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Number concentrations and modal structure of indoor/outdoor fine particles in four European cities

Lazaridis Michail, Eleftheriadis, Konstantinos, Ždímal Vladimír, Schwarz Jaroslav, Wagner Zdeněk, Ondráček Jakub, Drossinos, Ioannis, Glytsos Theodoros, Vratolis Sterios, Tørseth, Kjetil 1966-, Moravec Pavel, Hussein Tareq, Smolík Jiří

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URIhttp://purl.tuc.gr/dl/dias/76910687-1F86-4F79-85D8-7370FAEF7553-
Identifierhttp://www.aaqr.org/doi/10.4209/aaqr.2015.04.0267-
Identifierhttps://doi.org/10.4209/aaqr.2015.04.0267-
Languageen-
Extent16 pagesen
TitleNumber concentrations and modal structure of indoor/outdoor fine particles in four European citiesen
CreatorLazaridis Michailen
CreatorΛαζαριδης Μιχαηλel
CreatorEleftheriadis, Konstantinosen
CreatorŽdímal Vladimíren
CreatorSchwarz Jaroslaven
CreatorWagner Zdeněken
CreatorOndráček Jakuben
CreatorDrossinos, Ioannisen
CreatorGlytsos Theodorosen
CreatorΓλυτσος Θεοδωροςel
CreatorVratolis Steriosen
CreatorTørseth, Kjetil 1966-en
CreatorMoravec Pavelen
CreatorHussein Tareqen
CreatorSmolík Jiříen
PublisherAAGR Aerosol and Air Quality Researchen
Content SummaryIndoor/outdoor aerosol size distribution was measured in four European cities (Oslo–Norway, Prague–Czech Republic, Milan–Italy and Athens–Greece) during 2002 in order to examine the differences in the characteristics of the indoor/outdoor modal structure and to evaluate the effect of indoor sources to the aerosol size distributions. All the measurement sites were naturally ventilated and were occupied during the campaigns by permanent residents or for certain time periods by the technical staff responsible for the instrumentation. Outdoor particle number (PN) concentrations presented the higher values in Milan and Athens (median values 1.4 × 104 # cm–3 and 2.9 × 104 # cm–3 respectively) as a result of elevated outdoor emissions and led to correspondingly higher indoor values compared to Oslo and Prague. In absence of indoor activities, the indoor concentrations followed the fluctuations of the outdoor concentrations in all the measurement sites. Indoor activities (cooking, smoking, etc.) resulted in elevated indoor PN concentrations (maximum values ranging between 1.7 × 105 # cm–3 and 3.2 × 105 # cm–3) and to I/O ratios higher than one. The I/O ratios were size dependant and for periods without indoor activities, they presented the lowest values for particles < 50 nm (0.51 ± 0.15) and the ratios increased with fine particle size (0.79 ± 0.12 for particles between 100–200 nm). The analysis of the modal structure showed that the indoor aerosol size distribution characteristics differ from the outdoors under the effect of indoor sources. The percentage of unimodal size distributions increased during indoor emissions, compared to periods without indoor sources, along with the number concentration of Aitken mode particles, indicating emissions in specific size ranges according to the type of the indoor source. en
Type of ItemPeer-Reviewed Journal Publicationen
Type of ItemΔημοσίευση σε Περιοδικό με Κριτέςel
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2018-07-03-
Date of Publication2017-
SubjectI/O ratioen
SubjectIndoor sourcesen
SubjectIndoor/Outdoor aerosolen
SubjectModal structureen
Bibliographic CitationM. Lazaridis, K. Eleftheriadis, V. Ždímal, J. Schwarz, Z. Wagner, J. Ondráček, Y. Drossinos, T. Glytsos, S. Vratolis, K. Torseth, P. Moravec, T. Hussein and J. Smolík, "Number concentrations and modal structure of indoor/outdoor fine particles in four European cities" Aerosol Air Qual. Res., vol. 17, no 1, Jan. 2017, pp. 131-146. doi: 10.4209/aaqr.2015.04.0267en

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