Variability of sub-micrometer particle number size distributions and concentrations in the Western Mediterranean regional background

This study focuses on the daily and seasonal variability of particle number size distributions and concentrations, performed at the Montseny (MSY) regional background station in the western Mediterranean from October 2010 to June 2011. Particle number concentrations at MSY were shown to be within ra...

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Autores: Cusack, Michael, Pérez, Noemí, Pey, Jorge, Wiedensohler, Alfred, Alastuey, Andrés, Querol, Xavier
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2013
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/122751
Acceso en línea:http://hdl.handle.net/10261/122751
Access Level:acceso abierto
Palabra clave:Nucleation
Number concentration
Photochemistry
Western Mediterranean
Sub-micrometer particle size distribution
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spelling Variability of sub-micrometer particle number size distributions and concentrations in the Western Mediterranean regional backgroundCusack, MichaelPérez, NoemíPey, JorgeWiedensohler, AlfredAlastuey, AndrésQuerol, XavierNucleationNumber concentrationPhotochemistryWestern MediterraneanSub-micrometer particle size distributionThis study focuses on the daily and seasonal variability of particle number size distributions and concentrations, performed at the Montseny (MSY) regional background station in the western Mediterranean from October 2010 to June 2011. Particle number concentrations at MSY were shown to be within range of various other sites across Europe reported in literature, but the seasonality of the particle number size distributions revealed significant differences. The Aitken mode is the dominant particle mode at MSY, with arithmetic mean concentrations of 1698 cm3, followed by the accumulation mode (877 cm-3) and the nucleation mode (246 cm-3). Concentrations showed a strong seasonal variability with large increases in particle number concentrations observed from the colder to warmer months. The modality of median size distributions was typically bimodal, except under polluted conditions when the size distribution was unimodal. During the colder months, the daily variation of particle number size distributions are strongly influenced by a diurnal breeze system, whereby the Aitken and accumulation modes vary similarly to PM1 and BC mass concentrations, with nocturnal minima and sharp day-time increases owing to the development of a diurnal mountain breeze. Under clean air conditions, high levels of nucleation and lower Aitken mode concentrations were measured, highlighting the importance of new particle formation as a source of particles in the absence of a significant condensation sink. During the warmer months, nucleation mode concentrations were observed to be relatively elevated both under polluted and clean conditions due to increased photochemical reactions, with enhanced subsequent growth owing to elevated concentrations of condensable organic vapours produced from biogenic volatile organic compounds, indicating that nucleation at MSY does not exclusively occur under clean air conditions. Finally, mixing of air masses between polluted and non-polluted boundary layer air, and brief changes in the air mass being sampled gave rise to unusual particle number size distributions, with specific cases of such behaviour discussed at length.This study was supported by the Ministry of Economy and Competitiveness and FEDER funds under the projects CARIATI (CGL2008-06294/CLI), VAMOS (CGL2010 19464/CLI) and GRACCIE (CSD 2007-00067), and from the Generalitat de Catalunya 2009 SGR8. The research leading to these results has received funding from the European Union Seventh Framework Programme (FP7/ 2007-2013) ACTRIS under grant agreement no. 262254. The authors would like to extend their gratitude to Jesu´ s Parga and Jordi Gil for their technical support. The authors also thank METEOCAT for the meteorological data and the NOAA Air Resources Laboratory (ARL) for the provision of the HYSPLIT transport and dispersion model and/or READY website (http://www.arl.noaa.gov/ ready.html) used in this publication.Peer reviewedCo-Action PublishingEuropean CommissionConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201520152013info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/122751reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement /EC/FP7/65410910.3402/tellusb.v65i0.19243Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1227512026-05-22T06:33:51Z
dc.title.none.fl_str_mv Variability of sub-micrometer particle number size distributions and concentrations in the Western Mediterranean regional background
title Variability of sub-micrometer particle number size distributions and concentrations in the Western Mediterranean regional background
spellingShingle Variability of sub-micrometer particle number size distributions and concentrations in the Western Mediterranean regional background
Cusack, Michael
Nucleation
Number concentration
Photochemistry
Western Mediterranean
Sub-micrometer particle size distribution
title_short Variability of sub-micrometer particle number size distributions and concentrations in the Western Mediterranean regional background
title_full Variability of sub-micrometer particle number size distributions and concentrations in the Western Mediterranean regional background
title_fullStr Variability of sub-micrometer particle number size distributions and concentrations in the Western Mediterranean regional background
title_full_unstemmed Variability of sub-micrometer particle number size distributions and concentrations in the Western Mediterranean regional background
title_sort Variability of sub-micrometer particle number size distributions and concentrations in the Western Mediterranean regional background
dc.creator.none.fl_str_mv Cusack, Michael
Pérez, Noemí
Pey, Jorge
Wiedensohler, Alfred
Alastuey, Andrés
Querol, Xavier
author Cusack, Michael
author_facet Cusack, Michael
Pérez, Noemí
Pey, Jorge
Wiedensohler, Alfred
Alastuey, Andrés
Querol, Xavier
author_role author
author2 Pérez, Noemí
Pey, Jorge
Wiedensohler, Alfred
Alastuey, Andrés
Querol, Xavier
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv European Commission
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Nucleation
Number concentration
Photochemistry
Western Mediterranean
Sub-micrometer particle size distribution
topic Nucleation
Number concentration
Photochemistry
Western Mediterranean
Sub-micrometer particle size distribution
description This study focuses on the daily and seasonal variability of particle number size distributions and concentrations, performed at the Montseny (MSY) regional background station in the western Mediterranean from October 2010 to June 2011. Particle number concentrations at MSY were shown to be within range of various other sites across Europe reported in literature, but the seasonality of the particle number size distributions revealed significant differences. The Aitken mode is the dominant particle mode at MSY, with arithmetic mean concentrations of 1698 cm3, followed by the accumulation mode (877 cm-3) and the nucleation mode (246 cm-3). Concentrations showed a strong seasonal variability with large increases in particle number concentrations observed from the colder to warmer months. The modality of median size distributions was typically bimodal, except under polluted conditions when the size distribution was unimodal. During the colder months, the daily variation of particle number size distributions are strongly influenced by a diurnal breeze system, whereby the Aitken and accumulation modes vary similarly to PM1 and BC mass concentrations, with nocturnal minima and sharp day-time increases owing to the development of a diurnal mountain breeze. Under clean air conditions, high levels of nucleation and lower Aitken mode concentrations were measured, highlighting the importance of new particle formation as a source of particles in the absence of a significant condensation sink. During the warmer months, nucleation mode concentrations were observed to be relatively elevated both under polluted and clean conditions due to increased photochemical reactions, with enhanced subsequent growth owing to elevated concentrations of condensable organic vapours produced from biogenic volatile organic compounds, indicating that nucleation at MSY does not exclusively occur under clean air conditions. Finally, mixing of air masses between polluted and non-polluted boundary layer air, and brief changes in the air mass being sampled gave rise to unusual particle number size distributions, with specific cases of such behaviour discussed at length.
publishDate 2013
dc.date.none.fl_str_mv 2013
2015
2015
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/122751
url http://hdl.handle.net/10261/122751
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement /EC/FP7/654109
10.3402/tellusb.v65i0.19243
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Co-Action Publishing
publisher.none.fl_str_mv Co-Action Publishing
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.81155

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