Growth laws for atmospheric aerosol particles: An examination of the bimodality of the accumulation mode

Veli Matti Kerminen, Anthony S. Wexler

Research output: Contribution to journalArticle

99 Citations (Scopus)

Abstract

The growth of atmospheric aerosol particles was examined by first deriving growth laws and their corresponding time scales for all the important aerosol processes: condensation, coagulation, aqueous-phase reactions in droplets or aerosol particles, and reactions taking place at the interface of two phases. These: tools were then used to explore and explain the frequently observed splitting of the accumulation mode into two individual modes. Two environments-the remote marine boundary layer and the South Coast Air Basin of Los Angeles (SoCAB)-were considered. Our analysis points out that the observed mode separation cannot result from condensational or coagulational growth. In both the marine boundary layer and the SoCAB, H2O2/O3 sulfate formation in droplets during clouds or fogs provides all the features required for explaining the bimodality. In the SoCAB, this process may be assisted or even dominated by the trace metal catalyzed droplet-phase SO2 oxidation.

Original languageEnglish (US)
Pages (from-to)3263-3275
Number of pages13
JournalAtmospheric Environment
Volume29
Issue number22
StatePublished - Nov 1995
Externally publishedYes

Fingerprint

Atmospheric aerosols
Particles (particulate matter)
Coastal zones
aerosol
Aerosols
Boundary layers
Air
droplet
coast
air
boundary layer
basin
Fog
Coagulation
Condensation
cloud droplet
fog
coagulation
trace metal
Oxidation

Keywords

  • aqueous-phase chemistry
  • Atmospheric aerosols
  • coagulation
  • condensation
  • growth laws
  • interphase reactions
  • particle size distribution
  • time scale

ASJC Scopus subject areas

  • Environmental Science(all)
  • Atmospheric Science
  • Pollution
  • Earth and Planetary Sciences(all)

Cite this

Growth laws for atmospheric aerosol particles : An examination of the bimodality of the accumulation mode. / Kerminen, Veli Matti; Wexler, Anthony S.

In: Atmospheric Environment, Vol. 29, No. 22, 11.1995, p. 3263-3275.

Research output: Contribution to journalArticle

Kerminen, Veli Matti ; Wexler, Anthony S. / Growth laws for atmospheric aerosol particles : An examination of the bimodality of the accumulation mode. In: Atmospheric Environment. 1995 ; Vol. 29, No. 22. pp. 3263-3275.
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