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The Eyjafjallajökull ash plume - Part I: Physical, chemical and optical characteristics

dc.contributor.authorO'Dowd, Colin
dc.contributor.authorCeburnis, Darius
dc.contributor.authorOvadnevaite, Jurgita
dc.contributor.authorMartucci, Giovanni
dc.contributor.authorBialek, Jakub
dc.contributor.authorMonahan, Ciaran
dc.contributor.authorBerresheim, Harald
dc.contributor.authorVaishya, Aditya
dc.contributor.authorGrigas, Tomas
dc.contributor.authorJennings, S. Gerard
dc.contributor.authorMcVeigh, Philip
dc.contributor.authorVarghese, Saji
dc.contributor.authorFlanagan, Robert
dc.contributor.authorMartin, Damien
dc.contributor.authorMoran, Eoin
dc.contributor.authorLambkin, Keith
dc.contributor.authorSemmler, Tido
dc.contributor.authorPerrino, Cinzia
dc.contributor.authorMcGrath, Ray
dc.date.accessioned2015-10-02T13:14:19Z
dc.date.available2015-10-02T13:14:19Z
dc.date.issued2012
dc.identifier.citationColin O'Dowd, Darius Ceburnis, Jurgita Ovadnevaite, Giovanni Martucci, Jakub Bialek, Ciaran Monahan, Harald Berresheim, Aditya Vaishya, Tomas Grigas, S. Gerard Jennings, Philip McVeigh, Saji Varghese, Robert Flanagan, Damien Martin, Eoin Moran, Keith Lambkin, Tido Semmler, Cinzia Perrino, Ray McGrath, 'The Eyjafjallajökull ash plume - Part I: Physical, chemical and optical characteristics', 2012, Atmospheric Environment, 48, 2012
dc.descriptionThe Eyjafjallajökull ash plume was detected at the Mace Head Atmospheric Research Station numerous times from April 19th till 18th May 2010 following subsidence into, and dilution in, the boundary layer. The three strongest of these events, lasting 12-18 h, are analysed in detail in terms of physical, chemical and optical properties. The ash size distribution was bimodal with a supermicron mode of 2.5um diameter for the one case where it was measured. The submicron mode varied from 185 nm during the high-explosive phase to 395 nm during the low-explosive phase. Non-sea-salt (nss)-sulphate mass was 2.5 times higher during the low-explosive phase. Total particle concentrations ranged from 760 cm -3 to 1247 cm -3 and were typical of clean air in the region. Between 30% and 39% of submicron chemical mass (i.e. exclusive of water content) was ash primarily composed of silicon dioxide while accounting for the water content, the submicron aerosol was composed of primary ash (15%), nss-sulphate (25%) and water (55%). Hygroscopic growth factors were characteristic of sulphate aerosol but revealed an internally- mixed aerosol pointing to a mix of predominantly primary ash, nss-sulphate and water. For the majority of the ash plumes, all condensation nuclei (CN, diameter >10 nm) were activated into cloud condensation nuclei (CCN) at a supersaturation of 0.25%. Aerosol absorption increased by about a factor of two in the plume, compared to background levels, while aerosol scattering coefficients increased by an order of magnitude.en
dc.language.isoenen
dc.publisherElsevieren
dc.rightsYen
dc.subjectVolcanic ash plumeen
dc.subjectAerosolen
dc.subjectDispersionen
dc.subjectMace Headen
dc.titleThe Eyjafjallajökull ash plume - Part I: Physical, chemical and optical characteristicsen
dc.typejournal articleen
dc.type.supercollectionedepositireland
dc.contributor.corporatenameMet Éireannen
dc.contributor.corporatenameConsiglio nazionale delle ricerche (Italy). Instituto sull'Inquinamento Atmosfericoen
dc.contributor.corporatenameNational University of Ireland, Galway. Centre for Climate & Air Pollution Studiesen
dc.identifier.doi10.1016/j.atmosenv.2011.07.004
dc.rights.ecaccessrightsopenAccess
dc.relation.ispartofseriesdate2012en
dc.relation.ispartofseriestitleAtmospheric Environmenten
dc.relation.ispartofseriesvolume48en
dc.identifier.urihttp://hdl.handle.net/2262/74717


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