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AGU: Geophysical Research Letters

 

Index Terms

  • Atmospheric Composition and Structure: Aerosols and particles
  • Atmospheric Composition and Structure: Constituent sources and sinks
  • Biogeosciences: Biosphere/atmosphere interactions
  • Atmospheric Processes: Clouds and aerosols

Abstract

GEOPHYSICAL RESEARCH LETTERS, VOL. 32, L11802, 4 PP., 2005
doi:10.1029/2005GL022473

“Missing” cloud condensation nuclei in peat smoke

U. Dusek

Biogeochemistry Department, Max Planck Institute for Chemistry, Mainz, Germany

G. P. Frank

Biogeochemistry Department, Max Planck Institute for Chemistry, Mainz, Germany

G. Helas

Biogeochemistry Department, Max Planck Institute for Chemistry, Mainz, Germany

Y. Iinuma

Leibniz Institute for Tropospheric Research, Leipzig, Germany

K. Zeromskiene

Leibniz Institute for Tropospheric Research, Leipzig, Germany

P. Gwaze

Biogeochemistry Department, Max Planck Institute for Chemistry, Mainz, Germany

T. Hennig

Leibniz Institute for Tropospheric Research, Leipzig, Germany

A. Massling

Leibniz Institute for Tropospheric Research, Leipzig, Germany

O. Schmid

Biogeochemistry Department, Max Planck Institute for Chemistry, Mainz, Germany

H. Herrmann

Leibniz Institute for Tropospheric Research, Leipzig, Germany

A. Wiedensohler

Leibniz Institute for Tropospheric Research, Leipzig, Germany

M. O. Andreae

Biogeochemistry Department, Max Planck Institute for Chemistry, Mainz, Germany

We characterized particulate emissions from vegetation fires by burning Indonesian and German peat and other biomass fuels in a controlled laboratory setting. By measuring cloud condensation nuclei (CCN) both as a function of particle diameter (dp) and supersaturation (S), we discovered particles in peat smoke that were not activated to cloud droplets at high S (1.6%). These hydrophobic particles were present predominantly in the size range of dp > 200 nm, where typical wood burning particles are activated at S < 0.3%. Ambient measurements during the 1997 Indonesian peat fires suggested that peat smoke particles are highly soluble and therefore efficient CCN. Our CCN measurements performed on fresh smoke from peat samples of the same area suggest that these Indonesian smoke particles probably acquired soluble material through chemical processing in the atmosphere. Freshly emitted peat smoke particles are at least partially not very efficient CCN.

Received 18 January 2005; accepted 21 April 2005; published 2 June 2005.

Citation: Dusek, U., et al. (2005), “Missing” cloud condensation nuclei in peat smoke, Geophys. Res. Lett., 32, L11802, doi:10.1029/2005GL022473.

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