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dc.contributor.authorRipoll, Annaes_ES
dc.contributor.authorMinguillón, María Cruzes_ES
dc.contributor.authorPey, Jorgees_ES
dc.contributor.authorGonzález Jiménez, José Luises_ES
dc.contributor.authorDay, Douglas A.es_ES
dc.contributor.authorSosedova, Yulia A.es_ES
dc.contributor.authorCanonaco, Francescoes_ES
dc.contributor.authorPrévǒt, André S Hes_ES
dc.contributor.authorQuerol, Xavieres_ES
dc.contributor.authorAlastuey, Andréses_ES
dc.identifier.citationAtmospheric Chemistry and Physicses_ES
dc.description.abstractReal-time measurements of inorganic (sulfate, nitrate, ammonium, chloride and black carbon (BC)) and organic submicron aerosols (particles with an aerodynamic diameter of less than 1 Î1/4m) from a continental background site (Montsec, MSC, 1570 m a.s.l.) in the western Mediterranean Basin (WMB) were conducted for 10 months (July 2011-April 2012). An aerosol chemical speciation monitor (ACSM) was co-located with other online and offline PM1 measurements. Analyses of the hourly, diurnal, and seasonal variations are presented here, for the first time, for this region. <br><br> Seasonal trends in PM1 components are attributed to variations in evolution of the planetary boundary layer (PBL) height, air mass origin, and meteorological conditions. In summer, the higher temperature and solar radiation increases convection, enhancing the growth of the PBL and the transport of anthropogenic pollutants towards high altitude sites. Furthermore, the regional recirculation of air masses over the WMB creates a continuous increase in the background concentrations of PM1 components and causes the formation of reservoir layers at relatively high altitudes. The combination of all these atmospheric processes results in a high variability of PM1 components, with poorly defined daily patterns, except for the organic aerosols (OA). OA was mostly composed (up to 90%) of oxygenated organic aerosol (OOA), split in two types: semivolatile (SV-OOA) and low-volatility (LV-OOA), the rest being hydrocarbon-like OA (HOA). The marked diurnal cycles of OA components regardless of the air mass origin indicates that they are not only associated with anthropogenic and long-range-transported secondary OA (SOA) but also with recently produced biogenic SOA. Very different conditions drive the aerosol phenomenology in winter at MSC. The thermal inversions and the lower vertical development of the PBL leave MSC in the free troposphere most of the day, being affected by PBL air masses only after midday, when the mountain breezes transport emissions from the adjacent valleys and plains to the top of the mountain. This results in clear diurnal patterns of both organic and inorganic concentrations. OA was also mainly composed (71%) of OOA, with contributions from HOA (5%) and biomass burning OA (BBOA; 24%). Moreover, in winter sporadic long-range transport from mainland Europe is observed. The results obtained in the present study highlight the importance of SOA formation processes at a remote site such as MSC, especially in summer. Additional research is needed to characterize the sources and processes of SOA formation at remote sites.es_ES
dc.description.sponsorshipThis study was supported by the Ministry of Economy and Competitiveness and FEDER funds under the PRISMA (CGL2012-39623-C02-1) and CARIATI (CGL2008- 06294/CLI) projects, and by the Generalitat de Catalunya (AGAUR 2009 SGR8 and the DGQA). The research received funding from the European Union Seventh Framework Programme (FP7/ 2007-2013) ACTRIS under grant agreement no. 262254. We would like to extend their gratitude to the personnel from the COU and the OAdM. We would also like to express our gratitude to the NOAA Air Resources Laboratory (ARL) for the provision of the HYSPLIT transport and dispersion model, and boundary layer height calculation, used in this publication. D. A. Day and J. L. Jimenez thank the DOE (BER/ASR) DE-SC0011105 and NOAA NA13OAR4310063.es_ES
dc.publisherEuropean Geosciences Uniones_ES
dc.relationinfo:eu-repo/grantAgreement /EC/FP7/654109es_ES
dc.relation.isversionofPublisher's versiones_ES
dc.subjectaerosol compositiones_ES
dc.subjectaerosol formationes_ES
dc.subjectair masses_ES
dc.subjectconcentration (composition)es_ES
dc.subjecthigh temperaturees_ES
dc.subjectlong range transportes_ES
dc.subjectseasonal variationes_ES
dc.subjectspeciation (chemistry)es_ES
dc.titleLong-term real-time chemical characterization of submicron aerosols at Montsec (southern Pyrenees, 1570ma.s.l.)es_ES
dc.description.peerreviewedPeer reviewedes_ES
dc.relation.publisherversionDOI: 10.5194/acp-15-2935-2015es_ES
dc.rights.licenseCC Attribution 3.0 License.es_ES
dc.contributor.funderEuropean Commissiones_ES
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