干旱区生态环境知识资源中心(Arid): Air Quality in the Italian Northwestern Alps during Year 2020: Assessment of the COVID-19 Lockdown Effect from Multi-Technique Observations and Models

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DOI	10.3390/atmos12081006
	Air Quality in the Italian Northwestern Alps during Year 2020: Assessment of the COVID-19 Lockdown Effect from Multi-Technique Observations and Models
	Diemoz, Henri; Magri, Tiziana; Pession, Giordano; Tarricone, Claudia; Tombolato, Ivan Karl Friedrich; Fasano, Gabriele; Zublena, Manuela
通讯作者	Diemoz, H (corresponding author), Reg Environm Protect Agcy ARPA, I-11020 St Christophe, Italy.
来源期刊	ATMOSPHERE
EISSN	2073-4433
出版年	2021
卷号	12 期号:8
英文摘要	The effect of COVID-19 confinement regulations on air quality in the northwestern Alps is assessed here based on measurements at five valley sites in different environmental contexts. Surface concentrations of nitrogen oxides (NO and NO2), ozone (O-3), particulate matter (PM2.5 and PM10), together with a thorough microphysical (size), chemical, and optical (light absorption) aerosol characterisation, complemented by observations along the vertical column are considered. Even in the relatively pristine environment of the Alps, the lockdown effect is well discernible, both in the early confinement phase and in late 2020. The variations observed during the first confinement period in the city of Aosta (-61% NO, -43% NO2, +5% O-3, +9% PM2.5, -12% PM10, relative to average 2015-2019 conditions) are attributed to the competing effects of air pollution lockdown-induced changes (-74%, -52%, +18%, -13%, -27%, relative to the counterfactual scenario for 2020 provided by a predictive statistical model trained on past measurements) and meteorology (+52%, +18%, -11%, +25%, +20%, relative to average conditions). These changes agree well with the ones obtained from a chemical transport model with modified emissions according to the restrictions. With regard to column-integrated quantities and vertical profiles, the NO2 column density decreases by >20% due to the lockdown, whereas tropospheric aerosols are mainly influenced by large-scale dynamics (transport of secondary particles from the Po basin and mineral dust from the Sahara desert and the Caspian Sea), except a shallow layer about 500 m thick close to the surface, possibly sensitive to curtailed emissions (especially exhaust and non-exhaust particles from road traffic and fugitive emissions from the industry).
英文关键词	COVID-19 air quality nitrogen oxides ozone aerosol source apportionment aerosol profiles models Alps Italy
类型	Article
语种	英语
开放获取类型	Green Submitted, gold
收录类别	SCI-E
WOS记录号	WOS:000688858600001
WOS关键词	VALLEY AEROSOL POLLUTION ; CARBONACEOUS AEROSOLS ; LIGHT-ABSORPTION ; NITROGEN-DIOXIDE ; SKY RADIOMETER ; BLACK CARBON ; WATER-VAPOR ; URBAN AREA ; TRANSPORT ; IMPACT
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362636
作者单位	[Diemoz, Henri; Magri, Tiziana; Pession, Giordano; Tarricone, Claudia; Tombolato, Ivan Karl Friedrich; Fasano, Gabriele; Zublena, Manuela] Reg Environm Protect Agcy ARPA, I-11020 St Christophe, Italy; [Fasano, Gabriele] Sapienza Univ Rome, Dept Phys, I-00185 Rome, Italy
推荐引用方式 GB/T 7714	Diemoz, Henri,Magri, Tiziana,Pession, Giordano,et al. Air Quality in the Italian Northwestern Alps during Year 2020: Assessment of the COVID-19 Lockdown Effect from Multi-Technique Observations and Models[J],2021,12(8).
APA	Diemoz, Henri.,Magri, Tiziana.,Pession, Giordano.,Tarricone, Claudia.,Tombolato, Ivan Karl Friedrich.,...&Zublena, Manuela.(2021).Air Quality in the Italian Northwestern Alps during Year 2020: Assessment of the COVID-19 Lockdown Effect from Multi-Technique Observations and Models.ATMOSPHERE,12(8).
MLA	Diemoz, Henri,et al."Air Quality in the Italian Northwestern Alps during Year 2020: Assessment of the COVID-19 Lockdown Effect from Multi-Technique Observations and Models".ATMOSPHERE 12.8(2021).