Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 5.509 IF 5.509
  • IF 5-year value: 5.689 IF 5-year 5.689
  • CiteScore value: 5.44 CiteScore 5.44
  • SNIP value: 1.519 SNIP 1.519
  • SJR value: 3.032 SJR 3.032
  • IPP value: 5.37 IPP 5.37
  • h5-index value: 86 h5-index 86
  • Scimago H index value: 161 Scimago H index 161
Volume 11, issue 5 | Copyright

Special issue: Water Vapour in the Climate System (WAVACS) COST action: observations,...

Atmos. Chem. Phys., 11, 2031-2037, 2011
https://doi.org/10.5194/acp-11-2031-2011
© Author(s) 2011. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 07 Mar 2011

Research article | 07 Mar 2011

Charge induced stability of water droplets in subsaturated environment

J. K. Nielsen1, C. Maus2, D. Rzesanke3, and T. Leisner3 J. K. Nielsen et al.
  • 1Danish Meterological Institute, Lyngbyvej 100, 2100 Kbh Ø, Denmark
  • 2Technical University Ilmenau (TUI), Institute for Physics, Postfach 100565, 98684 Ilmenau, Germany
  • 3Karlsruhe Institute of Technology (KIT), Institute for Meteorology and Climate Research, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany

Abstract. Atmospheric liquid and solid water particles are stabilized if they are coated with either negative or positive electric charge. The surface charge causes an increase of the partial pressure of water vapour close to the surface of each particle, effectively allowing the particles to remain in their condensed phase even if the environmental relative humidity drops below unity. The theory, briefly presented in this paper, predicts a zero parameter relation between surface charge density and water vapour pressure. This relation was tested in a series of Electrodynamic Balance experiments. The measurements were performed by stabilizing charged droplets of pure water near an ice-surface. We observed a divergence in radius as the temperature approached the freezing point from below. We find that the measurements confirm the theory within the experimental uncertainty. In some cases this generally overlooked effect may have impact on cloud processes and on results produced by Electrodynamic Balance experiments.

Download & links
Publications Copernicus
Special issue
Download
Citation
Share