Your browser has javascript turned off or blocked. This will lead to some parts of our website to not work properly or at all. Turn on javascript for best performance.

The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Default user image.

Göran Frank

Director of graduate studies

Default user image.

Intercomparison of cloud condensation nuclei and hygroscopic fraction measurements: Coated soot particles investigated during the LACIS Experiment in November (LExNo)

Author

  • J. R. Snider
  • H. Wex
  • D. Rose
  • A. Kristensson
  • F. Stratmann
  • T. Hennig
  • S. Hennig
  • A. Kiselev
  • M. Bilde
  • M. Burkhart
  • U. Dusek
  • Göran Frank
  • A. Kiendler-Scharr
  • T. F. Mentel
  • M. D. Petters
  • U. Poeschl

Summary, in English

Four cloud condensation nuclei (CCN) instruments were used to sample size-selected particles prepared at the Leipzig Aerosol Cloud Interaction Simulator facility. Included were two Wyoming static diffusion CCN instruments, the continuous flow instrument built by Droplet Measurement Technologies, and the continuous flow Leipzig instrument. The aerosols were composed of ammonium sulfate, levoglucosan, levoglucosan and soot, and ammonium hydrogen sulfate and soot. Comparisons are made among critical supersaturation values from the CCN instruments and derived from measurements made with a humidified tandem differential mobility system. The comparison is quite encouraging: with few exceptions the reported critical supersaturations agree within known experimental uncertainty limits. Also reported are CCN- and hygroscopicity-based estimates of the soot particles' solute fraction. Relative differences between these are as large as 40%, but an error analysis demonstrates that agreement within experimental uncertainty is achieved. We also analyze data from the Droplet Measurement Technologies and the two Wyoming static diffusion instruments for evidence of size distribution broadening and investigate levoglucosan particle growth kinetics in the Wyoming CCN instrument.

Department/s

  • MERGE: ModElling the Regional and Global Earth system

Publishing year

2010

Language

English

Pages

11205-11205

Publication/Series

Journal of Geophysical Research

Volume

115

Document type

Journal article

Publisher

Wiley-Blackwell

Topic

  • Subatomic Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 2156-2202