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Measurement of the Charging State with an Ion-DMPS to Estimate the Contribution of Ion-induced Nucleation

  • Veli-Matti Kerminen
  • Pasi Aalto
  • Markku Kulmala
  • Stephanie Gagne
  • Lauri Laakso
  • Tuukka Petäjä
Conference paper

In this work, the Ion-DMPS is presented and the analyzed data from over one year of measurements in Hyytiälä, Finland (April 13, 2005–September 21, 2006), is discussed. The Ion-DMPS allows calculation of the charging state of particles taking part in a nucleation event. A physically sound equation that describes that charging state of particles during a nucleation event is presented and fitted to the Ion-DMPS data. The behavior predicted by the equation of the charging state fitted very well to the experimental data obtained from the Ion-DMPS. According to this analysis, an overwhelming majority of the new particle formation events appeared to include at least some participation of ion-induced nucleation. The analysis of a year of data showed that the contribution of ion-induced nucleation varied between 0% and slightly less than 40%. The median ion-induced participation for the new particle formation events analyzed was between 5% and 10%.

Keywords Ion-induced nucleation, atmospheric aerosols, field measurements, Ion-DMPS

Keywords

Aerosol Particle Atmospheric Aerosol Nucleation Event Nucleation Mechanism Nucleation Mode 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer 2007

Authors and Affiliations

  • Veli-Matti Kerminen
    • 1
  • Pasi Aalto
    • 2
  • Markku Kulmala
    • 2
  • Stephanie Gagne
    • 2
  • Lauri Laakso
    • 2
  • Tuukka Petäjä
    • 2
  1. 1.Finnish Meteorological InstituteFinland
  2. 2.Department of Physical SciencesUniversity of HelsinkiFinland

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