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Southern scandinavian aerosol composition and elemental size distribution characteristics dependence on air-mass history

Martinsson, Bengt G. LU ; Hansson, Hans Christen and Lannefors, Hans O. (1984) In Atmospheric Environment (1967) 18(10). p.2167-2182
Abstract


The influence of aerosol long range transport in southern Sweden was investigated from a data base consisting of simultaneous cascade impactor measurements at three sampling stations, two coastal and one inland rural location. The study focused on S and heavy metals determined by particle induced X-ray emission (PIXE) analysis. The influence of local emissions was minimized by eliminating samples which were strongly suspected to be contaminated. These were identified through size distribution alterations in combination with the concentration levels obtained. Based on air mass back trajectories the samples were classified into either a southern, a northern or an eastern sector or into one of the buffer... (More)


The influence of aerosol long range transport in southern Sweden was investigated from a data base consisting of simultaneous cascade impactor measurements at three sampling stations, two coastal and one inland rural location. The study focused on S and heavy metals determined by particle induced X-ray emission (PIXE) analysis. The influence of local emissions was minimized by eliminating samples which were strongly suspected to be contaminated. These were identified through size distribution alterations in combination with the concentration levels obtained. Based on air mass back trajectories the samples were classified into either a southern, a northern or an eastern sector or into one of the buffer sectors located in between the sectors mentioned above. Sector S elemental concentrations were generally one order of magnitude higher than those of sector N, while intermediate concentrations were found in the E sector. Intercomparisons of simultaneous fine mode elemental concentration measurements classified into sectors S and N, respectively, provides a method for calculating the sector S foreign contribution of the elemental concentrations in southern Sweden. These calculations, not based on emission data, result in a foreign contribution of the order of 50-90 % (lowest for components like V and Ni and highest for Ti, Mn and Zn) to the metal concentrations. The multivariate statistical method SIMCA revealed that the sector S aerosol elemental composition was dependent on particle size in the accumulation mode. Elements such as S and V (or Ni) normally assumed to originate mainly from the same sources (fossil fuel combustion) were clearly separated and instead S clustered with K, Mn and Zn. This indicates that the transformation processes are more important for the covariation of S with other elements than the source origin. Transformation of SO
2
in hygroscopic particles rich in K., Mn and Zn (compared with less hygroscopic particles rich in V and Ni) is a possible mechanism which would explain the results found.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
accumulation mode structure, Aerosol composition, cascade impactor, heavy metals, long-range transport, multivariate statistics, normalization, SIMCA, size distribution, sulphur, transformation and PIXE
in
Atmospheric Environment (1967)
volume
18
issue
10
pages
16 pages
publisher
Elsevier
external identifiers
  • scopus:0021184581
ISSN
0004-6981
DOI
10.1016/0004-6981(84)90204-X
language
English
LU publication?
yes
id
abbd23c0-f566-42ac-9b7d-55bc93a5aa19
date added to LUP
2019-05-16 09:53:28
date last changed
2019-07-25 13:00:43
@article{abbd23c0-f566-42ac-9b7d-55bc93a5aa19,
  abstract     = {<p><br>
                            The influence of aerosol long range transport in southern Sweden was investigated from a data base consisting of simultaneous cascade impactor measurements at three sampling stations, two coastal and one inland rural location. The study focused on S and heavy metals determined by particle induced X-ray emission (PIXE) analysis. The influence of local emissions was minimized by eliminating samples which were strongly suspected to be contaminated. These were identified through size distribution alterations in combination with the concentration levels obtained. Based on air mass back trajectories the samples were classified into either a southern, a northern or an eastern sector or into one of the buffer sectors located in between the sectors mentioned above. Sector S elemental concentrations were generally one order of magnitude higher than those of sector N, while intermediate concentrations were found in the E sector. Intercomparisons of simultaneous fine mode elemental concentration measurements classified into sectors S and N, respectively, provides a method for calculating the sector S foreign contribution of the elemental concentrations in southern Sweden. These calculations, not based on emission data, result in a foreign contribution of the order of 50-90 % (lowest for components like V and Ni and highest for Ti, Mn and Zn) to the metal concentrations. The multivariate statistical method SIMCA revealed that the sector S aerosol elemental composition was dependent on particle size in the accumulation mode. Elements such as S and V (or Ni) normally assumed to originate mainly from the same sources (fossil fuel combustion) were clearly separated and instead S clustered with K, Mn and Zn. This indicates that the transformation processes are more important for the covariation of S with other elements than the source origin. Transformation of SO<br>
                            <sub>2</sub><br>
                             in hygroscopic particles rich in K., Mn and Zn (compared with less hygroscopic particles rich in V and Ni) is a possible mechanism which would explain the results found.</p>},
  author       = {Martinsson, Bengt G. and Hansson, Hans Christen and Lannefors, Hans O.},
  issn         = {0004-6981},
  keyword      = {accumulation mode structure,Aerosol composition,cascade impactor,heavy metals,long-range transport,multivariate statistics,normalization,SIMCA,size distribution,sulphur,transformation and PIXE},
  language     = {eng},
  month        = {01},
  number       = {10},
  pages        = {2167--2182},
  publisher    = {Elsevier},
  series       = {Atmospheric Environment (1967)},
  title        = {Southern scandinavian aerosol composition and elemental size distribution characteristics dependence on air-mass history},
  url          = {http://dx.doi.org/10.1016/0004-6981(84)90204-X},
  volume       = {18},
  year         = {1984},
}