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Annual and interannual variation in boreal forest aerosol particle number and volume concentration and their connection to particle formation
Stockholm University, Faculty of Science, Department of Applied Environmental Science (ITM).
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2008 (English)In: Tellus. Series B, Chemical and physical meteorology, ISSN 0280-6509, E-ISSN 1600-0889, Vol. 60, no 4, 495-508 p.Article in journal (Refereed) Published
Abstract [en]

We investigated size-resolved submicrometre aerosol particle number and volume concentration time series as well as aerosol dynamic parameters derived front Differential Mobility Particle Sizer (DMPS) measurements at five background stations in the Nordic boreal forest area. The stations in question were Aspvreten, Hyytiala and Uto in Southern Finland and Sweden, and Varrio and Pallas in the Finnish Lapland. The objective Of Our investigation was to identify and quantity annual and interannual variation observable in the time series. We found that the total number and mass concentrations were touch lower at the Lapland stations than at the southern stations and that the total particle number was strongly correlated to particle formation event frequency. The annual total number concentration followed the annual distribution of particle formation events at the Southern stations but much less clearly at the Lapland stations. The volume concentration was highest during summer, in line with higher condensation growth rates: this is in line with the assumption that a large part of the particle volume is produced by oxidized plant emissions. The decrease of sulphate emissions in Europe was not visible in our data set. Aerosol dynamic parameters such as condensation sink, condensation sink diameter and the power law exponent linking coagulation losses and condensation sink are presented to characterize the submicron Nordic background aerosol.

Place, publisher, year, edition, pages
2008. Vol. 60, no 4, 495-508 p.
Keyword [en]
size distribution data, boundary-layer, atmospheric aerosols; nucleation events, northern finland, air-pollution, smear-ii, cloud, station, growth
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:su:diva-57896DOI: 10.1111/j.1600-0889.2008.00366.xISI: 000259575400004OAI: oai:DiVA.org:su-57896DiVA: diva2:419244
Note
authorCount :9Available from: 2011-05-26 Created: 2011-05-23 Last updated: 2017-12-11Bibliographically approved

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Tunved, PeterHansson, Hans-Christen
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