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Open AccessArticle

No Particle Mass Enhancement from Induced Atmospheric Ageing at a Rural Site in Northern Europe

1
Centre for Environmental and Climate Research, Lund University, Sölvegatan 37, 223 52 Lund, Sweden
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Division of Nuclear Physics, Lund University, Box 118, 221 00 Lund, Sweden
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Ergonomics and Aerosol Technology, Lund University, Box 118, 221 00 Lund, Sweden
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Department of Physical Geography and Ecosystem Science, Lund University, Sölvegatan 12, 223 62 Lund, Sweden
5
Department of Meteorology and Atmospheric Science, Pennsylvania State University, University Park, PA 16802, USA
*
Author to whom correspondence should be addressed.
Atmosphere 2019, 10(7), 408; https://doi.org/10.3390/atmos10070408
Received: 20 June 2019 / Revised: 12 July 2019 / Accepted: 15 July 2019 / Published: 17 July 2019
(This article belongs to the Special Issue Ambient Aerosol Measurements in Different Environments)
A large portion of atmospheric aerosol particles consists of secondary material produced by oxidation reactions. The relative importance of secondary organic aerosol (SOA) can increase with improved emission regulations. A relatively simple way to study potential particle formation in the atmosphere is by using oxidation flow reactors (OFRs) which simulate atmospheric ageing. Here we report on the first ambient OFR ageing experiment in Europe, coupled with scanning mobility particle sizer (SMPS), aerosol mass spectrometer (AMS) and proton transfer reaction (PTR)-MS measurements. We found that the simulated ageing did not produce any measurable increases in particle mass or number concentrations during the two months of the campaign due to low concentrations of precursors. Losses in the reactor increased with hydroxyl radical (OH) exposure and with increasing difference between ambient and reactor temperatures, indicating fragmentation and evaporation of semivolatile material. View Full-Text
Keywords: oxidation flow reactor; secondary organic aerosol; ambient aerosol; PAM oxidation flow reactor; secondary organic aerosol; ambient aerosol; PAM
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Ahlberg, E.; Ausmeel, S.; Eriksson, A.; Holst, T.; Karlsson, T.; Brune, W.H.; Frank, G.; Roldin, P.; Kristensson, A.; Svenningsson, B. No Particle Mass Enhancement from Induced Atmospheric Ageing at a Rural Site in Northern Europe. Atmosphere 2019, 10, 408.

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