Sources and mixing state of summertime background aerosol in the north-western Mediterranean basin

dc.contributor.authorArndt, Jovanna
dc.contributor.authorSciare, Jean
dc.contributor.authorMallet, Marc
dc.contributor.authorRoberts, Greg C.
dc.contributor.authorMarchand, Nicolas
dc.contributor.authorSartelet, Karine
dc.contributor.authorSellegri, Karine
dc.contributor.authorDulac, Francois
dc.contributor.authorHealy, Robert M.
dc.contributor.authorWenger, John C.
dc.contributor.funderIrish Research Council
dc.contributor.funderContrat de Plan Etat Region
dc.contributor.funderAgence de l'Eau Rhône Méditerranée Corse
dc.contributor.funderInstitut National des Sciences de l'Univers, Centre National de la Recherche Scientifique
dc.contributor.funderCommissariat à l'Énergie Atomique et aux Énergies Alternatives
dc.contributor.funderAgence de l'Environnement et de la Maîtrise de l'Energie
dc.contributor.funderAgence Nationale de la Recherche
dc.description.abstractAn aerosol time-of-flight mass spectrometer (ATOFMS) was employed to provide real-time single particle mixing state and thereby source information for aerosols impacting the western Mediterranean basin during the ChArMEx-ADRIMED and SAF-MED campaigns in summer 2013. The ATOFMS measurements were made at a ground-based remote site on the northern tip of Corsica. Twenty-seven distinct ATOFMS particle classes were identified and subsequently grouped into eight general categories: EC-rich (elemental carbon), K-rich, Na-rich, amines, OC-rich (organic carbon), V-rich, Fe-rich and Ca-rich particles. Mass concentrations were reconstructed for the ATOFMS particle classes and found to be in good agreement with other co-located quantitative measurements (PM1, black carbon (BC), organic carbon, sulfate mass and ammonium mass). Total ATOFMS reconstructed mass (PM2.5) accounted for 70-90% of measured PM10 mass and was comprised of regionally transported fossil fuel (EC-rich) and biomass burning (K-rich) particles. The accumulation of these transported particles was favoured by repeated and extended periods of air mass stagnation over the western Mediterranean during the sampling campaigns. The single particle mass spectra proved to be valuable source markers, allowing the identification of fossil fuel and biomass burning combustion sources, and was therefore highly complementary to quantitative measurements made by Particle into Liquid Sampler ion chromatography (PILS-IC) and an aerosol chemical speciation monitor (ACSM), which have demonstrated that PM1 and PM10 were comprised predominantly of sulfate, ammonium and OC. Good temporal agreement was observed between ATOFMS EC-rich and K-rich particle mass concentrations and combined mass concentrations of BC, sulfate, ammonium and low volatility oxygenated organic aerosol (LV-OOA). This combined information suggests that combustion of fossil fuels and biomass produced primary EC- and OC-containing particles, which then accumulated ammonium, sulfate and alkylamines during regional transport. Three other sources were also identified: local biomass burning, marine and shipping. Local combustion particlesen
dc.description.sponsorshipAgence Nationale de la Recherche (ANR-11-BS56-0006; ANR-12-BS06-0013); Meteo-France (Mediterranean Integrated Studies aT Regional And Local Scales)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.identifier.citationArndt, J., Sciare, J., Mallet, M., Roberts, G. C., Marchand, N., Sartelet, K., Sellegri, K., Dulac, F., Healy, R. M. and Wenger, J. C. (2017) 'Sources and mixing state of summertime background aerosol in the north-western Mediterranean basin', Atmospheric Chemistry and Physics, 17(11), (27pp). doi: 10.5194/acp-17-6975-2017en
dc.identifier.journaltitleAtmospheric Chemistry and Physicsen
dc.publisherCopernicus Gesellschaft Mbhen
dc.rights© 2017, the Author(s). This work is distributed under the Creative Commons Attribution 3.0 License.en
dc.subjectParticle mass spectrometryen
dc.subjectLaser desorption ionizationen
dc.subjectMethanesulfonic acid wateren
dc.subjectSecondary organic aerosolen
dc.subjectFine particulate matteren
dc.subjectLong range transporten
dc.subjectFired power stationen
dc.subjectChemical compositionen
dc.subjectReal timeen
dc.subjectSource apportionmenten
dc.titleSources and mixing state of summertime background aerosol in the north-western Mediterranean basinen
dc.typeArticle (peer-reviewed)en
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