Laboratory evidence for volume-dominated nucleation of ice in supercooled water microdroplets D. Duft and T. Leisner Institut für Physik, Technische Universität Ilmenau, 98684 Ilmenau, Germany
Abstract. We report on measurements of the rate of homogeneous ice nucleation in
supercooled water microdroplets levitated in an electrodynamic balance. By
comparison of the freezing probability for droplets of radius 49 µm and
19 µm, we are able to conclude that homogeneous freezing is a
volume-proportional process and that surface nucleation might only be
important, if at all, for much smaller droplets.
Citation: Duft, D. and Leisner, T.: Laboratory evidence for volume-dominated nucleation of ice in supercooled water microdroplets, Atmos. Chem. Phys. Discuss., 4, 3077-3088, doi:10.5194/acpd-4-3077-2004, 2004.