气候变化领域集成服务门户(CCPortal): PM10 variation, composition, and source analysis in Tuscany (Italy) following the COVID-19 lockdown restrictions

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DOI	10.5194/acp-22-9987-2022
	PM10 variation, composition, and source analysis in Tuscany (Italy) following the COVID-19 lockdown restrictions
	Giardi, Fabio; Nava, Silvia; Calzolai, Giulia; Pazzi, Giulia; Chiari, Massimo; Faggi, Andrea; Andreini, Bianca Patrizia; Collaveri, Chiara; Franchi, Elena; Nincheri, Guido; Amore, Alessandra; Becagli, Silvia; Severi, Mirko; Traversi, Rita; Lucarelli, Franco
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	9987
结束页码	10005
卷号	22 期号:15 页码:19
英文摘要	To control the spread of COVID-19, exceptional restrictive measures were taken in March 2020 that imposed a radical change on the lifestyle of millions of citizens around the world, albeit for a short period. The national lockdown, which lasted from 10 March to 18 May 2020 in Italy, was a unique opportunity to observe the variation in air quality in urban environments under conditions comprising almost total traffic restriction and a strong reduction in work activities. In this paper, the data from 17 urban monitoring sites in Tuscany are presented, and the PM and NO2 concentrations in the 2 months before the start of the lockdown and the 2 months after lockdown are compared with the corresponding months of the previous 3 years. The results show that the total loads of PM2.5 and PM10 (particulate matter with an aerodynamic diameter smaller than 2.5 and 10 mu m, respectively) decreased, but they did not exhibit significant changes compared to previous years, whereas NO2 underwent a drastic reduction. For three of these sites, the chemical composition of the collected samples was measured using thermal-optical techniques, ion chromatography, and particle-induced X-ray emission analysis, and the application of multivariate positive matrix factorization analysis also allowed for PM10 source identification and apportionment. Using these analyses, it was possible to explain the low sensitivity of PM10 to the lockdown effects as being due to different, sometimes inverse, behaviors of the different sources that contribute to PM. The results clearly indicate a decline in pollution levels related to urban traffic and an increase in the concentration of sulfate for all sites during the lockdown period.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000835747100001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273777
作者单位	University of Florence; Gran Sasso Science Institute (GSSI); Istituto Nazionale di Fisica Nucleare (INFN); Regional Environmental Protection Agency - Italy; Regional Environmental Protection Agency - Italy; University of Florence
推荐引用方式 GB/T 7714	Giardi, Fabio,Nava, Silvia,Calzolai, Giulia,et al. PM10 variation, composition, and source analysis in Tuscany (Italy) following the COVID-19 lockdown restrictions[J],2022,22(15):19.
APA	Giardi, Fabio.,Nava, Silvia.,Calzolai, Giulia.,Pazzi, Giulia.,Chiari, Massimo.,...&Lucarelli, Franco.(2022).PM10 variation, composition, and source analysis in Tuscany (Italy) following the COVID-19 lockdown restrictions.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(15),19.
MLA	Giardi, Fabio,et al."PM10 variation, composition, and source analysis in Tuscany (Italy) following the COVID-19 lockdown restrictions".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.15(2022):19.