Nitrogen oxides and ozone in Portugal: trends and ozone estimation in an urban and a rural site

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dc.contributor.authorFernández-Guisuraga, José Manuel
dc.contributor.authorCastro Izquierdo, Amaya
dc.contributor.authorAlves, Célia
dc.contributor.authorCalvo Gordaliza, Ana Isabel
dc.contributor.authorAlonso Blanco, Elisabeth
dc.contributor.authorBlanco Alegre, Carlos
dc.contributor.authorRocha, Alfredo
dc.contributor.authorFraile Laiz, Roberto
dc.date.accessioned2026-01-13T22:57:40Z
dc.date.available2026-01-13T22:57:40Z
dc.date.issued2016-05-24
dc.description.abstractThis study provides an analysis of the spatial distribution and trends of NO, NO2 and O3 concentrations in Portugal between 1995 and 2010. Furthermore, an estimation model for daily ozone concentrations was developed for an urban and a rural site. NO concentration showed a significant decreasing trend in most urban stations. A decreasing trend in NO2 is only observed in the stations with less influence from emissions of primary NO2. Several stations showed a significant upward trend in O3 as a result of the decrease in the NO/NO2 ratio. In the northern rural region, ozone showed a strong correlation with wind direction, highlighting the importance of long-range transport. In the urban site, most of the variance is explained by the NO2/NOX ratio. The results obtained by the ozone estimation model in the urban site fit 2013 observed data. In the rural site, the estimated ozone during extreme events agrees with observed concentration.es_ES
dc.description.sponsorshipThe authors wish to thank the Agência Portuguesa do Ambiente (QualAr) for providing pollutants data and Dr. Claire Thomas at Transvalor S.A. for providing solar radiation data series. This study was partially supported by the Spanish Ministerio de Economía y Competitividad (Grants TEC2014-57821-R and CGL2014-52556-R), by FEDER funds through the Programa Operacional Factores de Competitividade (COMPETE) and by Portuguese national funds through Fundação para a Ciência e a Tecnologia (FCT), within the frame work of the CLICURB project BUrban Atmospheric Quality, Climate Change and Resilience^ EXCL/AAGMAA/0383/2012. The University of León has also partially supported this study through the Programa Propio 2015. E. Alonso-Blanco acknowledges the FPI grant to carry out the doctoral thesis/PhD at the Research Centre for Energy,Environment and Technology (CIEMAT).es_ES
dc.identifier.citationFernández-Guisuraga, J.M., Castro, A., Alves, C. et al. Nitrogen oxides and ozone in Portugal: trends and ozone estimation in an urban and a rural site. Environ Sci Pollut Res 23, 17171–17182 (2016). https://doi.org/10.1007/s11356-016-6888-6es_ES
dc.identifier.issn0944-1344
dc.identifier.urihttps://hdl.handle.net/20.500.14855/5478
dc.language.isoenges_ES
dc.publisherEnvironmental Science and Pollution Researches_ES
dc.rights.accessRightsopen accesses_ES
dc.subjectGeneralized linear modeles_ES
dc.subjectNitrogen oxideses_ES
dc.subjectOzonees_ES
dc.subjectPortugales_ES
dc.subjectRural backgroundes_ES
dc.subjectUrban traffices_ES
dc.titleNitrogen oxides and ozone in Portugal: trends and ozone estimation in an urban and a rural sitees_ES
dc.typejournal articlees_ES
dc.type.hasVersionVoRes_ES

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