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http://w3id.org/ro-id/rohub/model#subject/951739604 http://www.w3.org/2004/02/skos/core#prefLabel fied ozone pollution https://orcid.org/0000-0002-2736-0052 http://schema.org/email federica.foglini@ismar.cnr.it https://orcid.org/0000-0002-2736-0052 http://schema.org/name Federica Foglini https://orcid.org/0000-0002-2736-0052 http://www.w3.org/1999/02/22-rdf-syntax-ns#type http://xmlns.com/foaf/0.1/Agent https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/#enrichment_service-account-enrichment http://schema.org/name service-account-enrichment https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/#enrichment_service-account-enrichment http://www.w3.org/1999/02/22-rdf-syntax-ns#type http://xmlns.com/foaf/0.1/Agent https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/ http://schema.org/about http://eurovoc.europa.eu/632 https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/ http://schema.org/author https://orcid.org/0000-0002-2736-0052 https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/ http://schema.org/contentSize 5965 https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/ http://schema.org/contentUrl https://api.rohub.org/api/ros/49f56f03-89b6-4956-880b-182aa3d41992/crate/download/ https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/ http://schema.org/creator mailto:service-account-generation-service https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/ http://schema.org/dateCreated 2021-12-10 09:58:55.698529+00:00 https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/ http://schema.org/dateModified 2025-03-05 00:46:16.654410+00:00 https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/ http://schema.org/datePublished 2021-12-10 09:58:55.698529+00:00 https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/ http://schema.org/description The effect of lockdown due to coronavirus disease (COVID-19) pandemic on air pollution in four Southern European cities (Nice, Rome, Valencia and Turin) and Wuhan (China) was quantified, with a focus on ozone (O-3). Compared to the same period in 20172019, the daily O-3 mean concentrations increased at urban stations by 24% in Nice, 14% in Rome, 27% in Turin, 2.4% in Valencia and 36% in Wuhan during the lockdown in 2020. This increase in O-3 concentrations is mainly explained by an unprecedented reduction in NOx emissions leading to a lower O-3 titration by NO. Strong reductions in NO2 mean concentrations were observed in all European cities, similar to 53% at urban stations, comparable to Wuhan (57%), and similar to 65% at traffic stations. NO declined even further, similar to 63% at urban stations and similar to 78% at traffic stations in Europe. Reductions in PM2.5 and PM10 at urban stations were overall much smaller both in magnitude and relative change in Europe (similar to 8%) than in Wuhan (similar to 42%). The PM reductions due to limiting transportation and fuel combustion in institutional and commercial buildings were partly offset by increases of PM emissions from the activities at home in some of the cities. The NOx concentrations during the lockdown were on average 49% lower than those at weekends of the previous years in all cities. The lockdown effect on O-3 production was similar to 10% higher than the weekend effect in Southern Europe and 38% higher in Wuhan, while for PM the lockdown had the same effect as weekends in Southern Europe (similar to 6% of difference). This study highlights the challenge of reducing the formation of secondary pollutants such as O-3 even with strict measures to control primary pollutant emissions. These results are relevant for designing abatement policies of urban pollution. https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/ http://schema.org/encodingFormat application/ld+json https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/ http://schema.org/hasPart https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/resources/7c888cef-1ba0-4783-a3a8-f8774d35b3cb https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/ http://schema.org/identifier https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992 https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/ http://schema.org/license https://choosealicense.com/no-permission/ https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/ http://schema.org/name Ampli fied ozone pollution in cities during the COVID-19 lockdown https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/ http://w3id.org/ro-id/rohub/model#creation_mode MANUAL https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/ http://www.w3.org/1999/02/22-rdf-syntax-ns#type http://purl.org/wf4ever/ro#ResearchObject https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/ http://www.w3.org/1999/02/22-rdf-syntax-ns#type http://purl.org/wf4ever/roevo#LiveRO https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/ http://www.w3.org/1999/02/22-rdf-syntax-ns#type http://schema.org/Dataset https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/ http://www.w3.org/1999/02/22-rdf-syntax-ns#type http://w3id.org/ro/earth-science#BibliographyResearchObject https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/ http://www.w3.org/1999/02/22-rdf-syntax-ns#type https://w3id.org/ro/terms/earth-science#BibliographyResearchObject https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/ https://www.w3.org/ns/iana/link-relations/relation#cite-as Foglini, Federica. "Ampli fied ozone pollution in cities during the COVID-19 lockdown." ROHub. Dec 10 ,2021. https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992. https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/resources/7c888cef-1ba0-4783-a3a8-f8774d35b3cb http://schema.org/author mailto:service-account-generation-service https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/resources/7c888cef-1ba0-4783-a3a8-f8774d35b3cb http://schema.org/contentSize 207 https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/resources/7c888cef-1ba0-4783-a3a8-f8774d35b3cb http://schema.org/contentUrl https://api.rohub.org/api/resources/7c888cef-1ba0-4783-a3a8-f8774d35b3cb/download/ https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/resources/7c888cef-1ba0-4783-a3a8-f8774d35b3cb http://schema.org/creator mailto:service-account-generation-service https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/resources/7c888cef-1ba0-4783-a3a8-f8774d35b3cb http://schema.org/dateCreated 2021-12-10 09:58:58.521856+00:00 https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/resources/7c888cef-1ba0-4783-a3a8-f8774d35b3cb http://schema.org/dateModified 2021-12-10 09:58:58.522896+00:00 https://w3id.org/ro-id/49f56f03-89b6-4956-880b-182aa3d41992/resources/7c888cef-1ba0-4783-a3a8-f8774d35b3cb http://schema.org/description The effect of lockdown due to coronavirus disease (COVID-19) pandemic on air pollution in four Southern European cities (Nice, Rome, Valencia and Turin) and Wuhan (China) was quantified, with a focus on ozone (O-3). Compared to the same period in 20172019, the daily O-3 mean concentrations increased at urban stations by 24% in Nice, 14% in Rome, 27% in Turin, 2.4% in Valencia and 36% in Wuhan during the lockdown in 2020. This increase in O-3 concentrations is mainly explained by an unprecedented reduction in NOx emissions leading to a lower O-3 titration by NO. Strong reductions in NO2 mean concentrations were observed in all European cities, similar to 53% at urban stations, comparable to Wuhan (57%), and similar to 65% at traffic stations. NO declined even further, similar to 63% at urban stations and similar to 78% at traffic stations in Europe. Reductions in PM2.5 and PM10 at urban stations were overall much smaller both in magnitude and relative change in Europe (similar to 8%) than in Wuhan (similar to 42%). The PM reductions due to limiting transportation and fuel combustion in institutional and commercial buildings were partly offset by increases of PM emissions from the activities at home in some of the cities. The NOx concentrations during the lockdown were on average 49% lower than those at weekends of the previous years in all cities. The lockdown effect on O-3 production was similar to 10% higher than the weekend effect in Southern Europe and 38% higher in Wuhan, while for PM the lockdown had the same effect as weekends in Southern Europe (similar to 6% of difference). This study highlights the challenge of reducing the formation of secondary pollutants such as O-3 even with strict measures to control primary pollutant emissions. 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