Lockdown for CoViD-2019 in Milan: What are the effects on air quality?
Lockdown for CoViD-2019 in Milan: What are the effects on air quality?
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DOI：
10.1016/j.scitotenv.2020.139280
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发表时间：
2020-08-25
影响因子：
9.8
通讯作者：
Miino, Marco Carnevale
中科院分区：
文献类型：
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作者：
Collivignarelli, Maria Cristina;Abba, Alessandro;Miino, Marco Carnevale
基于CoViD-2019的迅速传播，政府宣布在整个北方意大利实施封锁。越来越严格的遏制措施的应用减少了CoViD-2019大流行对意大利国家卫生系统的影响，但与此同时，这些限制措施也为以前所未有的方式评估人类活动对空气污染物的影响提供了机会。本文旨在研究部分和全部封锁（PL和TL，分别）对米兰大都市空气质量的影响。因此，PL和随后的TL之后的人员流动的严重限制决定了主要由于车辆交通（PM10，PM2.5，BC，苯，CO和NOx）的污染物浓度的显着降低。封锁导致仅米兰市的二氧化硫明显下降，而邻近地区的二氧化硫则维持不变。尽管在TL中NO2的显着减少，O-3表现出显着的增加，可能是由于轻微的NO浓度。在米兰和SaA的增加更加突出，可能是由于米兰苯的平均浓度高于邻近地区，这可能促进了O-3的形成，以更显着的方式。
Based on the rapid spread of the CoViD-2019, a lockdown was declared in the whole Northern Italy by the Government. The application of increasingly rigorous containment measures allowed to reduce the impact of the CoViD-2019 pandemic on the Italian National Health System but at the same time these restriction measures gave also the opportunity to assess the effect of anthropogenic activities on air pollutants in an unprecedented way. This paper aims to study the impact of the partial and total lockdown (PL and TL, respectively) on air quality in the Metropolitan City of Milan. As results, the severe limitation of people movements following the PL and the subsequent TL determined a significant reduction of pollutants concentration mainly due to vehicular traffic (PM10, PM2.5, BC, benzene, CO, and NOx). The lockdown led to an appreciable drop in SO2 only in the city of Milan while it remained unchanged in the adjacent areas. Despite the significant decrease in NO2 in the TL, the O-3 exhibited a significant increase, probably, due to the minor NO concentration. In Milan and SaA the increase was more accentuated, probably, due to the higher average concentrations of benzene in Milan than the adjacent areas that might have promoted the formation of O-3 in a more significant way.