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: 5.668 IF 5.668
  • IF 5-year value: 6.201 IF 5-year
    6.201
  • CiteScore value: 6.13 CiteScore
    6.13
  • SNIP value: 1.633 SNIP 1.633
  • IPP value: 5.91 IPP 5.91
  • SJR value: 2.938 SJR 2.938
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 174 Scimago H
    index 174
  • h5-index value: 87 h5-index 87
Volume 9, issue 13
Atmos. Chem. Phys., 9, 4295-4300, 2009
https://doi.org/10.5194/acp-9-4295-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.
Atmos. Chem. Phys., 9, 4295-4300, 2009
https://doi.org/10.5194/acp-9-4295-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.

  03 Jul 2009

03 Jul 2009

Freezing of water droplets colliding with kaolinite particles

E. A. Svensson1, C. Delval2,3, P. von Hessberg2, M. S. Johnson2, and J. B. C. Pettersson1 E. A. Svensson et al.
  • 1Department of Chemistry, Atmospheric Science, University of Gothenburg, 41296 Gothenburg, Sweden
  • 2Copenhagen Centre for Atmospheric Research, Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 København Ø, Denmark
  • 3EPFL STI IMT LOA, Station 17, 1015 Lausanne, Switzerland

Abstract. Contact freezing of single supercooled water droplets colliding with kaolinite dust particles has been investigated. The experiments were performed with droplets levitated in an electrodynamic balance at temperatures from 240 to 268 K. Under relatively dry conditions (when no water vapor was added) freezing was observed to occur below 249 K, while a freezing threshold of 267 K was observed when water vapor was added to the air in the chamber.

The effect of relative humidity is attributed to an influence on the contact freezing process for the kaolinite-water droplet system, and it is not related to the lifetime of the droplets in the electrodynamic balance. Freezing probabilities per collision were derived assuming that collisions at the lowest temperature employed had a probability of unity. Mechanisms for contact freezing are briefly discussed.

Publications Copernicus
Download
Citation
Share