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dc.creatorOtmani, Anas
dc.creatorBenchrif, Abdelfettah
dc.creatorTahri, Mounia
dc.creatorBounakhla, Moussa
dc.creatorChakir, El Mahjoub
dc.creatorEl Bouch, Mohammed
dc.creatorKrombi, M'hamed
dc.date.accessioned2020-07-15T16:59:31Z
dc.date.available2020-07-15T16:59:31Z
dc.date.created2020
dc.identifier.issn0048-9697spa
dc.identifier.otherhttps://doi.org/10.1016/j.scitotenv.2020.139541spa
dc.identifier.urihttp://hdl.handle.net/20.500.12010/10566
dc.description.abstractCovid-19 was first reported in Morocco on March 2, 2020. Since then, to prevent its propagation, the Moroccan government declared a state of health emergency. A set of rapid and strict countermeasures have taken, including locking down cities, limiting population's mobility and prohibiting almost all avoidable activities. In the present study, we attempted to evaluate the changes in levels of some air pollutants (mainly PM10, NO2 and SO2) in Salé city (North-Western Morocco) during the lockdown measures. In this context, a continuous measurement of PM10, SO2 and NO2 was carried before and during the Covid-19 lockdown period. As a consequence of the security measures and control actions undertaken, the emissions from vehicle exhaust and industrial production were significantly reduced, which contribute to the decrease in the concentrations of the studied pollutants. The obtained results showed that the difference between the concentrations recorded before and during the lockdown period were respectively 75%, 49% and 96% for PM10, SO2 and NO2. PM10 levels were much less reduced than NO2. The three-dimensional air mass backward trajectories, using the HYSPLIT model, demonstrated the benefits of PM10 local emission reductions related to the lockdown were overwhelmed by the contribution of long-range transported aerosols outside areas. In addition, noteworthy differences in the air mass back trajectories and the meteorology between these two periods were evidenced.spa
dc.format.extent5 páginasspa
dc.format.mimetypeimage/jepgspa
dc.publisherScience Directeng
dc.sourcereponame:Expeditio Repositorio Institucional UJTLspa
dc.sourceinstname:Universidad de Bogotá Jorge Tadeo Lozanospa
dc.subjectCovid-19spa
dc.subjectPM10spa
dc.subjectNO2spa
dc.subjectSO2spa
dc.subjectLockdownspa
dc.subjectMoroccospa
dc.titleImpact of Covid-19 lockdown on PM10, SO2 and NO2 concentrations in Salé City (Morocco)spa
dc.type.localArtículospa
dc.subject.lembSíndrome respiratorio agudo gravespa
dc.subject.lembCOVID-19spa
dc.subject.lembSARS-CoV-2spa
dc.subject.lembCoronavirusspa
dc.rights.accessrightsinfo:eu-repo/semantics/openAccessspa
dc.type.hasversioninfo:eu-repo/semantics/acceptedVersionspa
dc.identifier.doihttps://doi.org/10.1016/j.scitotenv.2020.139541spa


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