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No particle mass enhancement from induced atmospheric ageing at a rural site in northern Europe

Ahlberg, Erik LU ; Ausmeel, Stina LU ; Eriksson, Axel LU ; Holst, Thomas LU ; Karlsson, Tomas LU ; Brune, William H.; Frank, Göran LU ; Roldin, Pontus LU ; Kristensson, Adam LU and Svenningsson, Birgitta LU (2019) In Atmosphere 10(7).
Abstract

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... (More)

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.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Ambient aerosol, Oxidation flow reactor, PAM, Secondary organic aerosol
in
Atmosphere
volume
10
issue
7
publisher
MDPI AG
external identifiers
  • scopus:85070545122
ISSN
2073-4433
DOI
10.3390/atmos10070408
language
English
LU publication?
yes
id
f99f5354-2c9a-465e-a145-eddb334ab0fd
date added to LUP
2019-08-30 11:11:23
date last changed
2019-09-17 04:59:39
@article{f99f5354-2c9a-465e-a145-eddb334ab0fd,
  abstract     = {<p>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.</p>},
  articleno    = {408},
  author       = {Ahlberg, Erik and Ausmeel, Stina and Eriksson, Axel and Holst, Thomas and Karlsson, Tomas and Brune, William H. and Frank, Göran and Roldin, Pontus and Kristensson, Adam and Svenningsson, Birgitta},
  issn         = {2073-4433},
  keyword      = {Ambient aerosol,Oxidation flow reactor,PAM,Secondary organic aerosol},
  language     = {eng},
  month        = {07},
  number       = {7},
  publisher    = {MDPI AG},
  series       = {Atmosphere},
  title        = {No particle mass enhancement from induced atmospheric ageing at a rural site in northern Europe},
  url          = {http://dx.doi.org/10.3390/atmos10070408},
  volume       = {10},
  year         = {2019},
}