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dc.contributor.authorEscudero, Miguel
dc.contributor.authorSegers, Arjo
dc.contributor.authorKranenburg, Richard
dc.contributor.authorQuerol, Xavier
dc.contributor.authorAlastuey, Andrés
dc.contributor.authorBorge, Rafael
dc.contributor.authorDe la Paz, David
dc.contributor.authorGangoiti Bengoa, Gotzon ORCID
dc.contributor.authorSchaap, Martijn
dc.identifier.citationAtmospheric Chemistry and Physics 19(22) : 14211-14232 (2019)es_ES
dc.description.abstractTropospheric O-3 remains a major air-quality issue in the Mediterranean region. The combination of large anthropogenic emissions of precursors, transboundary contributions, a warm and dry aestival climate, and topographical features results in severe cases of photochemical pollution. Chemical transport models (CTMs) are essential tools for studying O-3 dynamics and for assessing mitigation measures, but they need to be evaluated specifically for each air basin. In this study, we present an optimisation of the LOTOS-EUROS CTM for the Madrid air basin. Five configurations using different meteorological datasets (from the European Centre for Medium-Range Weather Forecast, ECMWF; and the Weather Research and Forecasting Model, WRF), horizontal resolution and number of vertical levels were compared for July 2016. LOTOS-EUROS responded satisfactorily in the five configurations reproducing observations of surface O-3 with notable correlation and reduced bias and errors. However, the best-fit simulations for surface O-3 were obtained by increasing spatial resolution and using a large number of vertical levels to reproduce vertical transport phenomena and the formation of reservoir layers. Using the optimal configuration obtained in the evaluation, three characteristic events have been described: recirculation (REC) episodes and northern and southern advection (NAD and SAD, respectively) events. REC events were found to produce the highest O-3 due to the reduced ventilation associated with low wind speeds and the contribution of reservoir layers formed by vertical transport of O-3 formed near the surface in the previous days of the event. NAD events, usually associated with higher wind speeds, present the lowest ground-level O-3 concentrations in the region. During SAD episodes, external contributions along with low wind speeds allow O-3 to increase considerably but not as much as in REC events because steady southerly winds disperse local emissions and hinder the formation of reservoir layers.es_ES
dc.description.sponsorshipThis research has been supported by the Ministry of Economy, Industry and Competitiveness of Spain and FEDER (grant no. CGL2016-78594-R); the Department of Research, Innovation and University of the Aragon Regional Government and the European Social Fund (grant no. E23_17D); the Directorate General for Universities and Research of the Greater Madrid Region (grant no. S2013/MAE-2972); and the Ministry of Education and Science of Spain (grant no. CAS17/00108).es_ES
dc.subjectsurface ozone concentrationses_ES
dc.subjectwestern mediterranean basines_ES
dc.subjectquality modelses_ES
dc.subjectsource apportionmentes_ES
dc.subjectparticulate matteres_ES
dc.subjecttropospheric ozonees_ES
dc.subjecteuropean citieses_ES
dc.titleAnalysis of summer O3 in the Madrid air basin with the LOTOS-EUROS chemical transport modeles_ES
dc.rights.holderAuthor(s) 2019. This work is distributed underthe Creative Commons Attribution 4.0 Licensees_ES
dc.rights.holderAtribución 3.0 España*
dc.departamentoesIngeniería química y del medio ambientees_ES
dc.departamentoeuIngeniaritza kimikoa eta ingurumenaren ingeniaritzaes_ES

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Author(s) 2019. This work is distributed underthe Creative Commons Attribution 4.0 License
Except where otherwise noted, this item's license is described as Author(s) 2019. This work is distributed underthe Creative Commons Attribution 4.0 License