Impact of lockdown measures to combat Covid-19 on air quality over western Europe
Impact of lockdown measures to combat Covid-19 on air quality over western Europe
复制标题
DOI：
10.1016/j.scitotenv.2020.140426
复制
发表时间：
2020-11-01
影响因子：
9.8
通讯作者：
Cholakian, Arineh
中科院分区：
文献类型：
--
作者：
Menut, Laurent;Bessagnet, Bertrand;Cholakian, Arineh
最近基于观察的研究显示，欧洲各国为遏制新型冠状病毒疫情而采取的封锁措施对空气质量产生了影响。然而，这些研究往往局限于比较没有和有封锁措施的情况，这些情况对应于不同的时间段，然后是不同的气象条件。我们建议在2020年3月使用WRF-CHIMERE建模套件进行建模研究，这种方法允许在没有气象条件偏差的情况下比较有和没有锁定措施的大气成分。这项研究表明，对大气成分的锁定效应，特别是通过大规模的交通减少，对几种短寿命的大气痕量物种非常重要，NO2浓度大幅降低，颗粒物（PM）浓度降低，由于非线性化学效应，对臭氧浓度的影响减轻。(c)2020年，任作家。由爱思唯尔公司出版。这是一篇开放获取的文章，获得了CC BY-NC-ND许可证（http：//creativecommons.org/licenses/by-nc-nd/4.0/）。
Recent studies based on observations have shown the impact of lockdown measures taken in various European countries to contain the Covid-19 pandemic on air quality. However, these studies are often limited to compare situations without and with lockdown measures, which correspond to different time periods and then under different meteorological conditions. We propose a modelling study with the WRF-CHIMERE modelling suite for March 2020, an approach allowing to compare atmospheric composition with and without lockdown measures without the biases of meteorological conditions. This study shows that the lockdown effect on atmospheric composition, in particular through massive traffic reductions, has been important for several short-lived atmospheric trace species, with a large reduction in NO2 concentrations, a lower reduction in Particulate Matter (PM) concentrations and a mitigated effect on ozone concentrations due to non-linear chemical effects. (c) 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).