Possible Application of Bacterial Condensation Freezing to Artificial Rainfall Enhancement

Z. Levin, S. A. Yankofsky, D. Pardes, N. Magal

Research output: Contribution to journalArticlepeer-review


Both gram-positive and gram-negative bacteria become excellent condensation nuclei when lyophilized to dryness. The same freeze-dry procedure does not inactivate the highly effective freezing nuclei produced by ice nucleation active bacteria. Therefore, irrespective of their contact nucleation potential, ice nucleation-active bacteria ought to effect condensation freezing at −10°C of warmer in cloud systems. Output from a numerical cloud model suggests that the condensation freezing capability of ice nucleation-active bacteria at warmer temperatures could be exploited to produce rainfall from clouds too warm to respond positively to inorganic nucleants like silver iodide.
Original languageEnglish
Pages (from-to)1188-1197
Number of pages10
JournalJournal of Applied Meteorology and Climatology
Issue number9
StatePublished - 1 Sep 1987

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