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New aerosol particle formation in different synoptic situations at Hyytiala, Southern Finland
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, 485-494 p.Article in journal (Refereed) Published
Abstract [en]

We examine the meteorological conditions favourable for new particle formation as a contribution to clarifying the responsible processes. Synoptic weather maps and satellite images over Southern Finland for 2003-2005 were examined, focusing mainly on air mass types, atmospheric frontal passages. and cloudiness. Arctic air masses are most favourable for new aerosol particle formation in the boreal forest. New particle formation tends to occur on days after passage of a cold front and on days without frontal passages. Cloudiness, often associated with frontal passages, decreases the amount of: solar radiation. reducing the growth of new particles. When cloud cover exceeds 3-4 octas, particle formation proceeds at a slower rate or does not occur at all. During 2003-2005, the conditions that favour particle formation Lit Hyytiala (Arctic air mass, post-cold-frontal passage or no frontal passage and cloudiness less than 3-4 octas) occur oil 198 d. On 105 (57%) of those days, new particle formation occurred, indicating that these meteorological conditions alone can favour, but are not sufficient for, new particle formation and growth. In contrast, 53 d (28%) were classified as undefined days; 30 d (15%) were non-event days, where no evidence of increasing particle concentration and growth has been noticed.

Place, publisher, year, edition, pages
2008. Vol. 60, no 4, 485-494 p.
Keyword [en]
continental boundary-layer, ion-induced nucleation, sulfuric-acid, size distribution, warm-front, meteorological parameters, air masses, smear-ii, growth, model
National Category
Meteorology and Atmospheric Sciences Natural Sciences
URN: urn:nbn:se:su:diva-57888DOI: 10.1111/j.1600-0889.2008.00364.xISI: 000259575400003OAI: diva2:418416
authorCount :7Available from: 2011-05-23 Created: 2011-05-23 Last updated: 2011-05-23Bibliographically approved

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Department of Applied Environmental Science (ITM)
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Tellus. Series B, Chemical and physical meteorology
Meteorology and Atmospheric SciencesNatural Sciences

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