pollution indoor air
DOI	10.1136/oemed-2020-106659
WOS研究方向	Public, Environmental & Occupational Health
WOS类目	Public, Environmental & Occupational Health
出版者	BMJ PUBLISHING GROUP
引用统计
文献类型	期刊论文
专题	新冠肺炎循证社会科学证据集成
作者单位	Univ Stirling
推荐引用方式 GB/T 7714	Dobson, Ruaraidh,Semple, Sean. Changes in outdoor air pollution due to COVID-19 lockdowns differ by pollutant: evidence from Scotland[J]. OCCUPATIONAL AND ENVIRONMENTAL MEDICINE,2020.
APA	Dobson, Ruaraidh,&Semple, Sean.(2020).Changes in outdoor air pollution due to COVID-19 lockdowns differ by pollutant: evidence from Scotland.OCCUPATIONAL AND ENVIRONMENTAL MEDICINE.
MLA	Dobson, Ruaraidh,et al."Changes in outdoor air pollution due to COVID-19 lockdowns differ by pollutant: evidence from Scotland".OCCUPATIONAL AND ENVIRONMENTAL MEDICINE (2020).

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Dobson-2020-Changes （392KB）	期刊论文	出版稿	开放获取	CC BY-NC-SA	浏览下载