Abstract
Abstract Heterogeneous freezing nucleation in electric fields was studied on samples of water containing organic nuclei or silver iodide. Electric fields of 6000 V cm−1 (dc) were applied over sets of supercooled drops supported on a silicone varnish coated surface during different time-temperature sequences. In no case was a significant difference in the nucleation rates observed due to application of the field. It is concluded from these experiments that electric fields of up to 6000 V cm−1 have no intrinsic effect on the heterogeneous freezing process and that the probability of enhanced ice nucleation in the atmosphere due to natural electric fields is quite remote.
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